/*
 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.swing;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.KeyboardFocusManager;
import java.awt.Frame;
import java.awt.Point;
import java.awt.HeadlessException;
import java.awt.Window;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Vector;
import javax.swing.plaf.OptionPaneUI;
import javax.swing.event.InternalFrameEvent;
import javax.swing.event.InternalFrameAdapter;
import javax.accessibility.*;
import static javax.swing.ClientPropertyKey.PopupFactory_FORCE_HEAVYWEIGHT_POPUP;

JOptionPane makes it easy to pop up a standard dialog box that
prompts users for a value or informs them of something.
For information about using JOptionPane, see
How to Make Dialogs,
a section in The Java Tutorial.

While the JOptionPane
class may appear complex because of the large number of methods, almost
all uses of this class are one-line calls to one of the static
showXxxDialog methods shown below:



   
Method Name
   
Description


   
showConfirmDialog
   
Asks a confirming question, like yes/no/cancel.


   
showInputDialog
   
Prompt for some input.


  
showMessageDialog
  
Tell the user about something that has happened.


  
showOptionDialog
  
The Grand Unification of the above three.



Each of these methods also comes in a showInternalXXX flavor, which uses an internal frame to hold the dialog box (see JInternalFrame). Multiple convenience methods have also been defined -- overloaded versions of the basic methods that use different parameter lists. 

All dialogs are modal. Each showXxxDialog method blocks
the caller until the user's interaction is complete.


 
icon
 
message


 
input value


  
option buttons


The basic appearance of one of these dialog boxes is generally
similar to the picture at the right, although the various
look-and-feels are
ultimately responsible for the final result.  In particular, the
look-and-feels will adjust the layout to accommodate the option pane's
ComponentOrientation property.



Parameters:

The parameters to these methods follow consistent patterns:


parentComponent

Defines the Component that is to be the parent of this
dialog box.
It is used in two ways: the Frame that contains
it is used as the Frame
parent for the dialog box, and its screen coordinates are used in
the placement of the dialog box. In general, the dialog box is placed
just below the component. This parameter may be null,
in which case a default Frame is used as the parent, and the dialog will be centered on the screen (depending on the L&F). 
message

A descriptive message to be placed in the dialog box.
In the most common usage, message is just a String or
String constant.
However, the type of this parameter is actually Object. Its
interpretation depends on its type:

Object[]
An array of objects is interpreted as a series of
                messages (one per object) arranged in a vertical stack.
                The interpretation is recursive -- each object in the
                array is interpreted according to its type.
Component
The Component is displayed in the dialog.
Icon
The Icon is wrapped in a JLabel
              and displayed in the dialog.
others
The object is converted to a String by calling
              its toString method. The result is wrapped in a
              JLabel and displayed.

messageType
Defines the style of the message. The Look and Feel
manager may lay out the dialog differently depending on this value, and
will often provide a default icon. The possible values are:

ERROR_MESSAGE
INFORMATION_MESSAGE
WARNING_MESSAGE
QUESTION_MESSAGE
PLAIN_MESSAGE

optionType
Defines the set of option buttons that appear at
the bottom of the dialog box:

DEFAULT_OPTION
YES_NO_OPTION
YES_NO_CANCEL_OPTION
OK_CANCEL_OPTION

You aren't limited to this set of option buttons.  You can provide any
buttons you want using the options parameter.
options
A more detailed description of the set of option buttons
that will appear at the bottom of the dialog box.
The usual value for the options parameter is an array of
Strings. But
the parameter type is an array of Objects.
A button is created for each object depending on its type:

Component
The component is added to the button row directly.
Icon
A JButton is created with this as its label.
other
The Object is converted to a string using its
             toString method and the result is used to
             label a JButton.

icon
A decorative icon to be placed in the dialog box. A default
value for this is determined by the messageType parameter.
title
The title for the dialog box.
initialValue
The default selection (input value).



When the selection is changed, setValue is invoked,
which generates a PropertyChangeEvent.

If a JOptionPane has configured to all input
setWantsInput
the bound property JOptionPane.INPUT_VALUE_PROPERTY
 can also be listened
to, to determine when the user has input or selected a value.

When one of the showXxxDialog methods returns an integer,
the possible values are:

YES_OPTION
NO_OPTION
CANCEL_OPTION
OK_OPTION
CLOSED_OPTION

Examples:

Show an error dialog that displays the message, 'alert':

JOptionPane.showMessageDialog(null, "alert", "alert", JOptionPane.ERROR_MESSAGE);

Show an internal information dialog with the message, 'information':
JOptionPane.showInternalMessageDialog(frame, "information",
            "information", JOptionPane.INFORMATION_MESSAGE);

Show an information panel with the options yes/no and message 'choose one':
JOptionPane.showConfirmDialog(null,
            "choose one", "choose one", JOptionPane.YES_NO_OPTION);

Show an internal information dialog with the options yes/no/cancel and
message 'please choose one' and title information:
JOptionPane.showInternalConfirmDialog(frame,
            "please choose one", "information",
            JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.INFORMATION_MESSAGE);

Show a warning dialog with the options OK, CANCEL, title 'Warning', and
message 'Click OK to continue':
Object[] options = { "OK", "CANCEL" };
JOptionPane.showOptionDialog(null, "Click OK to continue", "Warning",
            JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,
            null, options, options[0]);

Show a dialog asking the user to type in a String:

String inputValue = JOptionPane.showInputDialog("Please input a value");

Show a dialog asking the user to select a String:
Object[] possibleValues = { "First", "Second", "Third" };

Object selectedValue = JOptionPane.showInputDialog(null,
            "Choose one", "Input",
            JOptionPane.INFORMATION_MESSAGE, null,
            possibleValues, possibleValues[0]);


Direct Use:

To create and use an JOptionPane directly, the
standard pattern is roughly as follows:
    JOptionPane pane = new JOptionPane(arguments);
    pane.set.Xxxx(...); // Configure
    JDialog dialog = pane.createDialog(parentComponent, title);
    dialog.show();
    Object selectedValue = pane.getValue();
    if(selectedValue == null)
      return CLOSED_OPTION;
    //If there is not an array of option buttons:
    if(options == null) {
      if(selectedValue instanceof Integer)
         return ((Integer)selectedValue).intValue();
      return CLOSED_OPTION;
    }
    //If there is an array of option buttons:
    for(int counter = 0, maxCounter = options.length;
       counter < maxCounter; counter++) {
       if(options[counter].equals(selectedValue))
       return counter;
    }
    return CLOSED_OPTION;


Warning: Swing is not thread safe. For more
information see Swing's Threading
Policy.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans™
has been added to the java.beans package. Please see XMLEncoder. 
Author:
James Gosling, Scott Violet
See Also:
JInternalFrame
@beaninfo

     attribute: isContainer true
   description: A component which implements standard dialog box controls./**
 * <code>JOptionPane</code> makes it easy to pop up a standard dialog box that
 * prompts users for a value or informs them of something.
 * For information about using <code>JOptionPane</code>, see
 * <a
 href="https://docs.oracle.com/javase/tutorial/uiswing/components/dialog.html">How to Make Dialogs</a>,
 * a section in <em>The Java Tutorial</em>.
 *
 * <p>
 *
 * While the <code>JOptionPane</code>
 * class may appear complex because of the large number of methods, almost
 * all uses of this class are one-line calls to one of the static
 * <code>showXxxDialog</code> methods shown below:
 * <blockquote>
 *
 *
 * <table border=1 summary="Common JOptionPane method names and their descriptions">
 * <tr>
 *    <th>Method Name</th>
 *    <th>Description</th>
 * </tr>
 * <tr>
 *    <td>showConfirmDialog</td>
 *    <td>Asks a confirming question, like yes/no/cancel.</td>
 * </tr>
 * <tr>
 *    <td>showInputDialog</td>
 *    <td>Prompt for some input.</td>
 * </tr>
 * <tr>
 *   <td>showMessageDialog</td>
 *   <td>Tell the user about something that has happened.</td>
 * </tr>
 * <tr>
 *   <td>showOptionDialog</td>
 *   <td>The Grand Unification of the above three.</td>
 * </tr>
 * </table>
 *
 * </blockquote>
 * Each of these methods also comes in a <code>showInternalXXX</code>
 * flavor, which uses an internal frame to hold the dialog box (see
 * {@link JInternalFrame}).
 * Multiple convenience methods have also been defined -- overloaded
 * versions of the basic methods that use different parameter lists.
 * <p>
 * All dialogs are modal. Each <code>showXxxDialog</code> method blocks
 * the caller until the user's interaction is complete.
 *
 * <table cellspacing=6 cellpadding=4 border=0 style="float:right" summary="layout">
 * <tr>
 *  <td style="background-color:#FFe0d0" rowspan=2>icon</td>
 *  <td style="background-color:#FFe0d0">message</td>
 * </tr>
 * <tr>
 *  <td style="background-color:#FFe0d0">input value</td>
 * </tr>
 * <tr>
 *   <td style="background-color:#FFe0d0" colspan=2>option buttons</td>
 * </tr>
 * </table>
 *
 * The basic appearance of one of these dialog boxes is generally
 * similar to the picture at the right, although the various
 * look-and-feels are
 * ultimately responsible for the final result.  In particular, the
 * look-and-feels will adjust the layout to accommodate the option pane's
 * <code>ComponentOrientation</code> property.
 * <br style="clear:all">
 * <p>
 * <b>Parameters:</b><br>
 * The parameters to these methods follow consistent patterns:
 * <blockquote>
 * <dl compact>
 * <dt>parentComponent<dd>
 * Defines the <code>Component</code> that is to be the parent of this
 * dialog box.
 * It is used in two ways: the <code>Frame</code> that contains
 * it is used as the <code>Frame</code>
 * parent for the dialog box, and its screen coordinates are used in
 * the placement of the dialog box. In general, the dialog box is placed
 * just below the component. This parameter may be <code>null</code>,
 * in which case a default <code>Frame</code> is used as the parent,
 * and the dialog will be
 * centered on the screen (depending on the {@literal L&F}).
 * <dt><a name=message>message</a><dd>
 * A descriptive message to be placed in the dialog box.
 * In the most common usage, message is just a <code>String</code> or
 * <code>String</code> constant.
 * However, the type of this parameter is actually <code>Object</code>. Its
 * interpretation depends on its type:
 * <dl compact>
 * <dt>Object[]<dd>An array of objects is interpreted as a series of
 *                 messages (one per object) arranged in a vertical stack.
 *                 The interpretation is recursive -- each object in the
 *                 array is interpreted according to its type.
 * <dt>Component<dd>The <code>Component</code> is displayed in the dialog.
 * <dt>Icon<dd>The <code>Icon</code> is wrapped in a <code>JLabel</code>
 *               and displayed in the dialog.
 * <dt>others<dd>The object is converted to a <code>String</code> by calling
 *               its <code>toString</code> method. The result is wrapped in a
 *               <code>JLabel</code> and displayed.
 * </dl>
 * <dt>messageType<dd>Defines the style of the message. The Look and Feel
 * manager may lay out the dialog differently depending on this value, and
 * will often provide a default icon. The possible values are:
 * <ul>
 * <li><code>ERROR_MESSAGE</code>
 * <li><code>INFORMATION_MESSAGE</code>
 * <li><code>WARNING_MESSAGE</code>
 * <li><code>QUESTION_MESSAGE</code>
 * <li><code>PLAIN_MESSAGE</code>
 * </ul>
 * <dt>optionType<dd>Defines the set of option buttons that appear at
 * the bottom of the dialog box:
 * <ul>
 * <li><code>DEFAULT_OPTION</code>
 * <li><code>YES_NO_OPTION</code>
 * <li><code>YES_NO_CANCEL_OPTION</code>
 * <li><code>OK_CANCEL_OPTION</code>
 * </ul>
 * You aren't limited to this set of option buttons.  You can provide any
 * buttons you want using the options parameter.
 * <dt>options<dd>A more detailed description of the set of option buttons
 * that will appear at the bottom of the dialog box.
 * The usual value for the options parameter is an array of
 * <code>String</code>s. But
 * the parameter type is an array of <code>Objects</code>.
 * A button is created for each object depending on its type:
 * <dl compact>
 * <dt>Component<dd>The component is added to the button row directly.
 * <dt>Icon<dd>A <code>JButton</code> is created with this as its label.
 * <dt>other<dd>The <code>Object</code> is converted to a string using its
 *              <code>toString</code> method and the result is used to
 *              label a <code>JButton</code>.
 * </dl>
 * <dt>icon<dd>A decorative icon to be placed in the dialog box. A default
 * value for this is determined by the <code>messageType</code> parameter.
 * <dt>title<dd>The title for the dialog box.
 * <dt>initialValue<dd>The default selection (input value).
 * </dl>
 * </blockquote>
 * <p>
 * When the selection is changed, <code>setValue</code> is invoked,
 * which generates a <code>PropertyChangeEvent</code>.
 * <p>
 * If a <code>JOptionPane</code> has configured to all input
 * <code>setWantsInput</code>
 * the bound property <code>JOptionPane.INPUT_VALUE_PROPERTY</code>
 *  can also be listened
 * to, to determine when the user has input or selected a value.
 * <p>
 * When one of the <code>showXxxDialog</code> methods returns an integer,
 * the possible values are:
 * <ul>
 * <li><code>YES_OPTION</code>
 * <li><code>NO_OPTION</code>
 * <li><code>CANCEL_OPTION</code>
 * <li><code>OK_OPTION</code>
 * <li><code>CLOSED_OPTION</code>
 * </ul>
 * <b>Examples:</b>
 * <dl>
 * <dt>Show an error dialog that displays the message, 'alert':
 * <dd><code>
 * JOptionPane.showMessageDialog(null, "alert", "alert", JOptionPane.ERROR_MESSAGE);
 * </code>
 * <dt>Show an internal information dialog with the message, 'information':
 * <dd><pre>
 * JOptionPane.showInternalMessageDialog(frame, "information",
 *             "information", JOptionPane.INFORMATION_MESSAGE);
 * </pre>
 * <dt>Show an information panel with the options yes/no and message 'choose one':
 * <dd><pre>JOptionPane.showConfirmDialog(null,
 *             "choose one", "choose one", JOptionPane.YES_NO_OPTION);
 * </pre>
 * <dt>Show an internal information dialog with the options yes/no/cancel and
 * message 'please choose one' and title information:
 * <dd><pre>JOptionPane.showInternalConfirmDialog(frame,
 *             "please choose one", "information",
 *             JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.INFORMATION_MESSAGE);
 * </pre>
 * <dt>Show a warning dialog with the options OK, CANCEL, title 'Warning', and
 * message 'Click OK to continue':
 * <dd><pre>
 * Object[] options = { "OK", "CANCEL" };
 * JOptionPane.showOptionDialog(null, "Click OK to continue", "Warning",
 *             JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,
 *             null, options, options[0]);
 * </pre>
 * <dt>Show a dialog asking the user to type in a String:
 * <dd><code>
 * String inputValue = JOptionPane.showInputDialog("Please input a value");
 * </code>
 * <dt>Show a dialog asking the user to select a String:
 * <dd><pre>
 * Object[] possibleValues = { "First", "Second", "Third" };<br>
 * Object selectedValue = JOptionPane.showInputDialog(null,
 *             "Choose one", "Input",
 *             JOptionPane.INFORMATION_MESSAGE, null,
 *             possibleValues, possibleValues[0]);
 * </pre><p>
 * </dl>
 * <b>Direct Use:</b><br>
 * To create and use an <code>JOptionPane</code> directly, the
 * standard pattern is roughly as follows:
 * <pre>
 *     JOptionPane pane = new JOptionPane(<i>arguments</i>);
 *     pane.set<i>.Xxxx(...); // Configure</i>
 *     JDialog dialog = pane.createDialog(<i>parentComponent, title</i>);
 *     dialog.show();
 *     Object selectedValue = pane.getValue();
 *     if(selectedValue == null)
 *       return CLOSED_OPTION;
 *     <i>//If there is <b>not</b> an array of option buttons:</i>
 *     if(options == null) {
 *       if(selectedValue instanceof Integer)
 *          return ((Integer)selectedValue).intValue();
 *       return CLOSED_OPTION;
 *     }
 *     <i>//If there is an array of option buttons:</i>
 *     for(int counter = 0, maxCounter = options.length;
 *        counter &lt; maxCounter; counter++) {
 *        if(options[counter].equals(selectedValue))
 *        return counter;
 *     }
 *     return CLOSED_OPTION;
 * </pre>
 * <p>
 * <strong>Warning:</strong> Swing is not thread safe. For more
 * information see <a
 * href="package-summary.html#threading">Swing's Threading
 * Policy</a>.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @see JInternalFrame
 *
 * @beaninfo
 *      attribute: isContainer true
 *    description: A component which implements standard dialog box controls.
 *
 * @author James Gosling
 * @author Scott Violet
 */
public class JOptionPane extends JComponent implements Accessible
{
    
See Also:
getUIClassID
readObject/**
     * @see #getUIClassID
     * @see #readObject
     */
    private static final String uiClassID = "OptionPaneUI";

    
Indicates that the user has not yet selected a value.
/**
     * Indicates that the user has not yet selected a value.
     */
    public static final Object      UNINITIALIZED_VALUE = "uninitializedValue";

    //
    // Option types
    //

    
Type meaning Look and Feel should not supply any options -- only
use the options from the JOptionPane.
/**
     * Type meaning Look and Feel should not supply any options -- only
     * use the options from the <code>JOptionPane</code>.
     */
    public static final int         DEFAULT_OPTION = -1;
    
Type used for showConfirmDialog. /** Type used for <code>showConfirmDialog</code>. */
    public static final int         YES_NO_OPTION = 0;
    
Type used for showConfirmDialog. /** Type used for <code>showConfirmDialog</code>. */
    public static final int         YES_NO_CANCEL_OPTION = 1;
    
Type used for showConfirmDialog. /** Type used for <code>showConfirmDialog</code>. */
    public static final int         OK_CANCEL_OPTION = 2;

    //
    // Return values.
    //
    
Return value from class method if YES is chosen. /** Return value from class method if YES is chosen. */
    public static final int         YES_OPTION = 0;
    
Return value from class method if NO is chosen. /** Return value from class method if NO is chosen. */
    public static final int         NO_OPTION = 1;
    
Return value from class method if CANCEL is chosen. /** Return value from class method if CANCEL is chosen. */
    public static final int         CANCEL_OPTION = 2;
    
Return value form class method if OK is chosen. /** Return value form class method if OK is chosen. */
    public static final int         OK_OPTION = 0;
    
Return value from class method if user closes window without selecting
anything, more than likely this should be treated as either a
CANCEL_OPTION or NO_OPTION. /** Return value from class method if user closes window without selecting
     * anything, more than likely this should be treated as either a
     * <code>CANCEL_OPTION</code> or <code>NO_OPTION</code>. */
    public static final int         CLOSED_OPTION = -1;

    //
    // Message types. Used by the UI to determine what icon to display,
    // and possibly what behavior to give based on the type.
    //
    
Used for error messages. /** Used for error messages. */
    public static final int  ERROR_MESSAGE = 0;
    
Used for information messages. /** Used for information messages. */
    public static final int  INFORMATION_MESSAGE = 1;
    
Used for warning messages. /** Used for warning messages. */
    public static final int  WARNING_MESSAGE = 2;
    
Used for questions. /** Used for questions. */
    public static final int  QUESTION_MESSAGE = 3;
    
No icon is used. /** No icon is used. */
    public static final int   PLAIN_MESSAGE = -1;

    
Bound property name for icon. /** Bound property name for <code>icon</code>. */
    public static final String      ICON_PROPERTY = "icon";
    
Bound property name for message. /** Bound property name for <code>message</code>. */
    public static final String      MESSAGE_PROPERTY = "message";
    
Bound property name for value. /** Bound property name for <code>value</code>. */
    public static final String      VALUE_PROPERTY = "value";
    
Bound property name for option. /** Bound property name for <code>option</code>. */
    public static final String      OPTIONS_PROPERTY = "options";
    
Bound property name for initialValue. /** Bound property name for <code>initialValue</code>. */
    public static final String      INITIAL_VALUE_PROPERTY = "initialValue";
    
Bound property name for type. /** Bound property name for <code>type</code>. */
    public static final String      MESSAGE_TYPE_PROPERTY = "messageType";
    
Bound property name for optionType. /** Bound property name for <code>optionType</code>. */
    public static final String      OPTION_TYPE_PROPERTY = "optionType";
    
Bound property name for selectionValues. /** Bound property name for <code>selectionValues</code>. */
    public static final String      SELECTION_VALUES_PROPERTY = "selectionValues";
    
Bound property name for initialSelectionValue. /** Bound property name for <code>initialSelectionValue</code>. */
    public static final String      INITIAL_SELECTION_VALUE_PROPERTY = "initialSelectionValue";
    
Bound property name for inputValue. /** Bound property name for <code>inputValue</code>. */
    public static final String      INPUT_VALUE_PROPERTY = "inputValue";
    
Bound property name for wantsInput. /** Bound property name for <code>wantsInput</code>. */
    public static final String      WANTS_INPUT_PROPERTY = "wantsInput";

    
Icon used in pane. /** Icon used in pane. */
    transient protected Icon                  icon;
    
Message to display. /** Message to display. */
    transient protected Object                message;
    
Options to display to the user. /** Options to display to the user. */
    transient protected Object[]              options;
    
Value that should be initially selected in options. /** Value that should be initially selected in <code>options</code>. */
    transient protected Object                initialValue;
    
Message type. /** Message type. */
    protected int                   messageType;
    
Option type, one of DEFAULT_OPTION,
YES_NO_OPTION,
YES_NO_CANCEL_OPTION or
OK_CANCEL_OPTION.
/**
     * Option type, one of <code>DEFAULT_OPTION</code>,
     * <code>YES_NO_OPTION</code>,
     * <code>YES_NO_CANCEL_OPTION</code> or
     * <code>OK_CANCEL_OPTION</code>.
     */
    protected int                   optionType;
    
Currently selected value, will be a valid option, or
UNINITIALIZED_VALUE or null. /** Currently selected value, will be a valid option, or
     * <code>UNINITIALIZED_VALUE</code> or <code>null</code>. */
    transient protected Object                value;
    
Array of values the user can choose from. Look and feel will
provide the UI component to choose this from. /** Array of values the user can choose from. Look and feel will
     * provide the UI component to choose this from. */
    protected transient Object[]              selectionValues;
    
Value the user has input. /** Value the user has input. */
    protected transient Object                inputValue;
    
Initial value to select in selectionValues. /** Initial value to select in <code>selectionValues</code>. */
    protected transient Object                initialSelectionValue;
    
If true, a UI widget will be provided to the user to get input. /** If true, a UI widget will be provided to the user to get input. */
    protected boolean                         wantsInput;


    
Shows a question-message dialog requesting input from the user. The
dialog uses the default frame, which usually means it is centered on
the screen.
Params:
message – the Object to display
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless/**
     * Shows a question-message dialog requesting input from the user. The
     * dialog uses the default frame, which usually means it is centered on
     * the screen.
     *
     * @param message the <code>Object</code> to display
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Object message)
        throws HeadlessException {
        return showInputDialog(null, message);
    }

    
Shows a question-message dialog requesting input from the user, with
the input value initialized to initialSelectionValue. The
dialog uses the default frame, which usually means it is centered on
the screen.
Params:
message – the Object to display
initialSelectionValue – the value used to initialize the input
                field
Since:
1.4/**
     * Shows a question-message dialog requesting input from the user, with
     * the input value initialized to <code>initialSelectionValue</code>. The
     * dialog uses the default frame, which usually means it is centered on
     * the screen.
     *
     * @param message the <code>Object</code> to display
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @since 1.4
     */
    public static String showInputDialog(Object message, Object initialSelectionValue) {
        return showInputDialog(null, message, initialSelectionValue);
    }

    
Shows a question-message dialog requesting input from the user
parented to parentComponent.
The dialog is displayed on top of the Component's
frame, and is usually positioned below the Component.
Params:
parentComponent –  the parent Component for the
         dialog
message –  the Object to display
Throws:
HeadlessException – if
   GraphicsEnvironment.isHeadless returns
   true
See Also:
GraphicsEnvironment.isHeadless/**
     * Shows a question-message dialog requesting input from the user
     * parented to <code>parentComponent</code>.
     * The dialog is displayed on top of the <code>Component</code>'s
     * frame, and is usually positioned below the <code>Component</code>.
     *
     * @param parentComponent  the parent <code>Component</code> for the
     *          dialog
     * @param message  the <code>Object</code> to display
     * @exception HeadlessException if
     *    <code>GraphicsEnvironment.isHeadless</code> returns
     *    <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Component parentComponent,
        Object message) throws HeadlessException {
        return showInputDialog(parentComponent, message, UIManager.getString(
            "OptionPane.inputDialogTitle", parentComponent), QUESTION_MESSAGE);
    }

    
Shows a question-message dialog requesting input from the user and
parented to parentComponent. The input value will be
initialized to initialSelectionValue.
The dialog is displayed on top of the Component's
frame, and is usually positioned below the Component.
Params:
parentComponent –  the parent Component for the
         dialog
message – the Object to display
initialSelectionValue – the value used to initialize the input
                field
Since:
1.4/**
     * Shows a question-message dialog requesting input from the user and
     * parented to <code>parentComponent</code>. The input value will be
     * initialized to <code>initialSelectionValue</code>.
     * The dialog is displayed on top of the <code>Component</code>'s
     * frame, and is usually positioned below the <code>Component</code>.
     *
     * @param parentComponent  the parent <code>Component</code> for the
     *          dialog
     * @param message the <code>Object</code> to display
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @since 1.4
     */
    public static String showInputDialog(Component parentComponent, Object message,
                                         Object initialSelectionValue) {
        return (String)showInputDialog(parentComponent, message,
                      UIManager.getString("OptionPane.inputDialogTitle",
                      parentComponent), QUESTION_MESSAGE, null, null,
                      initialSelectionValue);
    }

    
Shows a dialog requesting input from the user parented to
parentComponent with the dialog having the title
title and message type messageType.
Params:
parentComponent –  the parent Component for the
                 dialog
message –  the Object to display
title –    the String to display in the dialog
                 title bar
messageType – the type of message that is to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless/**
     * Shows a dialog requesting input from the user parented to
     * <code>parentComponent</code> with the dialog having the title
     * <code>title</code> and message type <code>messageType</code>.
     *
     * @param parentComponent  the parent <code>Component</code> for the
     *                  dialog
     * @param message  the <code>Object</code> to display
     * @param title    the <code>String</code> to display in the dialog
     *                  title bar
     * @param messageType the type of message that is to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Component parentComponent,
        Object message, String title, int messageType)
        throws HeadlessException {
        return (String)showInputDialog(parentComponent, message, title,
                                       messageType, null, null, null);
    }

    
Prompts the user for input in a blocking dialog where the
initial selection, possible selections, and all other options can
be specified. The user will able to choose from
selectionValues, where null implies the
user can input
whatever they wish, usually by means of a JTextField.
initialSelectionValue is the initial value to prompt
the user with. It is up to the UI to decide how best to represent
the selectionValues, but usually a
JComboBox, JList, or
JTextField will be used.
Params:
parentComponent –  the parent Component for the
                 dialog
message –  the Object to display
title –    the String to display in the
                 dialog title bar
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
icon –     the Icon image to display
selectionValues – an array of Objects that
                 gives the possible selections
initialSelectionValue – the value used to initialize the input
                field
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
user's input, or null meaning the user
                 canceled the input/**
     * Prompts the user for input in a blocking dialog where the
     * initial selection, possible selections, and all other options can
     * be specified. The user will able to choose from
     * <code>selectionValues</code>, where <code>null</code> implies the
     * user can input
     * whatever they wish, usually by means of a <code>JTextField</code>.
     * <code>initialSelectionValue</code> is the initial value to prompt
     * the user with. It is up to the UI to decide how best to represent
     * the <code>selectionValues</code>, but usually a
     * <code>JComboBox</code>, <code>JList</code>, or
     * <code>JTextField</code> will be used.
     *
     * @param parentComponent  the parent <code>Component</code> for the
     *                  dialog
     * @param message  the <code>Object</code> to display
     * @param title    the <code>String</code> to display in the
     *                  dialog title bar
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon     the <code>Icon</code> image to display
     * @param selectionValues an array of <code>Object</code>s that
     *                  gives the possible selections
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @return user's input, or <code>null</code> meaning the user
     *                  canceled the input
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static Object showInputDialog(Component parentComponent,
        Object message, String title, int messageType, Icon icon,
        Object[] selectionValues, Object initialSelectionValue)
        throws HeadlessException {
        JOptionPane    pane = new JOptionPane(message, messageType,
                                              OK_CANCEL_OPTION, icon,
                                              null, null);

        pane.setWantsInput(true);
        pane.setSelectionValues(selectionValues);
        pane.setInitialSelectionValue(initialSelectionValue);
        pane.setComponentOrientation(((parentComponent == null) ?
            getRootFrame() : parentComponent).getComponentOrientation());

        int style = styleFromMessageType(messageType);
        JDialog dialog = pane.createDialog(parentComponent, title, style);

        pane.selectInitialValue();
        dialog.show();
        dialog.dispose();

        Object value = pane.getInputValue();

        if (value == UNINITIALIZED_VALUE) {
            return null;
        }
        return value;
    }

    
Brings up an information-message dialog titled "Message".
Params:
parentComponent – determines the Frame in
         which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the Object to display
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless/**
     * Brings up an information-message dialog titled "Message".
     *
     * @param parentComponent determines the <code>Frame</code> in
     *          which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message) throws HeadlessException {
        showMessageDialog(parentComponent, message, UIManager.getString(
                    "OptionPane.messageDialogTitle", parentComponent),
                    INFORMATION_MESSAGE);
    }

    
Brings up a dialog that displays a message using a default
icon determined by the messageType parameter.
Params:
parentComponent – determines the Frame
         in which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the Object to display
title –     the title string for the dialog
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless/**
     * Brings up a dialog that displays a message using a default
     * icon determined by the <code>messageType</code> parameter.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message, String title, int messageType)
        throws HeadlessException {
        showMessageDialog(parentComponent, message, title, messageType, null);
    }

    
Brings up a dialog displaying a message, specifying all parameters.
Params:
parentComponent – determines the Frame in which the
                 dialog is displayed; if null,
                 or if the parentComponent has no
                 Frame, a
                 default Frame is used
message –   the Object to display
title –     the title string for the dialog
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
icon –      an icon to display in the dialog that helps the user
                 identify the kind of message that is being displayed
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless/**
     * Brings up a dialog displaying a message, specifying all parameters.
     *
     * @param parentComponent determines the <code>Frame</code> in which the
     *                  dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon      an icon to display in the dialog that helps the user
     *                  identify the kind of message that is being displayed
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message, String title, int messageType, Icon icon)
        throws HeadlessException {
        showOptionDialog(parentComponent, message, title, DEFAULT_OPTION,
                         messageType, icon, null, null);
    }

    
Brings up a dialog with the options Yes,
No and Cancel; with the
title, Select an Option.
Params:
parentComponent – determines the Frame in which the
                 dialog is displayed; if null,
                 or if the parentComponent has no
                 Frame, a
                 default Frame is used
message –   the Object to display
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
an integer indicating the option selected by the user/**
     * Brings up a dialog with the options <i>Yes</i>,
     * <i>No</i> and <i>Cancel</i>; with the
     * title, <b>Select an Option</b>.
     *
     * @param parentComponent determines the <code>Frame</code> in which the
     *                  dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @return an integer indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message) throws HeadlessException {
        return showConfirmDialog(parentComponent, message,
                                 UIManager.getString("OptionPane.titleText"),
                                 YES_NO_CANCEL_OPTION);
    }

    
Brings up a dialog where the number of choices is determined
by the optionType parameter.
Params:
parentComponent – determines the Frame in which the
                 dialog is displayed; if null,
                 or if the parentComponent has no
                 Frame, a
                 default Frame is used
message –   the Object to display
title –     the title string for the dialog
optionType – an int designating the options available on the dialog:
                 YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 or OK_CANCEL_OPTION
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
an int indicating the option selected by the user/**
     * Brings up a dialog where the number of choices is determined
     * by the <code>optionType</code> parameter.
     *
     * @param parentComponent determines the <code>Frame</code> in which the
     *                  dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param optionType an int designating the options available on the dialog:
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @return an int indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType)
        throws HeadlessException {
        return showConfirmDialog(parentComponent, message, title, optionType,
                                 QUESTION_MESSAGE);
    }

    
Brings up a dialog where the number of choices is determined
by the optionType parameter, where the
messageType
parameter determines the icon to display.
The messageType parameter is primarily used to supply
a default icon from the Look and Feel.
Params:
parentComponent – determines the Frame in
                 which the dialog is displayed; if null,
                 or if the parentComponent has no
                 Frame, a
                 default Frame is used.
message –   the Object to display
title –     the title string for the dialog
optionType – an integer designating the options available
                  on the dialog: YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 or OK_CANCEL_OPTION
messageType – an integer designating the kind of message this is;
                 primarily used to determine the icon from the pluggable
                 Look and Feel: ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
an integer indicating the option selected by the user/**
     * Brings up a dialog where the number of choices is determined
     * by the <code>optionType</code> parameter, where the
     * <code>messageType</code>
     * parameter determines the icon to display.
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the Look and Feel.
     *
     * @param parentComponent determines the <code>Frame</code> in
     *                  which the dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used.
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available
     *                   on the dialog: <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @param messageType an integer designating the kind of message this is;
     *                  primarily used to determine the icon from the pluggable
     *                  Look and Feel: <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @return an integer indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType, int messageType)
        throws HeadlessException {
        return showConfirmDialog(parentComponent, message, title, optionType,
                                messageType, null);
    }

    
Brings up a dialog with a specified icon, where the number of
choices is determined by the optionType parameter.
The messageType parameter is primarily used to supply
a default icon from the look and feel.
Params:
parentComponent – determines the Frame in which the
                 dialog is displayed; if null,
                 or if the parentComponent has no
                 Frame, a
                 default Frame is used
message –   the Object to display
title –     the title string for the dialog
optionType – an int designating the options available on the dialog:
                 YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 or OK_CANCEL_OPTION
messageType – an int designating the kind of message this is,
                 primarily used to determine the icon from the pluggable
                 Look and Feel: ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
icon –      the icon to display in the dialog
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
an int indicating the option selected by the user/**
     * Brings up a dialog with a specified icon, where the number of
     * choices is determined by the <code>optionType</code> parameter.
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame</code> in which the
     *                  dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the Object to display
     * @param title     the title string for the dialog
     * @param optionType an int designating the options available on the dialog:
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @param messageType an int designating the kind of message this is,
     *                  primarily used to determine the icon from the pluggable
     *                  Look and Feel: <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon      the icon to display in the dialog
     * @return an int indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType,
        int messageType, Icon icon) throws HeadlessException {
        return showOptionDialog(parentComponent, message, title, optionType,
                                messageType, icon, null, null);
    }

    
Brings up a dialog with a specified icon, where the initial
choice is determined by the initialValue parameter and
the number of choices is determined by the optionType
parameter.

If optionType is YES_NO_OPTION,
or YES_NO_CANCEL_OPTION
and the options parameter is null,
then the options are
supplied by the look and feel.

The messageType parameter is primarily used to supply
a default icon from the look and feel.
Params:
parentComponent – determines the Frame
                 in which the dialog is displayed;  if
                 null, or if the
                 parentComponent has no
                 Frame, a
                 default Frame is used
message –   the Object to display
title –     the title string for the dialog
optionType – an integer designating the options available on the
                 dialog: DEFAULT_OPTION,
                 YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 or OK_CANCEL_OPTION
messageType – an integer designating the kind of message this is,
                 primarily used to determine the icon from the
                 pluggable Look and Feel: ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
icon –      the icon to display in the dialog
options –   an array of objects indicating the possible choices
                 the user can make; if the objects are components, they
                 are rendered properly; non-String
                 objects are
                 rendered using their toString methods;
                 if this parameter is null,
                 the options are determined by the Look and Feel
initialValue – the object that represents the default selection
                 for the dialog; only meaningful if options
                 is used; can be null
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
an integer indicating the option chosen by the user,
                 or CLOSED_OPTION if the user closed
                 the dialog/**
     * Brings up a dialog with a specified icon, where the initial
     * choice is determined by the <code>initialValue</code> parameter and
     * the number of choices is determined by the <code>optionType</code>
     * parameter.
     * <p>
     * If <code>optionType</code> is <code>YES_NO_OPTION</code>,
     * or <code>YES_NO_CANCEL_OPTION</code>
     * and the <code>options</code> parameter is <code>null</code>,
     * then the options are
     * supplied by the look and feel.
     * <p>
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame</code>
     *                  in which the dialog is displayed;  if
     *                  <code>null</code>, or if the
     *                  <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available on the
     *                  dialog: <code>DEFAULT_OPTION</code>,
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @param messageType an integer designating the kind of message this is,
     *                  primarily used to determine the icon from the
     *                  pluggable Look and Feel: <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon      the icon to display in the dialog
     * @param options   an array of objects indicating the possible choices
     *                  the user can make; if the objects are components, they
     *                  are rendered properly; non-<code>String</code>
     *                  objects are
     *                  rendered using their <code>toString</code> methods;
     *                  if this parameter is <code>null</code>,
     *                  the options are determined by the Look and Feel
     * @param initialValue the object that represents the default selection
     *                  for the dialog; only meaningful if <code>options</code>
     *                  is used; can be <code>null</code>
     * @return an integer indicating the option chosen by the user,
     *                  or <code>CLOSED_OPTION</code> if the user closed
     *                  the dialog
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showOptionDialog(Component parentComponent,
        Object message, String title, int optionType, int messageType,
        Icon icon, Object[] options, Object initialValue)
        throws HeadlessException {
        JOptionPane             pane = new JOptionPane(message, messageType,
                                                       optionType, icon,
                                                       options, initialValue);

        pane.setInitialValue(initialValue);
        pane.setComponentOrientation(((parentComponent == null) ?
            getRootFrame() : parentComponent).getComponentOrientation());

        int style = styleFromMessageType(messageType);
        JDialog dialog = pane.createDialog(parentComponent, title, style);

        pane.selectInitialValue();
        dialog.show();
        dialog.dispose();

        Object        selectedValue = pane.getValue();

        if(selectedValue == null)
            return CLOSED_OPTION;
        if(options == null) {
            if(selectedValue instanceof Integer)
                return ((Integer)selectedValue).intValue();
            return CLOSED_OPTION;
        }
        for(int counter = 0, maxCounter = options.length;
            counter < maxCounter; counter++) {
            if(options[counter].equals(selectedValue))
                return counter;
        }
        return CLOSED_OPTION;
    }

    
Creates and returns a new JDialog wrapping
this centered on the parentComponent
in the parentComponent's frame.
title is the title of the returned dialog.
The returned JDialog will not be resizable by the
user, however programs can invoke setResizable on
the JDialog instance to change this property.
The returned JDialog will be set up such that
once it is closed, or the user clicks on one of the buttons,
the optionpane's value property will be set accordingly and
the dialog will be closed.  Each time the dialog is made visible,
it will reset the option pane's value property to
JOptionPane.UNINITIALIZED_VALUE to ensure the
user's subsequent action closes the dialog properly.
Params:
parentComponent – determines the frame in which the dialog
         is displayed; if the parentComponent has
         no Frame, a default Frame is used
title –     the title string for the dialog
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
a new JDialog containing this instance/**
     * Creates and returns a new <code>JDialog</code> wrapping
     * <code>this</code> centered on the <code>parentComponent</code>
     * in the <code>parentComponent</code>'s frame.
     * <code>title</code> is the title of the returned dialog.
     * The returned <code>JDialog</code> will not be resizable by the
     * user, however programs can invoke <code>setResizable</code> on
     * the <code>JDialog</code> instance to change this property.
     * The returned <code>JDialog</code> will be set up such that
     * once it is closed, or the user clicks on one of the buttons,
     * the optionpane's value property will be set accordingly and
     * the dialog will be closed.  Each time the dialog is made visible,
     * it will reset the option pane's value property to
     * <code>JOptionPane.UNINITIALIZED_VALUE</code> to ensure the
     * user's subsequent action closes the dialog properly.
     *
     * @param parentComponent determines the frame in which the dialog
     *          is displayed; if the <code>parentComponent</code> has
     *          no <code>Frame</code>, a default <code>Frame</code> is used
     * @param title     the title string for the dialog
     * @return a new <code>JDialog</code> containing this instance
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public JDialog createDialog(Component parentComponent, String title)
        throws HeadlessException {
        int style = styleFromMessageType(getMessageType());
        return createDialog(parentComponent, title, style);
    }

    
Creates and returns a new parentless JDialog
with the specified title.
The returned JDialog will not be resizable by the
user, however programs can invoke setResizable on
the JDialog instance to change this property.
The returned JDialog will be set up such that
once it is closed, or the user clicks on one of the buttons,
the optionpane's value property will be set accordingly and
the dialog will be closed.  Each time the dialog is made visible,
it will reset the option pane's value property to
JOptionPane.UNINITIALIZED_VALUE to ensure the
user's subsequent action closes the dialog properly.
Params:
title –     the title string for the dialog
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
a new JDialog containing this instance
Since:
1.6/**
     * Creates and returns a new parentless <code>JDialog</code>
     * with the specified title.
     * The returned <code>JDialog</code> will not be resizable by the
     * user, however programs can invoke <code>setResizable</code> on
     * the <code>JDialog</code> instance to change this property.
     * The returned <code>JDialog</code> will be set up such that
     * once it is closed, or the user clicks on one of the buttons,
     * the optionpane's value property will be set accordingly and
     * the dialog will be closed.  Each time the dialog is made visible,
     * it will reset the option pane's value property to
     * <code>JOptionPane.UNINITIALIZED_VALUE</code> to ensure the
     * user's subsequent action closes the dialog properly.
     *
     * @param title     the title string for the dialog
     * @return a new <code>JDialog</code> containing this instance
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @since 1.6
     */
    public JDialog createDialog(String title) throws HeadlessException {
        int style = styleFromMessageType(getMessageType());
        JDialog dialog = new JDialog((Dialog) null, title, true);
        initDialog(dialog, style, null);
        return dialog;
    }

    private JDialog createDialog(Component parentComponent, String title,
            int style)
            throws HeadlessException {

        final JDialog dialog;

        Window window = JOptionPane.getWindowForComponent(parentComponent);
        if (window instanceof Frame) {
            dialog = new JDialog((Frame)window, title, true);
        } else {
            dialog = new JDialog((Dialog)window, title, true);
        }
        if (window instanceof SwingUtilities.SharedOwnerFrame) {
            WindowListener ownerShutdownListener =
                    SwingUtilities.getSharedOwnerFrameShutdownListener();
            dialog.addWindowListener(ownerShutdownListener);
        }
        initDialog(dialog, style, parentComponent);
        return dialog;
    }

    private void initDialog(final JDialog dialog, int style, Component parentComponent) {
        dialog.setComponentOrientation(this.getComponentOrientation());
        Container contentPane = dialog.getContentPane();

        contentPane.setLayout(new BorderLayout());
        contentPane.add(this, BorderLayout.CENTER);
        dialog.setResizable(false);
        if (JDialog.isDefaultLookAndFeelDecorated()) {
            boolean supportsWindowDecorations =
              UIManager.getLookAndFeel().getSupportsWindowDecorations();
            if (supportsWindowDecorations) {
                dialog.setUndecorated(true);
                getRootPane().setWindowDecorationStyle(style);
            }
        }
        dialog.pack();
        dialog.setLocationRelativeTo(parentComponent);

        final PropertyChangeListener listener = new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                // Let the defaultCloseOperation handle the closing
                // if the user closed the window without selecting a button
                // (newValue = null in that case).  Otherwise, close the dialog.
                if (dialog.isVisible() && event.getSource() == JOptionPane.this &&
                        (event.getPropertyName().equals(VALUE_PROPERTY)) &&
                        event.getNewValue() != null &&
                        event.getNewValue() != JOptionPane.UNINITIALIZED_VALUE) {
                    dialog.setVisible(false);
                }
            }
        };

        WindowAdapter adapter = new WindowAdapter() {
            private boolean gotFocus = false;
            public void windowClosing(WindowEvent we) {
                setValue(null);
            }

            public void windowClosed(WindowEvent e) {
                removePropertyChangeListener(listener);
                dialog.getContentPane().removeAll();
            }

            public void windowGainedFocus(WindowEvent we) {
                // Once window gets focus, set initial focus
                if (!gotFocus) {
                    selectInitialValue();
                    gotFocus = true;
                }
            }
        };
        dialog.addWindowListener(adapter);
        dialog.addWindowFocusListener(adapter);
        dialog.addComponentListener(new ComponentAdapter() {
            public void componentShown(ComponentEvent ce) {
                // reset value to ensure closing works properly
                setValue(JOptionPane.UNINITIALIZED_VALUE);
            }
        });

        addPropertyChangeListener(listener);
    }


    
Brings up an internal confirmation dialog panel. The dialog
is a information-message dialog titled "Message".
Params:
parentComponent – determines the Frame
         in which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the object to display/**
     * Brings up an internal confirmation dialog panel. The dialog
     * is a information-message dialog titled "Message".
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the object to display
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                                 Object message) {
        showInternalMessageDialog(parentComponent, message, UIManager.
                                 getString("OptionPane.messageDialogTitle",
                                 parentComponent), INFORMATION_MESSAGE);
    }

    
Brings up an internal dialog panel that displays a message
using a default icon determined by the messageType
parameter.
Params:
parentComponent – determines the Frame
         in which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the Object to display
title –     the title string for the dialog
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE/**
     * Brings up an internal dialog panel that displays a message
     * using a default icon determined by the <code>messageType</code>
     * parameter.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                                 Object message, String title,
                                                 int messageType) {
        showInternalMessageDialog(parentComponent, message, title, messageType,null);
    }

    
Brings up an internal dialog panel displaying a message,
specifying all parameters.
Params:
parentComponent – determines the Frame
         in which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the Object to display
title –     the title string for the dialog
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
icon –      an icon to display in the dialog that helps the user
                 identify the kind of message that is being displayed/**
     * Brings up an internal dialog panel displaying a message,
     * specifying all parameters.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon      an icon to display in the dialog that helps the user
     *                  identify the kind of message that is being displayed
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                         Object message,
                                         String title, int messageType,
                                         Icon icon){
        showInternalOptionDialog(parentComponent, message, title, DEFAULT_OPTION,
                                 messageType, icon, null, null);
    }

    
Brings up an internal dialog panel with the options Yes, No
and Cancel; with the title, Select an Option.
Params:
parentComponent – determines the Frame in
         which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the Object to display
Returns:
an integer indicating the option selected by the user/**
     * Brings up an internal dialog panel with the options <i>Yes</i>, <i>No</i>
     * and <i>Cancel</i>; with the title, <b>Select an Option</b>.
     *
     * @param parentComponent determines the <code>Frame</code> in
     *          which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @return an integer indicating the option selected by the user
     */
    public static int showInternalConfirmDialog(Component parentComponent,
                                                Object message) {
        return showInternalConfirmDialog(parentComponent, message,
                                 UIManager.getString("OptionPane.titleText"),
                                 YES_NO_CANCEL_OPTION);
    }

    
Brings up a internal dialog panel where the number of choices
is determined by the optionType parameter.
Params:
parentComponent – determines the Frame
         in which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the object to display in the dialog; a
         Component object is rendered as a
         Component; a String
         object is rendered as a string; other objects
         are converted to a String using the
         toString method
title –     the title string for the dialog
optionType – an integer designating the options
         available on the dialog: YES_NO_OPTION,
         or YES_NO_CANCEL_OPTION
Returns:
an integer indicating the option selected by the user/**
     * Brings up a internal dialog panel where the number of choices
     * is determined by the <code>optionType</code> parameter.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the object to display in the dialog; a
     *          <code>Component</code> object is rendered as a
     *          <code>Component</code>; a <code>String</code>
     *          object is rendered as a string; other objects
     *          are converted to a <code>String</code> using the
     *          <code>toString</code> method
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options
     *          available on the dialog: <code>YES_NO_OPTION</code>,
     *          or <code>YES_NO_CANCEL_OPTION</code>
     * @return an integer indicating the option selected by the user
     */
    public static int showInternalConfirmDialog(Component parentComponent,
                                                Object message, String title,
                                                int optionType) {
        return showInternalConfirmDialog(parentComponent, message, title, optionType,
                                         QUESTION_MESSAGE);
    }

    
Brings up an internal dialog panel where the number of choices
is determined by the optionType parameter, where
the messageType parameter determines the icon to display.
The messageType parameter is primarily used to supply
a default icon from the Look and Feel.
Params:
parentComponent – determines the Frame in
         which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the object to display in the dialog; a
         Component object is rendered as a
         Component; a String
         object is rendered as a string; other objects are
         converted to a String using the
         toString method
title –     the title string for the dialog
optionType – an integer designating the options
         available on the dialog:
         YES_NO_OPTION, or YES_NO_CANCEL_OPTION
messageType – an integer designating the kind of message this is,
         primarily used to determine the icon from the
         pluggable Look and Feel: ERROR_MESSAGE,
         INFORMATION_MESSAGE,
         WARNING_MESSAGE, QUESTION_MESSAGE,
         or PLAIN_MESSAGE
Returns:
an integer indicating the option selected by the user/**
     * Brings up an internal dialog panel where the number of choices
     * is determined by the <code>optionType</code> parameter, where
     * the <code>messageType</code> parameter determines the icon to display.
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the Look and Feel.
     *
     * @param parentComponent determines the <code>Frame</code> in
     *          which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the object to display in the dialog; a
     *          <code>Component</code> object is rendered as a
     *          <code>Component</code>; a <code>String</code>
     *          object is rendered as a string; other objects are
     *          converted to a <code>String</code> using the
     *          <code>toString</code> method
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options
     *          available on the dialog:
     *          <code>YES_NO_OPTION</code>, or <code>YES_NO_CANCEL_OPTION</code>
     * @param messageType an integer designating the kind of message this is,
     *          primarily used to determine the icon from the
     *          pluggable Look and Feel: <code>ERROR_MESSAGE</code>,
     *          <code>INFORMATION_MESSAGE</code>,
     *          <code>WARNING_MESSAGE</code>, <code>QUESTION_MESSAGE</code>,
     *          or <code>PLAIN_MESSAGE</code>
     * @return an integer indicating the option selected by the user
     */
    public static int showInternalConfirmDialog(Component parentComponent,
                                        Object message,
                                        String title, int optionType,
                                        int messageType) {
        return showInternalConfirmDialog(parentComponent, message, title, optionType,
                                         messageType, null);
    }

    
Brings up an internal dialog panel with a specified icon, where
the number of choices is determined by the optionType
parameter.
The messageType parameter is primarily used to supply
a default icon from the look and feel.
Params:
parentComponent – determines the Frame
         in which the dialog is displayed; if null,
         or if the parentComponent has no Frame, a
         default Frame is used
message –   the object to display in the dialog; a
         Component object is rendered as a
         Component; a String
         object is rendered as a string; other objects are
         converted to a String using the
         toString method
title –     the title string for the dialog
optionType – an integer designating the options available
         on the dialog:
         YES_NO_OPTION, or
         YES_NO_CANCEL_OPTION.
messageType – an integer designating the kind of message this is,
         primarily used to determine the icon from the pluggable
         Look and Feel: ERROR_MESSAGE,
         INFORMATION_MESSAGE,
         WARNING_MESSAGE, QUESTION_MESSAGE,
         or PLAIN_MESSAGE
icon –      the icon to display in the dialog
Returns:
an integer indicating the option selected by the user/**
     * Brings up an internal dialog panel with a specified icon, where
     * the number of choices is determined by the <code>optionType</code>
     * parameter.
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the parentComponent has no Frame, a
     *          default <code>Frame</code> is used
     * @param message   the object to display in the dialog; a
     *          <code>Component</code> object is rendered as a
     *          <code>Component</code>; a <code>String</code>
     *          object is rendered as a string; other objects are
     *          converted to a <code>String</code> using the
     *          <code>toString</code> method
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available
     *          on the dialog:
     *          <code>YES_NO_OPTION</code>, or
     *          <code>YES_NO_CANCEL_OPTION</code>.
     * @param messageType an integer designating the kind of message this is,
     *          primarily used to determine the icon from the pluggable
     *          Look and Feel: <code>ERROR_MESSAGE</code>,
     *          <code>INFORMATION_MESSAGE</code>,
     *          <code>WARNING_MESSAGE</code>, <code>QUESTION_MESSAGE</code>,
     *          or <code>PLAIN_MESSAGE</code>
     * @param icon      the icon to display in the dialog
     * @return an integer indicating the option selected by the user
     */
    public static int showInternalConfirmDialog(Component parentComponent,
                                        Object message,
                                        String title, int optionType,
                                        int messageType, Icon icon) {
        return showInternalOptionDialog(parentComponent, message, title, optionType,
                                        messageType, icon, null, null);
    }

    
Brings up an internal dialog panel with a specified icon, where
the initial choice is determined by the initialValue
parameter and the number of choices is determined by the
optionType parameter.

If optionType is YES_NO_OPTION, or
YES_NO_CANCEL_OPTION
and the options parameter is null,
then the options are supplied by the Look and Feel.

The messageType parameter is primarily used to supply
a default icon from the look and feel.
Params:
parentComponent – determines the Frame
         in which the dialog is displayed; if null,
         or if the parentComponent has no
         Frame, a default Frame is used
message –   the object to display in the dialog; a
         Component object is rendered as a
         Component; a String
         object is rendered as a string. Other objects are
         converted to a String using the
         toString method
title –     the title string for the dialog
optionType – an integer designating the options available
         on the dialog: YES_NO_OPTION,
         or YES_NO_CANCEL_OPTION
messageType – an integer designating the kind of message this is;
         primarily used to determine the icon from the
         pluggable Look and Feel: ERROR_MESSAGE,
         INFORMATION_MESSAGE,
         WARNING_MESSAGE, QUESTION_MESSAGE,
         or PLAIN_MESSAGE
icon –      the icon to display in the dialog
options –   an array of objects indicating the possible choices
         the user can make; if the objects are components, they
         are rendered properly; non-String
         objects are rendered using their toString
         methods; if this parameter is null,
         the options are determined by the Look and Feel
initialValue – the object that represents the default selection
         for the dialog; only meaningful if options
         is used; can be null
Returns:
an integer indicating the option chosen by the user,
         or CLOSED_OPTION if the user closed the Dialog/**
     * Brings up an internal dialog panel with a specified icon, where
     * the initial choice is determined by the <code>initialValue</code>
     * parameter and the number of choices is determined by the
     * <code>optionType</code> parameter.
     * <p>
     * If <code>optionType</code> is <code>YES_NO_OPTION</code>, or
     * <code>YES_NO_CANCEL_OPTION</code>
     * and the <code>options</code> parameter is <code>null</code>,
     * then the options are supplied by the Look and Feel.
     * <p>
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the object to display in the dialog; a
     *          <code>Component</code> object is rendered as a
     *          <code>Component</code>; a <code>String</code>
     *          object is rendered as a string. Other objects are
     *          converted to a <code>String</code> using the
     *          <code>toString</code> method
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available
     *          on the dialog: <code>YES_NO_OPTION</code>,
     *          or <code>YES_NO_CANCEL_OPTION</code>
     * @param messageType an integer designating the kind of message this is;
     *          primarily used to determine the icon from the
     *          pluggable Look and Feel: <code>ERROR_MESSAGE</code>,
     *          <code>INFORMATION_MESSAGE</code>,
     *          <code>WARNING_MESSAGE</code>, <code>QUESTION_MESSAGE</code>,
     *          or <code>PLAIN_MESSAGE</code>
     * @param icon      the icon to display in the dialog
     * @param options   an array of objects indicating the possible choices
     *          the user can make; if the objects are components, they
     *          are rendered properly; non-<code>String</code>
     *          objects are rendered using their <code>toString</code>
     *          methods; if this parameter is <code>null</code>,
     *          the options are determined by the Look and Feel
     * @param initialValue the object that represents the default selection
     *          for the dialog; only meaningful if <code>options</code>
     *          is used; can be <code>null</code>
     * @return an integer indicating the option chosen by the user,
     *          or <code>CLOSED_OPTION</code> if the user closed the Dialog
     */
    public static int showInternalOptionDialog(Component parentComponent,
                                       Object message,
                                       String title, int optionType,
                                       int messageType, Icon icon,
                                       Object[] options, Object initialValue) {
        JOptionPane pane = new JOptionPane(message, messageType,
                optionType, icon, options, initialValue);
        pane.putClientProperty(PopupFactory_FORCE_HEAVYWEIGHT_POPUP,
                Boolean.TRUE);
        Component fo = KeyboardFocusManager.getCurrentKeyboardFocusManager().
                getFocusOwner();

        pane.setInitialValue(initialValue);

        JInternalFrame dialog =
            pane.createInternalFrame(parentComponent, title);
        pane.selectInitialValue();
        dialog.setVisible(true);

        /* Since all input will be blocked until this dialog is dismissed,
         * make sure its parent containers are visible first (this component
         * is tested below).  This is necessary for JApplets, because
         * because an applet normally isn't made visible until after its
         * start() method returns -- if this method is called from start(),
         * the applet will appear to hang while an invisible modal frame
         * waits for input.
         */
        if (dialog.isVisible() && !dialog.isShowing()) {
            Container parent = dialog.getParent();
            while (parent != null) {
                if (parent.isVisible() == false) {
                    parent.setVisible(true);
                }
                parent = parent.getParent();
            }
        }

        // Use reflection to get Container.startLWModal.
        try {
            Method method = AccessController.doPrivileged(new ModalPrivilegedAction(
                    Container.class, "startLWModal"));
            if (method != null) {
                method.invoke(dialog, (Object[])null);
            }
        } catch (IllegalAccessException ex) {
        } catch (IllegalArgumentException ex) {
        } catch (InvocationTargetException ex) {
        }

        if (parentComponent instanceof JInternalFrame) {
            try {
                ((JInternalFrame)parentComponent).setSelected(true);
            } catch (java.beans.PropertyVetoException e) {
            }
        }

        Object selectedValue = pane.getValue();

        if (fo != null && fo.isShowing()) {
            fo.requestFocus();
        }
        if (selectedValue == null) {
            return CLOSED_OPTION;
        }
        if (options == null) {
            if (selectedValue instanceof Integer) {
                return ((Integer)selectedValue).intValue();
            }
            return CLOSED_OPTION;
        }
        for(int counter = 0, maxCounter = options.length;
            counter < maxCounter; counter++) {
            if (options[counter].equals(selectedValue)) {
                return counter;
            }
        }
        return CLOSED_OPTION;
    }

    
Shows an internal question-message dialog requesting input from
the user parented to parentComponent. The dialog
is displayed in the Component's frame,
and is usually positioned below the Component.
Params:
parentComponent –  the parent Component
         for the dialog
message –  the Object to display/**
     * Shows an internal question-message dialog requesting input from
     * the user parented to <code>parentComponent</code>. The dialog
     * is displayed in the <code>Component</code>'s frame,
     * and is usually positioned below the <code>Component</code>.
     *
     * @param parentComponent  the parent <code>Component</code>
     *          for the dialog
     * @param message  the <code>Object</code> to display
     */
    public static String showInternalInputDialog(Component parentComponent,
                                                 Object message) {
        return showInternalInputDialog(parentComponent, message, UIManager.
               getString("OptionPane.inputDialogTitle", parentComponent),
               QUESTION_MESSAGE);
    }

    
Shows an internal dialog requesting input from the user parented
to parentComponent with the dialog having the title
title and message type messageType.
Params:
parentComponent – the parent Component for the dialog
message –  the Object to display
title –    the String to display in the
         dialog title bar
messageType – the type of message that is to be displayed:
                   ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE,
                   QUESTION_MESSAGE, or PLAIN_MESSAGE/**
     * Shows an internal dialog requesting input from the user parented
     * to <code>parentComponent</code> with the dialog having the title
     * <code>title</code> and message type <code>messageType</code>.
     *
     * @param parentComponent the parent <code>Component</code> for the dialog
     * @param message  the <code>Object</code> to display
     * @param title    the <code>String</code> to display in the
     *          dialog title bar
     * @param messageType the type of message that is to be displayed:
     *                    ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE,
     *                    QUESTION_MESSAGE, or PLAIN_MESSAGE
     */
    public static String showInternalInputDialog(Component parentComponent,
                             Object message, String title, int messageType) {
        return (String)showInternalInputDialog(parentComponent, message, title,
                                       messageType, null, null, null);
    }

    
Prompts the user for input in a blocking internal dialog where
the initial selection, possible selections, and all other
options can be specified. The user will able to choose from
selectionValues, where null
implies the user can input
whatever they wish, usually by means of a JTextField.
initialSelectionValue is the initial value to prompt
the user with. It is up to the UI to decide how best to represent
the selectionValues, but usually a
JComboBox, JList, or
JTextField will be used.
Params:
parentComponent – the parent Component for the dialog
message –  the Object to display
title –    the String to display in the dialog
         title bar
messageType – the type of message to be displayed:
                 ERROR_MESSAGE, INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE, or PLAIN_MESSAGE
icon –     the Icon image to display
selectionValues – an array of Objects that
                 gives the possible selections
initialSelectionValue – the value used to initialize the input
                 field
Returns:
user's input, or null meaning the user
         canceled the input/**
     * Prompts the user for input in a blocking internal dialog where
     * the initial selection, possible selections, and all other
     * options can be specified. The user will able to choose from
     * <code>selectionValues</code>, where <code>null</code>
     * implies the user can input
     * whatever they wish, usually by means of a <code>JTextField</code>.
     * <code>initialSelectionValue</code> is the initial value to prompt
     * the user with. It is up to the UI to decide how best to represent
     * the <code>selectionValues</code>, but usually a
     * <code>JComboBox</code>, <code>JList</code>, or
     * <code>JTextField</code> will be used.
     *
     * @param parentComponent the parent <code>Component</code> for the dialog
     * @param message  the <code>Object</code> to display
     * @param title    the <code>String</code> to display in the dialog
     *          title bar
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>, <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>, or <code>PLAIN_MESSAGE</code>
     * @param icon     the <code>Icon</code> image to display
     * @param selectionValues an array of <code>Objects</code> that
     *                  gives the possible selections
     * @param initialSelectionValue the value used to initialize the input
     *                  field
     * @return user's input, or <code>null</code> meaning the user
     *          canceled the input
     */
    public static Object showInternalInputDialog(Component parentComponent,
            Object message, String title, int messageType, Icon icon,
            Object[] selectionValues, Object initialSelectionValue) {
        JOptionPane pane = new JOptionPane(message, messageType,
                OK_CANCEL_OPTION, icon, null, null);
        pane.putClientProperty(PopupFactory_FORCE_HEAVYWEIGHT_POPUP,
                Boolean.TRUE);
        Component fo = KeyboardFocusManager.getCurrentKeyboardFocusManager().
                getFocusOwner();

        pane.setWantsInput(true);
        pane.setSelectionValues(selectionValues);
        pane.setInitialSelectionValue(initialSelectionValue);

        JInternalFrame dialog =
            pane.createInternalFrame(parentComponent, title);

        pane.selectInitialValue();
        dialog.setVisible(true);

        /* Since all input will be blocked until this dialog is dismissed,
         * make sure its parent containers are visible first (this component
         * is tested below).  This is necessary for JApplets, because
         * because an applet normally isn't made visible until after its
         * start() method returns -- if this method is called from start(),
         * the applet will appear to hang while an invisible modal frame
         * waits for input.
         */
        if (dialog.isVisible() && !dialog.isShowing()) {
            Container parent = dialog.getParent();
            while (parent != null) {
                if (parent.isVisible() == false) {
                    parent.setVisible(true);
                }
                parent = parent.getParent();
            }
        }

        // Use reflection to get Container.startLWModal.
        try {
            Method method = AccessController.doPrivileged(new ModalPrivilegedAction(
                    Container.class, "startLWModal"));
            if (method != null) {
                method.invoke(dialog, (Object[])null);
            }
        } catch (IllegalAccessException ex) {
        } catch (IllegalArgumentException ex) {
        } catch (InvocationTargetException ex) {
        }

        if (parentComponent instanceof JInternalFrame) {
            try {
                ((JInternalFrame)parentComponent).setSelected(true);
            } catch (java.beans.PropertyVetoException e) {
            }
        }

        if (fo != null && fo.isShowing()) {
            fo.requestFocus();
        }
        Object value = pane.getInputValue();

        if (value == UNINITIALIZED_VALUE) {
            return null;
        }
        return value;
    }

    
Creates and returns an instance of JInternalFrame.
The internal frame is created with the specified title,
and wrapping the JOptionPane.
The returned JInternalFrame is
added to the JDesktopPane ancestor of
parentComponent, or components
parent if one its ancestors isn't a JDesktopPane,
or if parentComponent
doesn't have a parent then a RuntimeException is thrown.
Params:
parentComponent –  the parent Component for
         the internal frame
title –    the String to display in the
         frame's title bar
Throws:
RuntimeException – if parentComponent does
         not have a valid parent
Returns:
a JInternalFrame containing a
         JOptionPane/**
     * Creates and returns an instance of <code>JInternalFrame</code>.
     * The internal frame is created with the specified title,
     * and wrapping the <code>JOptionPane</code>.
     * The returned <code>JInternalFrame</code> is
     * added to the <code>JDesktopPane</code> ancestor of
     * <code>parentComponent</code>, or components
     * parent if one its ancestors isn't a <code>JDesktopPane</code>,
     * or if <code>parentComponent</code>
     * doesn't have a parent then a <code>RuntimeException</code> is thrown.
     *
     * @param parentComponent  the parent <code>Component</code> for
     *          the internal frame
     * @param title    the <code>String</code> to display in the
     *          frame's title bar
     * @return a <code>JInternalFrame</code> containing a
     *          <code>JOptionPane</code>
     * @exception RuntimeException if <code>parentComponent</code> does
     *          not have a valid parent
     */
    public JInternalFrame createInternalFrame(Component parentComponent,
                                 String title) {
        Container parent =
                JOptionPane.getDesktopPaneForComponent(parentComponent);

        if (parent == null && (parentComponent == null ||
                (parent = parentComponent.getParent()) == null)) {
            throw new RuntimeException("JOptionPane: parentComponent does " +
                    "not have a valid parent");
        }

        // Option dialogs should be closable only
        final JInternalFrame  iFrame = new JInternalFrame(title, false, true,
                                                           false, false);

        iFrame.putClientProperty("JInternalFrame.frameType", "optionDialog");
        iFrame.putClientProperty("JInternalFrame.messageType",
                                 Integer.valueOf(getMessageType()));

        iFrame.addInternalFrameListener(new InternalFrameAdapter() {
            public void internalFrameClosing(InternalFrameEvent e) {
                if (getValue() == UNINITIALIZED_VALUE) {
                    setValue(null);
                }
            }
        });
        addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                // Let the defaultCloseOperation handle the closing
                // if the user closed the iframe without selecting a button
                // (newValue = null in that case).  Otherwise, close the dialog.
                if (iFrame.isVisible() &&
                        event.getSource() == JOptionPane.this &&
                        event.getPropertyName().equals(VALUE_PROPERTY)) {
                // Use reflection to get Container.stopLWModal().
                try {
                    Method method = AccessController.doPrivileged(
                        new ModalPrivilegedAction(
                            Container.class, "stopLWModal"));
                    if (method != null) {
                        method.invoke(iFrame, (Object[])null);
                    }
                } catch (IllegalAccessException ex) {
                } catch (IllegalArgumentException ex) {
                } catch (InvocationTargetException ex) {
                }

                try {
                    iFrame.setClosed(true);
                }
                catch (java.beans.PropertyVetoException e) {
                }

                iFrame.setVisible(false);
                }
            }
        });
        iFrame.getContentPane().add(this, BorderLayout.CENTER);
        if (parent instanceof JDesktopPane) {
            parent.add(iFrame, JLayeredPane.MODAL_LAYER);
        } else {
            parent.add(iFrame, BorderLayout.CENTER);
        }
        Dimension iFrameSize = iFrame.getPreferredSize();
        Dimension rootSize = parent.getSize();
        Dimension parentSize = parentComponent.getSize();

        iFrame.setBounds((rootSize.width - iFrameSize.width) / 2,
                         (rootSize.height - iFrameSize.height) / 2,
                         iFrameSize.width, iFrameSize.height);
        // We want dialog centered relative to its parent component
        Point iFrameCoord =
          SwingUtilities.convertPoint(parentComponent, 0, 0, parent);
        int x = (parentSize.width - iFrameSize.width) / 2 + iFrameCoord.x;
        int y = (parentSize.height - iFrameSize.height) / 2 + iFrameCoord.y;

        // If possible, dialog should be fully visible
        int ovrx = x + iFrameSize.width - rootSize.width;
        int ovry = y + iFrameSize.height - rootSize.height;
        x = Math.max((ovrx > 0? x - ovrx: x), 0);
        y = Math.max((ovry > 0? y - ovry: y), 0);
        iFrame.setBounds(x, y, iFrameSize.width, iFrameSize.height);

        parent.validate();
        try {
            iFrame.setSelected(true);
        } catch (java.beans.PropertyVetoException e) {}

        return iFrame;
    }

    
Returns the specified component's Frame.
Params:
parentComponent – the Component to check for a
         Frame
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
getRootFrame
GraphicsEnvironment.isHeadless
Returns:
the Frame that contains the component,
         or getRootFrame
         if the component is null,
         or does not have a valid Frame parent/**
     * Returns the specified component's <code>Frame</code>.
     *
     * @param parentComponent the <code>Component</code> to check for a
     *          <code>Frame</code>
     * @return the <code>Frame</code> that contains the component,
     *          or <code>getRootFrame</code>
     *          if the component is <code>null</code>,
     *          or does not have a valid <code>Frame</code> parent
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see #getRootFrame
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static Frame getFrameForComponent(Component parentComponent)
        throws HeadlessException {
        if (parentComponent == null)
            return getRootFrame();
        if (parentComponent instanceof Frame)
            return (Frame)parentComponent;
        return JOptionPane.getFrameForComponent(parentComponent.getParent());
    }

    
Returns the specified component's toplevel Frame or
Dialog.
Params:
parentComponent – the Component to check for a
         Frame or Dialog
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
GraphicsEnvironment.isHeadless
Returns:
the Frame or Dialog that
         contains the component, or the default
         frame if the component is null,
         or does not have a valid
         Frame or Dialog parent/**
     * Returns the specified component's toplevel <code>Frame</code> or
     * <code>Dialog</code>.
     *
     * @param parentComponent the <code>Component</code> to check for a
     *          <code>Frame</code> or <code>Dialog</code>
     * @return the <code>Frame</code> or <code>Dialog</code> that
     *          contains the component, or the default
     *          frame if the component is <code>null</code>,
     *          or does not have a valid
     *          <code>Frame</code> or <code>Dialog</code> parent
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    static Window getWindowForComponent(Component parentComponent)
        throws HeadlessException {
        if (parentComponent == null)
            return getRootFrame();
        if (parentComponent instanceof Frame || parentComponent instanceof Dialog)
            return (Window)parentComponent;
        return JOptionPane.getWindowForComponent(parentComponent.getParent());
    }


    
Returns the specified component's desktop pane.
Params:
parentComponent – the Component to check for a
         desktop
Returns:
the JDesktopPane that contains the component,
         or null if the component is null
         or does not have an ancestor that is a
         JInternalFrame/**
     * Returns the specified component's desktop pane.
     *
     * @param parentComponent the <code>Component</code> to check for a
     *          desktop
     * @return the <code>JDesktopPane</code> that contains the component,
     *          or <code>null</code> if the component is <code>null</code>
     *          or does not have an ancestor that is a
     *          <code>JInternalFrame</code>
     */
    public static JDesktopPane getDesktopPaneForComponent(Component parentComponent) {
        if(parentComponent == null)
            return null;
        if(parentComponent instanceof JDesktopPane)
            return (JDesktopPane)parentComponent;
        return getDesktopPaneForComponent(parentComponent.getParent());
    }

    private static final Object sharedFrameKey = JOptionPane.class;

    
Sets the frame to use for class methods in which a frame is
not provided.

Note:
It is recommended that rather than using this method you supply a valid parent.
Params:
newRootFrame – the default Frame to use/**
     * Sets the frame to use for class methods in which a frame is
     * not provided.
     * <p>
     * <strong>Note:</strong>
     * It is recommended that rather than using this method you supply a valid parent.
     *
     * @param newRootFrame the default <code>Frame</code> to use
     */
    public static void setRootFrame(Frame newRootFrame) {
        if (newRootFrame != null) {
            SwingUtilities.appContextPut(sharedFrameKey, newRootFrame);
        } else {
            SwingUtilities.appContextRemove(sharedFrameKey);
        }
    }

    
Returns the Frame to use for the class methods in
which a frame is not provided.
Throws:
HeadlessException – if
  GraphicsEnvironment.isHeadless returns
  true
See Also:
setRootFrame
GraphicsEnvironment.isHeadless
Returns:
the default Frame to use/**
     * Returns the <code>Frame</code> to use for the class methods in
     * which a frame is not provided.
     *
     * @return the default <code>Frame</code> to use
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see #setRootFrame
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static Frame getRootFrame() throws HeadlessException {
        Frame sharedFrame =
            (Frame)SwingUtilities.appContextGet(sharedFrameKey);
        if (sharedFrame == null) {
            sharedFrame = SwingUtilities.getSharedOwnerFrame();
            SwingUtilities.appContextPut(sharedFrameKey, sharedFrame);
        }
        return sharedFrame;
    }

    
Creates a JOptionPane with a test message.
/**
     * Creates a <code>JOptionPane</code> with a test message.
     */
    public JOptionPane() {
        this("JOptionPane message");
    }

    
Creates a instance of JOptionPane to display a
message using the
plain-message message type and the default options delivered by
the UI.
Params:
message – the Object to display/**
     * Creates a instance of <code>JOptionPane</code> to display a
     * message using the
     * plain-message message type and the default options delivered by
     * the UI.
     *
     * @param message the <code>Object</code> to display
     */
    public JOptionPane(Object message) {
        this(message, PLAIN_MESSAGE);
    }

    
Creates an instance of JOptionPane to display a message
with the specified message type and the default options,
Params:
message – the Object to display
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE/**
     * Creates an instance of <code>JOptionPane</code> to display a message
     * with the specified message type and the default options,
     *
     * @param message the <code>Object</code> to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     */
    public JOptionPane(Object message, int messageType) {
        this(message, messageType, DEFAULT_OPTION);
    }

    
Creates an instance of JOptionPane to display a message
with the specified message type and options.
Params:
message – the Object to display
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
optionType – the options to display in the pane:
                 DEFAULT_OPTION, YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 OK_CANCEL_OPTION/**
     * Creates an instance of <code>JOptionPane</code> to display a message
     * with the specified message type and options.
     *
     * @param message the <code>Object</code> to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param optionType the options to display in the pane:
     *                  <code>DEFAULT_OPTION</code>, <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  <code>OK_CANCEL_OPTION</code>
     */
    public JOptionPane(Object message, int messageType, int optionType) {
        this(message, messageType, optionType, null);
    }

    
Creates an instance of JOptionPane to display a message
with the specified message type, options, and icon.
Params:
message – the Object to display
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
optionType – the options to display in the pane:
                 DEFAULT_OPTION, YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 OK_CANCEL_OPTION
icon – the Icon image to display/**
     * Creates an instance of <code>JOptionPane</code> to display a message
     * with the specified message type, options, and icon.
     *
     * @param message the <code>Object</code> to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param optionType the options to display in the pane:
     *                  <code>DEFAULT_OPTION</code>, <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  <code>OK_CANCEL_OPTION</code>
     * @param icon the <code>Icon</code> image to display
     */
    public JOptionPane(Object message, int messageType, int optionType,
                       Icon icon) {
        this(message, messageType, optionType, icon, null);
    }

    
Creates an instance of JOptionPane to display a message
with the specified message type, icon, and options.
None of the options is initially selected.

The options objects should contain either instances of
Components, (which are added directly) or
Strings (which are wrapped in a JButton).
If you provide Components, you must ensure that when the
Component is clicked it messages setValue
in the created JOptionPane.
Params:
message – the Object to display
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
optionType – the options to display in the pane:
                 DEFAULT_OPTION,
                 YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 OK_CANCEL_OPTION
icon – the Icon image to display
options –  the choices the user can select/**
     * Creates an instance of <code>JOptionPane</code> to display a message
     * with the specified message type, icon, and options.
     * None of the options is initially selected.
     * <p>
     * The options objects should contain either instances of
     * <code>Component</code>s, (which are added directly) or
     * <code>Strings</code> (which are wrapped in a <code>JButton</code>).
     * If you provide <code>Component</code>s, you must ensure that when the
     * <code>Component</code> is clicked it messages <code>setValue</code>
     * in the created <code>JOptionPane</code>.
     *
     * @param message the <code>Object</code> to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param optionType the options to display in the pane:
     *                  <code>DEFAULT_OPTION</code>,
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  <code>OK_CANCEL_OPTION</code>
     * @param icon the <code>Icon</code> image to display
     * @param options  the choices the user can select
     */
    public JOptionPane(Object message, int messageType, int optionType,
                       Icon icon, Object[] options) {
        this(message, messageType, optionType, icon, options, null);
    }

    
Creates an instance of JOptionPane to display a message
with the specified message type, icon, and options, with the
initially-selected option specified.
Params:
message – the Object to display
messageType – the type of message to be displayed:
                 ERROR_MESSAGE,
                 INFORMATION_MESSAGE,
                 WARNING_MESSAGE,
                 QUESTION_MESSAGE,
                 or PLAIN_MESSAGE
optionType – the options to display in the pane:
                 DEFAULT_OPTION,
                 YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 OK_CANCEL_OPTION
icon – the Icon image to display
options –  the choices the user can select
initialValue – the choice that is initially selected; if
                 null, then nothing will be initially selected;
                 only meaningful if options is used/**
     * Creates an instance of <code>JOptionPane</code> to display a message
     * with the specified message type, icon, and options, with the
     * initially-selected option specified.
     *
     * @param message the <code>Object</code> to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param optionType the options to display in the pane:
     *                  <code>DEFAULT_OPTION</code>,
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  <code>OK_CANCEL_OPTION</code>
     * @param icon the Icon image to display
     * @param options  the choices the user can select
     * @param initialValue the choice that is initially selected; if
     *                  <code>null</code>, then nothing will be initially selected;
     *                  only meaningful if <code>options</code> is used
     */
    public JOptionPane(Object message, int messageType, int optionType,
                       Icon icon, Object[] options, Object initialValue) {

        this.message = message;
        this.options = options;
        this.initialValue = initialValue;
        this.icon = icon;
        setMessageType(messageType);
        setOptionType(optionType);
        value = UNINITIALIZED_VALUE;
        inputValue = UNINITIALIZED_VALUE;
        updateUI();
    }

    
Sets the UI object which implements the L&F for this component. 
Params:
ui –  the OptionPaneUI L&F object
See Also:
UIDefaults.getUI
@beaninfo

      bound: true
     hidden: true
description: The UI object that implements the optionpane's LookAndFeel/**
     * Sets the UI object which implements the {@literal L&F} for this component.
     *
     * @param ui  the <code>OptionPaneUI</code> {@literal L&F} object
     * @see UIDefaults#getUI
     * @beaninfo
     *       bound: true
     *      hidden: true
     * description: The UI object that implements the optionpane's LookAndFeel
     */
    public void setUI(OptionPaneUI ui) {
        if (this.ui != ui) {
            super.setUI(ui);
            invalidate();
        }
    }

    
Returns the UI object which implements the L&F for this component. 
Returns:
the OptionPaneUI object/**
     * Returns the UI object which implements the {@literal L&F} for this component.
     *
     * @return the <code>OptionPaneUI</code> object
     */
    public OptionPaneUI getUI() {
        return (OptionPaneUI)ui;
    }

    
Notification from the UIManager that the L&F has changed. Replaces the current UI object with the latest version from the UIManager.
See Also:
JComponent.updateUI/**
     * Notification from the <code>UIManager</code> that the {@literal L&F} has changed.
     * Replaces the current UI object with the latest version from the
     * <code>UIManager</code>.
     *
     * @see JComponent#updateUI
     */
    public void updateUI() {
        setUI((OptionPaneUI)UIManager.getUI(this));
    }


    
Returns the name of the UI class that implements the L&F for this component. 
See Also:
JComponent.getUIClassID
UIDefaults.getUI
Returns:
the string "OptionPaneUI"/**
     * Returns the name of the UI class that implements the
     * {@literal L&F} for this component.
     *
     * @return the string "OptionPaneUI"
     * @see JComponent#getUIClassID
     * @see UIDefaults#getUI
     */
    public String getUIClassID() {
        return uiClassID;
    }


    
Sets the option pane's message-object.
Params:
newMessage – the Object to display
See Also:
getMessage
@beaninfo

  preferred: true
  bound: true
description: The optionpane's message object./**
     * Sets the option pane's message-object.
     * @param newMessage the <code>Object</code> to display
     * @see #getMessage
     *
     * @beaninfo
     *   preferred: true
     *   bound: true
     * description: The optionpane's message object.
     */
    public void setMessage(Object newMessage) {
        Object           oldMessage = message;

        message = newMessage;
        firePropertyChange(MESSAGE_PROPERTY, oldMessage, message);
    }

    
Returns the message-object this pane displays.
See Also:
setMessage
Returns:
the Object that is displayed/**
     * Returns the message-object this pane displays.
     * @see #setMessage
     *
     * @return the <code>Object</code> that is displayed
     */
    public Object getMessage() {
        return message;
    }

    
Sets the icon to display. If non-null, the look and feel
does not provide an icon.
Params:
newIcon – the Icon to display
See Also:
getIcon
@beaninfo

  preferred: true
      bound: true
description: The option pane's type icon./**
     * Sets the icon to display. If non-<code>null</code>, the look and feel
     * does not provide an icon.
     * @param newIcon the <code>Icon</code> to display
     *
     * @see #getIcon
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's type icon.
     */
    public void setIcon(Icon newIcon) {
        Object              oldIcon = icon;

        icon = newIcon;
        firePropertyChange(ICON_PROPERTY, oldIcon, icon);
    }

    
Returns the icon this pane displays.
See Also:
setIcon
Returns:
the Icon that is displayed/**
     * Returns the icon this pane displays.
     * @return the <code>Icon</code> that is displayed
     *
     * @see #setIcon
     */
    public Icon getIcon() {
        return icon;
    }

    
Sets the value the user has chosen.
Params:
newValue –  the chosen value
See Also:
getValue
@beaninfo

  preferred: true
      bound: true
description: The option pane's value object./**
     * Sets the value the user has chosen.
     * @param newValue  the chosen value
     *
     * @see #getValue
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's value object.
     */
    public void setValue(Object newValue) {
        Object               oldValue = value;

        value = newValue;
        firePropertyChange(VALUE_PROPERTY, oldValue, value);
    }

    
Returns the value the user has selected. UNINITIALIZED_VALUE
implies the user has not yet made a choice, null means the
user closed the window with out choosing anything. Otherwise
the returned value will be one of the options defined in this
object.
See Also:
setValue
Returns:
the Object chosen by the user,
        UNINITIALIZED_VALUE
        if the user has not yet made a choice, or null if
        the user closed the window without making a choice/**
     * Returns the value the user has selected. <code>UNINITIALIZED_VALUE</code>
     * implies the user has not yet made a choice, <code>null</code> means the
     * user closed the window with out choosing anything. Otherwise
     * the returned value will be one of the options defined in this
     * object.
     *
     * @return the <code>Object</code> chosen by the user,
     *         <code>UNINITIALIZED_VALUE</code>
     *         if the user has not yet made a choice, or <code>null</code> if
     *         the user closed the window without making a choice
     *
     * @see #setValue
     */
    public Object getValue() {
        return value;
    }

    
Sets the options this pane displays. If an element in
newOptions is a Component
it is added directly to the pane,
otherwise a button is created for the element.
Params:
newOptions – an array of Objects that create the
         buttons the user can click on, or arbitrary
         Components to add to the pane
See Also:
getOptions
@beaninfo

      bound: true
description: The option pane's options objects./**
     * Sets the options this pane displays. If an element in
     * <code>newOptions</code> is a <code>Component</code>
     * it is added directly to the pane,
     * otherwise a button is created for the element.
     *
     * @param newOptions an array of <code>Objects</code> that create the
     *          buttons the user can click on, or arbitrary
     *          <code>Components</code> to add to the pane
     *
     * @see #getOptions
     * @beaninfo
     *       bound: true
     * description: The option pane's options objects.
     */
    public void setOptions(Object[] newOptions) {
        Object[]           oldOptions = options;

        options = newOptions;
        firePropertyChange(OPTIONS_PROPERTY, oldOptions, options);
    }

    
Returns the choices the user can make.
See Also:
setOptions
Returns:
the array of Objects that give the user's choices/**
     * Returns the choices the user can make.
     * @return the array of <code>Objects</code> that give the user's choices
     *
     * @see #setOptions
     */
    public Object[] getOptions() {
        if(options != null) {
            int             optionCount = options.length;
            Object[]        retOptions = new Object[optionCount];

            System.arraycopy(options, 0, retOptions, 0, optionCount);
            return retOptions;
        }
        return options;
    }

    
Sets the initial value that is to be enabled -- the
Component
that has the focus when the pane is initially displayed.
Params:
newInitialValue – the Object that gets the initial
                        keyboard focus
See Also:
getInitialValue
@beaninfo

  preferred: true
      bound: true
description: The option pane's initial value object./**
     * Sets the initial value that is to be enabled -- the
     * <code>Component</code>
     * that has the focus when the pane is initially displayed.
     *
     * @param newInitialValue the <code>Object</code> that gets the initial
     *                         keyboard focus
     *
     * @see #getInitialValue
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's initial value object.
     */
    public void setInitialValue(Object newInitialValue) {
        Object            oldIV = initialValue;

        initialValue = newInitialValue;
        firePropertyChange(INITIAL_VALUE_PROPERTY, oldIV, initialValue);
    }

    
Returns the initial value.
See Also:
setInitialValue
Returns:
the Object that gets the initial keyboard focus/**
     * Returns the initial value.
     *
     * @return the <code>Object</code> that gets the initial keyboard focus
     *
     * @see #setInitialValue
     */
    public Object getInitialValue() {
        return initialValue;
    }

    
Sets the option pane's message type.
The message type is used by the Look and Feel to determine the
icon to display (if not supplied) as well as potentially how to
lay out the parentComponent.
Params:
newType – an integer specifying the kind of message to display:
               ERROR_MESSAGE, INFORMATION_MESSAGE,
               WARNING_MESSAGE,
               QUESTION_MESSAGE, or PLAIN_MESSAGE
Throws:
RuntimeException – if newType is not one of the
         legal values listed above
See Also:
getMessageType
@beaninfo

  preferred: true
      bound: true
description: The option pane's message type./**
     * Sets the option pane's message type.
     * The message type is used by the Look and Feel to determine the
     * icon to display (if not supplied) as well as potentially how to
     * lay out the <code>parentComponent</code>.
     * @param newType an integer specifying the kind of message to display:
     *                <code>ERROR_MESSAGE</code>, <code>INFORMATION_MESSAGE</code>,
     *                <code>WARNING_MESSAGE</code>,
     *                <code>QUESTION_MESSAGE</code>, or <code>PLAIN_MESSAGE</code>
     * @exception RuntimeException if <code>newType</code> is not one of the
     *          legal values listed above

     * @see #getMessageType
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's message type.
     */
    public void setMessageType(int newType) {
        if(newType != ERROR_MESSAGE && newType != INFORMATION_MESSAGE &&
           newType != WARNING_MESSAGE && newType != QUESTION_MESSAGE &&
           newType != PLAIN_MESSAGE)
            throw new RuntimeException("JOptionPane: type must be one of JOptionPane.ERROR_MESSAGE, JOptionPane.INFORMATION_MESSAGE, JOptionPane.WARNING_MESSAGE, JOptionPane.QUESTION_MESSAGE or JOptionPane.PLAIN_MESSAGE");

        int           oldType = messageType;

        messageType = newType;
        firePropertyChange(MESSAGE_TYPE_PROPERTY, oldType, messageType);
    }

    
Returns the message type.
See Also:
setMessageType
Returns:
an integer specifying the message type/**
     * Returns the message type.
     *
     * @return an integer specifying the message type
     *
     * @see #setMessageType
     */
    public int getMessageType() {
        return messageType;
    }

    
Sets the options to display.
The option type is used by the Look and Feel to
determine what buttons to show (unless options are supplied).
Params:
newType – an integer specifying the options the L&F is to display: DEFAULT_OPTION,
                 YES_NO_OPTION,
                 YES_NO_CANCEL_OPTION,
                 or OK_CANCEL_OPTION
Throws:
RuntimeException – if newType is not one of
         the legal values listed above
See Also:
getOptionType
setOptions
@beaninfo

  preferred: true
      bound: true
description: The option pane's option type./**
     * Sets the options to display.
     * The option type is used by the Look and Feel to
     * determine what buttons to show (unless options are supplied).
     * @param newType an integer specifying the options the {@literal L&F} is to display:
     *                  <code>DEFAULT_OPTION</code>,
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @exception RuntimeException if <code>newType</code> is not one of
     *          the legal values listed above
     *
     * @see #getOptionType
     * @see #setOptions
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's option type.
      */
    public void setOptionType(int newType) {
        if(newType != DEFAULT_OPTION && newType != YES_NO_OPTION &&
           newType != YES_NO_CANCEL_OPTION && newType != OK_CANCEL_OPTION)
            throw new RuntimeException("JOptionPane: option type must be one of JOptionPane.DEFAULT_OPTION, JOptionPane.YES_NO_OPTION, JOptionPane.YES_NO_CANCEL_OPTION or JOptionPane.OK_CANCEL_OPTION");

        int            oldType = optionType;

        optionType = newType;
        firePropertyChange(OPTION_TYPE_PROPERTY, oldType, optionType);
    }

    
Returns the type of options that are displayed.
See Also:
setOptionType
Returns:
an integer specifying the user-selectable options/**
     * Returns the type of options that are displayed.
     *
     * @return an integer specifying the user-selectable options
     *
     * @see #setOptionType
     */
    public int getOptionType() {
        return optionType;
    }

    
Sets the input selection values for a pane that provides the user
with a list of items to choose from. (The UI provides a widget
for choosing one of the values.)  A null value
implies the user can input whatever they wish, usually by means
of a JTextField.

Sets wantsInput to true. Use
setInitialSelectionValue to specify the initially-chosen
value. After the pane as been enabled, inputValue is
set to the value the user has selected.
Params:
newValues – an array of Objects the user to be
                 displayed
                 (usually in a list or combo-box) from which
                 the user can make a selection
See Also:
setWantsInput
setInitialSelectionValue
getSelectionValues
@beaninfo

      bound: true
description: The option pane's selection values./**
     * Sets the input selection values for a pane that provides the user
     * with a list of items to choose from. (The UI provides a widget
     * for choosing one of the values.)  A <code>null</code> value
     * implies the user can input whatever they wish, usually by means
     * of a <code>JTextField</code>.
     * <p>
     * Sets <code>wantsInput</code> to true. Use
     * <code>setInitialSelectionValue</code> to specify the initially-chosen
     * value. After the pane as been enabled, <code>inputValue</code> is
     * set to the value the user has selected.
     * @param newValues an array of <code>Objects</code> the user to be
     *                  displayed
     *                  (usually in a list or combo-box) from which
     *                  the user can make a selection
     * @see #setWantsInput
     * @see #setInitialSelectionValue
     * @see #getSelectionValues
     * @beaninfo
     *       bound: true
     * description: The option pane's selection values.
     */
    public void setSelectionValues(Object[] newValues) {
        Object[]           oldValues = selectionValues;

        selectionValues = newValues;
        firePropertyChange(SELECTION_VALUES_PROPERTY, oldValues, newValues);
        if(selectionValues != null)
            setWantsInput(true);
    }

    
Returns the input selection values.
See Also:
setSelectionValues
Returns:
the array of Objects the user can select/**
     * Returns the input selection values.
     *
     * @return the array of <code>Objects</code> the user can select
     * @see #setSelectionValues
     */
    public Object[] getSelectionValues() {
        return selectionValues;
    }

    
Sets the input value that is initially displayed as selected to the user.
Only used if wantsInput is true.
Params:
newValue – the initially selected value
See Also:
setSelectionValues
getInitialSelectionValue
@beaninfo

      bound: true
description: The option pane's initial selection value object./**
     * Sets the input value that is initially displayed as selected to the user.
     * Only used if <code>wantsInput</code> is true.
     * @param newValue the initially selected value
     * @see #setSelectionValues
     * @see #getInitialSelectionValue
     * @beaninfo
     *       bound: true
     * description: The option pane's initial selection value object.
     */
    public void setInitialSelectionValue(Object newValue) {
        Object          oldValue = initialSelectionValue;

        initialSelectionValue = newValue;
        firePropertyChange(INITIAL_SELECTION_VALUE_PROPERTY, oldValue,
                           newValue);
    }

    
Returns the input value that is displayed as initially selected to the user.
See Also:
setInitialSelectionValue
setSelectionValues
Returns:
the initially selected value/**
     * Returns the input value that is displayed as initially selected to the user.
     *
     * @return the initially selected value
     * @see #setInitialSelectionValue
     * @see #setSelectionValues
     */
    public Object getInitialSelectionValue() {
        return initialSelectionValue;
    }

    
Sets the input value that was selected or input by the user.
Only used if wantsInput is true.  Note that this method
is invoked internally by the option pane (in response to user action)
and should generally not be called by client programs.  To set the
input value initially displayed as selected to the user, use
setInitialSelectionValue.
Params:
newValue – the Object used to set the
         value that the user specified (usually in a text field)
See Also:
setSelectionValues
setInitialSelectionValue
setWantsInput
getInputValue
@beaninfo

  preferred: true
      bound: true
description: The option pane's input value object./**
     * Sets the input value that was selected or input by the user.
     * Only used if <code>wantsInput</code> is true.  Note that this method
     * is invoked internally by the option pane (in response to user action)
     * and should generally not be called by client programs.  To set the
     * input value initially displayed as selected to the user, use
     * <code>setInitialSelectionValue</code>.
     *
     * @param newValue the <code>Object</code> used to set the
     *          value that the user specified (usually in a text field)
     * @see #setSelectionValues
     * @see #setInitialSelectionValue
     * @see #setWantsInput
     * @see #getInputValue
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's input value object.
     */
    public void setInputValue(Object newValue) {
        Object              oldValue = inputValue;

        inputValue = newValue;
        firePropertyChange(INPUT_VALUE_PROPERTY, oldValue, newValue);
    }

    
Returns the value the user has input, if wantsInput
is true.
See Also:
setSelectionValues
setWantsInput
setInputValue
Returns:
the Object the user specified,
         if it was one of the objects, or a
         String if it was a value typed into a
         field/**
     * Returns the value the user has input, if <code>wantsInput</code>
     * is true.
     *
     * @return the <code>Object</code> the user specified,
     *          if it was one of the objects, or a
     *          <code>String</code> if it was a value typed into a
     *          field
     * @see #setSelectionValues
     * @see #setWantsInput
     * @see #setInputValue
     */
    public Object getInputValue() {
        return inputValue;
    }

    
Returns the maximum number of characters to place on a line in a
message. Default is to return Integer.MAX_VALUE.
The value can be
changed by overriding this method in a subclass.
Returns:
an integer giving the maximum number of characters on a line/**
     * Returns the maximum number of characters to place on a line in a
     * message. Default is to return <code>Integer.MAX_VALUE</code>.
     * The value can be
     * changed by overriding this method in a subclass.
     *
     * @return an integer giving the maximum number of characters on a line
     */
    public int getMaxCharactersPerLineCount() {
        return Integer.MAX_VALUE;
    }

    
Sets the wantsInput property.
If newValue is true, an input component
(such as a text field or combo box) whose parent is
parentComponent is provided to
allow the user to input a value. If getSelectionValues
returns a non-null array, the input value is one of the
objects in that array. Otherwise the input value is whatever
the user inputs.

This is a bound property.
See Also:
setSelectionValues
setInputValue
@beaninfo

  preferred: true
      bound: true
description: Flag which allows the user to input a value./**
     * Sets the <code>wantsInput</code> property.
     * If <code>newValue</code> is true, an input component
     * (such as a text field or combo box) whose parent is
     * <code>parentComponent</code> is provided to
     * allow the user to input a value. If <code>getSelectionValues</code>
     * returns a non-<code>null</code> array, the input value is one of the
     * objects in that array. Otherwise the input value is whatever
     * the user inputs.
     * <p>
     * This is a bound property.
     *
     * @see #setSelectionValues
     * @see #setInputValue
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: Flag which allows the user to input a value.
     */
    public void setWantsInput(boolean newValue) {
        boolean            oldValue = wantsInput;

        wantsInput = newValue;
        firePropertyChange(WANTS_INPUT_PROPERTY, oldValue, newValue);
    }

    
Returns the value of the wantsInput property.
See Also:
setWantsInput
Returns:
true if an input component will be provided/**
     * Returns the value of the <code>wantsInput</code> property.
     *
     * @return true if an input component will be provided
     * @see #setWantsInput
     */
    public boolean getWantsInput() {
        return wantsInput;
    }

    
Requests that the initial value be selected, which will set
focus to the initial value. This method
should be invoked after the window containing the option pane
is made visible.
/**
     * Requests that the initial value be selected, which will set
     * focus to the initial value. This method
     * should be invoked after the window containing the option pane
     * is made visible.
     */
    public void selectInitialValue() {
        OptionPaneUI         ui = getUI();
        if (ui != null) {
            ui.selectInitialValue(this);
        }
    }


    private static int styleFromMessageType(int messageType) {
        switch (messageType) {
        case ERROR_MESSAGE:
            return JRootPane.ERROR_DIALOG;
        case QUESTION_MESSAGE:
            return JRootPane.QUESTION_DIALOG;
        case WARNING_MESSAGE:
            return JRootPane.WARNING_DIALOG;
        case INFORMATION_MESSAGE:
            return JRootPane.INFORMATION_DIALOG;
        case PLAIN_MESSAGE:
        default:
            return JRootPane.PLAIN_DIALOG;
        }
    }

    // Serialization support.
    private void writeObject(ObjectOutputStream s) throws IOException {
        Vector<Object> values = new Vector<Object>();

        s.defaultWriteObject();
        // Save the icon, if its Serializable.
        if(icon != null && icon instanceof Serializable) {
            values.addElement("icon");
            values.addElement(icon);
        }
        // Save the message, if its Serializable.
        if(message != null && message instanceof Serializable) {
            values.addElement("message");
            values.addElement(message);
        }
        // Save the treeModel, if its Serializable.
        if(options != null) {
            Vector<Object> serOptions = new Vector<Object>();

            for(int counter = 0, maxCounter = options.length;
                counter < maxCounter; counter++)
                if(options[counter] instanceof Serializable)
                    serOptions.addElement(options[counter]);
            if(serOptions.size() > 0) {
                int             optionCount = serOptions.size();
                Object[]        arrayOptions = new Object[optionCount];

                serOptions.copyInto(arrayOptions);
                values.addElement("options");
                values.addElement(arrayOptions);
            }
        }
        // Save the initialValue, if its Serializable.
        if(initialValue != null && initialValue instanceof Serializable) {
            values.addElement("initialValue");
            values.addElement(initialValue);
        }
        // Save the value, if its Serializable.
        if(value != null && value instanceof Serializable) {
            values.addElement("value");
            values.addElement(value);
        }
        // Save the selectionValues, if its Serializable.
        if(selectionValues != null) {
            boolean            serialize = true;

            for(int counter = 0, maxCounter = selectionValues.length;
                counter < maxCounter; counter++) {
                if(selectionValues[counter] != null &&
                   !(selectionValues[counter] instanceof Serializable)) {
                    serialize = false;
                    break;
                }
            }
            if(serialize) {
                values.addElement("selectionValues");
                values.addElement(selectionValues);
            }
        }
        // Save the inputValue, if its Serializable.
        if(inputValue != null && inputValue instanceof Serializable) {
            values.addElement("inputValue");
            values.addElement(inputValue);
        }
        // Save the initialSelectionValue, if its Serializable.
        if(initialSelectionValue != null &&
           initialSelectionValue instanceof Serializable) {
            values.addElement("initialSelectionValue");
            values.addElement(initialSelectionValue);
        }
        s.writeObject(values);
    }

    private void readObject(ObjectInputStream s)
        throws IOException, ClassNotFoundException {
        s.defaultReadObject();

        Vector          values = (Vector)s.readObject();
        int             indexCounter = 0;
        int             maxCounter = values.size();

        if(indexCounter < maxCounter && values.elementAt(indexCounter).
           equals("icon")) {
            icon = (Icon)values.elementAt(++indexCounter);
            indexCounter++;
        }
        if(indexCounter < maxCounter && values.elementAt(indexCounter).
           equals("message")) {
            message = values.elementAt(++indexCounter);
            indexCounter++;
        }
        if(indexCounter < maxCounter && values.elementAt(indexCounter).
           equals("options")) {
            options = (Object[])values.elementAt(++indexCounter);
            indexCounter++;
        }
        if(indexCounter < maxCounter && values.elementAt(indexCounter).
           equals("initialValue")) {
            initialValue = values.elementAt(++indexCounter);
            indexCounter++;
        }
        if(indexCounter < maxCounter && values.elementAt(indexCounter).
           equals("value")) {
            value = values.elementAt(++indexCounter);
            indexCounter++;
        }
        if(indexCounter < maxCounter && values.elementAt(indexCounter).
           equals("selectionValues")) {
            selectionValues = (Object[])values.elementAt(++indexCounter);
            indexCounter++;
        }
        if(indexCounter < maxCounter && values.elementAt(indexCounter).
           equals("inputValue")) {
            inputValue = values.elementAt(++indexCounter);
            indexCounter++;
        }
        if(indexCounter < maxCounter && values.elementAt(indexCounter).
           equals("initialSelectionValue")) {
            initialSelectionValue = values.elementAt(++indexCounter);
            indexCounter++;
        }
        if (getUIClassID().equals(uiClassID)) {
            byte count = JComponent.getWriteObjCounter(this);
            JComponent.setWriteObjCounter(this, --count);
            if (count == 0 && ui != null) {
                ui.installUI(this);
            }
        }
    }


    
Returns a string representation of this JOptionPane.
This method
is intended to be used only for debugging purposes, and the
content and format of the returned string may vary between
implementations. The returned string may be empty but may not
be null.
Returns:
 a string representation of this JOptionPane/**
     * Returns a string representation of this <code>JOptionPane</code>.
     * This method
     * is intended to be used only for debugging purposes, and the
     * content and format of the returned string may vary between
     * implementations. The returned string may be empty but may not
     * be <code>null</code>.
     *
     * @return  a string representation of this <code>JOptionPane</code>
     */
    protected String paramString() {
        String iconString = (icon != null ?
                             icon.toString() : "");
        String initialValueString = (initialValue != null ?
                                     initialValue.toString() : "");
        String messageString = (message != null ?
                                message.toString() : "");
        String messageTypeString;
        if (messageType == ERROR_MESSAGE) {
            messageTypeString = "ERROR_MESSAGE";
        } else if (messageType == INFORMATION_MESSAGE) {
            messageTypeString = "INFORMATION_MESSAGE";
        } else if (messageType == WARNING_MESSAGE) {
            messageTypeString = "WARNING_MESSAGE";
        } else if (messageType == QUESTION_MESSAGE) {
            messageTypeString = "QUESTION_MESSAGE";
        } else if (messageType == PLAIN_MESSAGE)  {
            messageTypeString = "PLAIN_MESSAGE";
        } else messageTypeString = "";
        String optionTypeString;
        if (optionType == DEFAULT_OPTION) {
            optionTypeString = "DEFAULT_OPTION";
        } else if (optionType == YES_NO_OPTION) {
            optionTypeString = "YES_NO_OPTION";
        } else if (optionType == YES_NO_CANCEL_OPTION) {
            optionTypeString = "YES_NO_CANCEL_OPTION";
        } else if (optionType == OK_CANCEL_OPTION) {
            optionTypeString = "OK_CANCEL_OPTION";
        } else optionTypeString = "";
        String wantsInputString = (wantsInput ?
                                   "true" : "false");

        return super.paramString() +
        ",icon=" + iconString +
        ",initialValue=" + initialValueString +
        ",message=" + messageString +
        ",messageType=" + messageTypeString +
        ",optionType=" + optionTypeString +
        ",wantsInput=" + wantsInputString;
    }

    
Retrieves a method from the provided class and makes it accessible.
/**
     * Retrieves a method from the provided class and makes it accessible.
     */
    private static class ModalPrivilegedAction implements PrivilegedAction<Method> {
        private Class<?> clazz;
        private String methodName;

        public ModalPrivilegedAction(Class<?> clazz, String methodName) {
            this.clazz = clazz;
            this.methodName = methodName;
        }

        public Method run() {
            Method method = null;
            try {
                method = clazz.getDeclaredMethod(methodName, (Class[])null);
            } catch (NoSuchMethodException ex) {
            }
            if (method != null) {
                method.setAccessible(true);
            }
            return method;
        }
    }



///////////////////
// Accessibility support
///////////////////

    
Returns the AccessibleContext associated with this JOptionPane.
For option panes, the AccessibleContext takes the form of an
AccessibleJOptionPane.
A new AccessibleJOptionPane instance is created if necessary.
Returns:
an AccessibleJOptionPane that serves as the
        AccessibleContext of this AccessibleJOptionPane
@beaninfo

      expert: true
 description: The AccessibleContext associated with this option pane/**
     * Returns the <code>AccessibleContext</code> associated with this JOptionPane.
     * For option panes, the <code>AccessibleContext</code> takes the form of an
     * <code>AccessibleJOptionPane</code>.
     * A new <code>AccessibleJOptionPane</code> instance is created if necessary.
     *
     * @return an AccessibleJOptionPane that serves as the
     *         AccessibleContext of this AccessibleJOptionPane
     * @beaninfo
     *       expert: true
     *  description: The AccessibleContext associated with this option pane
     */
    public AccessibleContext getAccessibleContext() {
        if (accessibleContext == null) {
            accessibleContext = new AccessibleJOptionPane();
        }
        return accessibleContext;
    }

    
This class implements accessibility support for the
JOptionPane class.  It provides an implementation of the
Java Accessibility API appropriate to option pane user-interface
elements.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans™
has been added to the java.beans package. Please see XMLEncoder. /**
     * This class implements accessibility support for the
     * <code>JOptionPane</code> class.  It provides an implementation of the
     * Java Accessibility API appropriate to option pane user-interface
     * elements.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases. The current serialization support is
     * appropriate for short term storage or RMI between applications running
     * the same version of Swing.  As of 1.4, support for long term storage
     * of all JavaBeans&trade;
     * has been added to the <code>java.beans</code> package.
     * Please see {@link java.beans.XMLEncoder}.
     */
    protected class AccessibleJOptionPane extends AccessibleJComponent {

        
Get the role of this object.
See Also:
AccessibleRole
Returns:
an instance of AccessibleRole describing the role of the object/**
         * Get the role of this object.
         *
         * @return an instance of AccessibleRole describing the role of the object
         * @see AccessibleRole
         */
        public AccessibleRole getAccessibleRole() {
            switch (messageType) {
            case ERROR_MESSAGE:
            case INFORMATION_MESSAGE:
            case WARNING_MESSAGE:
                return AccessibleRole.ALERT;

            default:
                return AccessibleRole.OPTION_PANE;
            }
        }

    } // inner class AccessibleJOptionPane
}