/*
 * Copyright (c) 1997, 2016, 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 javax.swing.event.*;
import javax.swing.filechooser.*;
import javax.swing.filechooser.FileFilter;
import javax.swing.plaf.FileChooserUI;

import javax.accessibility.*;

import java.io.*;

import java.util.Vector;
import java.awt.AWTEvent;
import java.awt.Component;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Window;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.awt.EventQueue;
import java.awt.Toolkit;
import java.awt.event.*;
import java.beans.JavaBean;
import java.beans.BeanProperty;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.lang.ref.WeakReference;

JFileChooser provides a simple mechanism for the user to
choose a file.
For information about using JFileChooser, see
How to Use File Choosers,
a section in The Java Tutorial.

The following code pops up a file chooser for the user's home directory that
sees only .jpg and .gif images:
   JFileChooser chooser = new JFileChooser();
   FileNameExtensionFilter filter = new FileNameExtensionFilter(
       "JPG & GIF Images", "jpg", "gif");
   chooser.setFileFilter(filter);
   int returnVal = chooser.showOpenDialog(parent);
   if(returnVal == JFileChooser.APPROVE_OPTION) {
      System.out.println("You chose to open this file: " +
           chooser.getSelectedFile().getName());
   }


Warning: Swing is not thread safe. For more
information see Swing's Threading
Policy.
Author:
Jeff Dinkins
Since:
1.2/**
 * <code>JFileChooser</code> provides a simple mechanism for the user to
 * choose a file.
 * For information about using <code>JFileChooser</code>, see
 * <a
 href="http://docs.oracle.com/javase/tutorial/uiswing/components/filechooser.html">How to Use File Choosers</a>,
 * a section in <em>The Java Tutorial</em>.
 *
 * <p>
 *
 * The following code pops up a file chooser for the user's home directory that
 * sees only .jpg and .gif images:
 * <pre>
 *    JFileChooser chooser = new JFileChooser();
 *    FileNameExtensionFilter filter = new FileNameExtensionFilter(
 *        "JPG &amp; GIF Images", "jpg", "gif");
 *    chooser.setFileFilter(filter);
 *    int returnVal = chooser.showOpenDialog(parent);
 *    if(returnVal == JFileChooser.APPROVE_OPTION) {
 *       System.out.println("You chose to open this file: " +
 *            chooser.getSelectedFile().getName());
 *    }
 * </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>.
 *
 * @author Jeff Dinkins
 * @since 1.2
 */
@JavaBean(defaultProperty = "UI", description = "A component which allows for the interactive selection of a file.")
@SwingContainer(false)
@SuppressWarnings("serial") // Superclass is not serializable across versions
public class JFileChooser extends JComponent implements Accessible {

    
See Also:
getUIClassID
readObject/**
     * @see #getUIClassID
     * @see #readObject
     */
    private static final String uiClassID = "FileChooserUI";

    // ************************
    // ***** Dialog Types *****
    // ************************

    
Type value indicating that the JFileChooser supports an
"Open" file operation.
/**
     * Type value indicating that the <code>JFileChooser</code> supports an
     * "Open" file operation.
     */
    public static final int OPEN_DIALOG = 0;

    
Type value indicating that the JFileChooser supports a
"Save" file operation.
/**
     * Type value indicating that the <code>JFileChooser</code> supports a
     * "Save" file operation.
     */
    public static final int SAVE_DIALOG = 1;

    
Type value indicating that the JFileChooser supports a
developer-specified file operation.
/**
     * Type value indicating that the <code>JFileChooser</code> supports a
     * developer-specified file operation.
     */
    public static final int CUSTOM_DIALOG = 2;


    // ********************************
    // ***** Dialog Return Values *****
    // ********************************

    
Return value if cancel is chosen.
/**
     * Return value if cancel is chosen.
     */
    public static final int CANCEL_OPTION = 1;

    
Return value if approve (yes, ok) is chosen.
/**
     * Return value if approve (yes, ok) is chosen.
     */
    public static final int APPROVE_OPTION = 0;

    
Return value if an error occurred.
/**
     * Return value if an error occurred.
     */
    public static final int ERROR_OPTION = -1;


    // **********************************
    // ***** JFileChooser properties *****
    // **********************************


    
Instruction to display only files. /** Instruction to display only files. */
    public static final int FILES_ONLY = 0;

    
Instruction to display only directories. /** Instruction to display only directories. */
    public static final int DIRECTORIES_ONLY = 1;

    
Instruction to display both files and directories. /** Instruction to display both files and directories. */
    public static final int FILES_AND_DIRECTORIES = 2;

    
Instruction to cancel the current selection. /** Instruction to cancel the current selection. */
    public static final String CANCEL_SELECTION = "CancelSelection";

    
Instruction to approve the current selection
(same as pressing yes or ok).
/**
     * Instruction to approve the current selection
     * (same as pressing yes or ok).
     */
    public static final String APPROVE_SELECTION = "ApproveSelection";

    
Identifies change in the text on the approve (yes, ok) button. /** Identifies change in the text on the approve (yes, ok) button. */
    public static final String APPROVE_BUTTON_TEXT_CHANGED_PROPERTY = "ApproveButtonTextChangedProperty";

    
Identifies change in the tooltip text for the approve (yes, ok)
button.
/**
     * Identifies change in the tooltip text for the approve (yes, ok)
     * button.
     */
    public static final String APPROVE_BUTTON_TOOL_TIP_TEXT_CHANGED_PROPERTY = "ApproveButtonToolTipTextChangedProperty";

    
Identifies change in the mnemonic for the approve (yes, ok) button. /** Identifies change in the mnemonic for the approve (yes, ok) button. */
    public static final String APPROVE_BUTTON_MNEMONIC_CHANGED_PROPERTY = "ApproveButtonMnemonicChangedProperty";

    
Instruction to display the control buttons. /** Instruction to display the control buttons. */
    public static final String CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY = "ControlButtonsAreShownChangedProperty";

    
Identifies user's directory change. /** Identifies user's directory change. */
    public static final String DIRECTORY_CHANGED_PROPERTY = "directoryChanged";

    
Identifies change in user's single-file selection. /** Identifies change in user's single-file selection. */
    public static final String SELECTED_FILE_CHANGED_PROPERTY = "SelectedFileChangedProperty";

    
Identifies change in user's multiple-file selection. /** Identifies change in user's multiple-file selection. */
    public static final String SELECTED_FILES_CHANGED_PROPERTY = "SelectedFilesChangedProperty";

    
Enables multiple-file selections. /** Enables multiple-file selections. */
    public static final String MULTI_SELECTION_ENABLED_CHANGED_PROPERTY = "MultiSelectionEnabledChangedProperty";

    
Says that a different object is being used to find available drives
on the system.
/**
     * Says that a different object is being used to find available drives
     * on the system.
     */
    public static final String FILE_SYSTEM_VIEW_CHANGED_PROPERTY = "FileSystemViewChanged";

    
Says that a different object is being used to retrieve file
information.
/**
     * Says that a different object is being used to retrieve file
     * information.
     */
    public static final String FILE_VIEW_CHANGED_PROPERTY = "fileViewChanged";

    
Identifies a change in the display-hidden-files property. /** Identifies a change in the display-hidden-files property. */
    public static final String FILE_HIDING_CHANGED_PROPERTY = "FileHidingChanged";

    
User changed the kind of files to display. /** User changed the kind of files to display. */
    public static final String FILE_FILTER_CHANGED_PROPERTY = "fileFilterChanged";

    
Identifies a change in the kind of selection (single,
multiple, etc.).
/**
     * Identifies a change in the kind of selection (single,
     * multiple, etc.).
     */
    public static final String FILE_SELECTION_MODE_CHANGED_PROPERTY = "fileSelectionChanged";

    
Says that a different accessory component is in use
(for example, to preview files).
/**
     * Says that a different accessory component is in use
     * (for example, to preview files).
     */
    public static final String ACCESSORY_CHANGED_PROPERTY = "AccessoryChangedProperty";

    
Identifies whether a the AcceptAllFileFilter is used or not.
/**
     * Identifies whether a the AcceptAllFileFilter is used or not.
     */
    public static final String ACCEPT_ALL_FILE_FILTER_USED_CHANGED_PROPERTY = "acceptAllFileFilterUsedChanged";

    
Identifies a change in the dialog title. /** Identifies a change in the dialog title. */
    public static final String DIALOG_TITLE_CHANGED_PROPERTY = "DialogTitleChangedProperty";

    
Identifies a change in the type of files displayed (files only,
directories only, or both files and directories).
/**
     * Identifies a change in the type of files displayed (files only,
     * directories only, or both files and directories).
     */
    public static final String DIALOG_TYPE_CHANGED_PROPERTY = "DialogTypeChangedProperty";

    
Identifies a change in the list of predefined file filters
the user can choose from.
/**
     * Identifies a change in the list of predefined file filters
     * the user can choose from.
     */
    public static final String CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY = "ChoosableFileFilterChangedProperty";

    // ******************************
    // ***** instance variables *****
    // ******************************

    private String dialogTitle = null;
    private String approveButtonText = null;
    private String approveButtonToolTipText = null;
    private int approveButtonMnemonic = 0;

    private Vector<FileFilter> filters = new Vector<FileFilter>(5);
    private JDialog dialog = null;
    private int dialogType = OPEN_DIALOG;
    private int returnValue = ERROR_OPTION;
    private JComponent accessory = null;

    private FileView fileView = null;

    private boolean controlsShown = true;

    private boolean useFileHiding = true;
    private static final String SHOW_HIDDEN_PROP = "awt.file.showHiddenFiles";

    // Listens to changes in the native setting for showing hidden files.
    // The Listener is removed and the native setting is ignored if
    // setFileHidingEnabled() is ever called.
    private transient PropertyChangeListener showFilesListener = null;

    private int fileSelectionMode = FILES_ONLY;

    private boolean multiSelectionEnabled = false;

    private boolean useAcceptAllFileFilter = true;

    private boolean dragEnabled = false;

    private FileFilter fileFilter = null;

    private FileSystemView fileSystemView = null;

    private File currentDirectory = null;
    private File selectedFile = null;
    private File[] selectedFiles;

    // *************************************
    // ***** JFileChooser Constructors *****
    // *************************************

    
Constructs a JFileChooser pointing to the user's
default directory. This default depends on the operating system.
It is typically the "My Documents" folder on Windows, and the
user's home directory on Unix.
/**
     * Constructs a <code>JFileChooser</code> pointing to the user's
     * default directory. This default depends on the operating system.
     * It is typically the "My Documents" folder on Windows, and the
     * user's home directory on Unix.
     */
    public JFileChooser() {
        this((File) null, (FileSystemView) null);
    }

    
Constructs a JFileChooser using the given path.
Passing in a null
string causes the file chooser to point to the user's default directory.
This default depends on the operating system. It is
typically the "My Documents" folder on Windows, and the user's
home directory on Unix.
Params:
currentDirectoryPath –  a String giving the path
                         to a file or directory/**
     * Constructs a <code>JFileChooser</code> using the given path.
     * Passing in a <code>null</code>
     * string causes the file chooser to point to the user's default directory.
     * This default depends on the operating system. It is
     * typically the "My Documents" folder on Windows, and the user's
     * home directory on Unix.
     *
     * @param currentDirectoryPath  a <code>String</code> giving the path
     *                          to a file or directory
     */
    public JFileChooser(String currentDirectoryPath) {
        this(currentDirectoryPath, (FileSystemView) null);
    }

    
Constructs a JFileChooser using the given File
as the path. Passing in a null file
causes the file chooser to point to the user's default directory.
This default depends on the operating system. It is
typically the "My Documents" folder on Windows, and the user's
home directory on Unix.
Params:
currentDirectory –  a File object specifying
                         the path to a file or directory/**
     * Constructs a <code>JFileChooser</code> using the given <code>File</code>
     * as the path. Passing in a <code>null</code> file
     * causes the file chooser to point to the user's default directory.
     * This default depends on the operating system. It is
     * typically the "My Documents" folder on Windows, and the user's
     * home directory on Unix.
     *
     * @param currentDirectory  a <code>File</code> object specifying
     *                          the path to a file or directory
     */
    public JFileChooser(File currentDirectory) {
        this(currentDirectory, (FileSystemView) null);
    }

    
Constructs a JFileChooser using the given
FileSystemView.
Params:
fsv – a FileSystemView/**
     * Constructs a <code>JFileChooser</code> using the given
     * <code>FileSystemView</code>.
     *
     * @param fsv a {@code FileSystemView}
     */
    public JFileChooser(FileSystemView fsv) {
        this((File) null, fsv);
    }


    
Constructs a JFileChooser using the given current directory
and FileSystemView.
Params:
currentDirectory – a File object specifying the path to a file or directory
fsv – a FileSystemView/**
     * Constructs a <code>JFileChooser</code> using the given current directory
     * and <code>FileSystemView</code>.
     *
     * @param currentDirectory a {@code File} object specifying the path to a
     *                         file or directory
     * @param fsv a {@code FileSystemView}
     */
    public JFileChooser(File currentDirectory, FileSystemView fsv) {
        setup(fsv);
        setCurrentDirectory(currentDirectory);
    }

    
Constructs a JFileChooser using the given current directory
path and FileSystemView.
Params:
currentDirectoryPath – a String specifying the path to a file or directory
fsv – a FileSystemView/**
     * Constructs a <code>JFileChooser</code> using the given current directory
     * path and <code>FileSystemView</code>.
     *
     * @param currentDirectoryPath a {@code String} specifying the path to a file
     *                             or directory
     * @param fsv a {@code FileSystemView}
     */
    public JFileChooser(String currentDirectoryPath, FileSystemView fsv) {
        setup(fsv);
        if(currentDirectoryPath == null) {
            setCurrentDirectory(null);
        } else {
            setCurrentDirectory(fileSystemView.createFileObject(currentDirectoryPath));
        }
    }

    
Performs common constructor initialization and setup.
Params:
view – the FileSystemView used for setup/**
     * Performs common constructor initialization and setup.
     *
     * @param view the {@code FileSystemView} used for setup
     */
    protected void setup(FileSystemView view) {
        installShowFilesListener();
        installHierarchyListener();

        if(view == null) {
            view = FileSystemView.getFileSystemView();
        }
        setFileSystemView(view);
        updateUI();
        if(isAcceptAllFileFilterUsed()) {
            setFileFilter(getAcceptAllFileFilter());
        }
        enableEvents(AWTEvent.MOUSE_EVENT_MASK);
    }

    private void installHierarchyListener() {
        addHierarchyListener(new FCHierarchyListener());
    }

    private void installShowFilesListener() {
        // Track native setting for showing hidden files
        Toolkit tk = Toolkit.getDefaultToolkit();
        Object showHiddenProperty = tk.getDesktopProperty(SHOW_HIDDEN_PROP);
        if (showHiddenProperty instanceof Boolean) {
            useFileHiding = !((Boolean)showHiddenProperty).booleanValue();
            showFilesListener = new WeakPCL(this);
            tk.addPropertyChangeListener(SHOW_HIDDEN_PROP, showFilesListener);
        }
    }

    
Sets the dragEnabled property,
which must be true to enable
automatic drag handling (the first part of drag and drop)
on this component.
The transferHandler property needs to be set
to a non-null value for the drag to do
anything.  The default value of the dragEnabled
property
is false.

When automatic drag handling is enabled,
most look and feels begin a drag-and-drop operation
whenever the user presses the mouse button over an item
and then moves the mouse a few pixels.
Setting this property to true
can therefore have a subtle effect on
how selections behave.

Some look and feels might not support automatic drag and drop;
they will ignore this property.  You can work around such
look and feels by modifying the component
to directly call the exportAsDrag method of a
TransferHandler.
Params:
b – the value to set the dragEnabled property to
Throws:
HeadlessException – if
           b is true and
           GraphicsEnvironment.isHeadless()
           returns true
See Also:
GraphicsEnvironment.isHeadless
getDragEnabled
JComponent.setTransferHandler
TransferHandler
Since:
1.4/**
     * Sets the <code>dragEnabled</code> property,
     * which must be <code>true</code> to enable
     * automatic drag handling (the first part of drag and drop)
     * on this component.
     * The <code>transferHandler</code> property needs to be set
     * to a non-<code>null</code> value for the drag to do
     * anything.  The default value of the <code>dragEnabled</code>
     * property
     * is <code>false</code>.
     *
     * <p>
     *
     * When automatic drag handling is enabled,
     * most look and feels begin a drag-and-drop operation
     * whenever the user presses the mouse button over an item
     * and then moves the mouse a few pixels.
     * Setting this property to <code>true</code>
     * can therefore have a subtle effect on
     * how selections behave.
     *
     * <p>
     *
     * Some look and feels might not support automatic drag and drop;
     * they will ignore this property.  You can work around such
     * look and feels by modifying the component
     * to directly call the <code>exportAsDrag</code> method of a
     * <code>TransferHandler</code>.
     *
     * @param b the value to set the <code>dragEnabled</code> property to
     * @exception HeadlessException if
     *            <code>b</code> is <code>true</code> and
     *            <code>GraphicsEnvironment.isHeadless()</code>
     *            returns <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @see #getDragEnabled
     * @see #setTransferHandler
     * @see TransferHandler
     * @since 1.4
     */
    @BeanProperty(bound = false, description
            = "determines whether automatic drag handling is enabled")
    public void setDragEnabled(boolean b) {
        checkDragEnabled(b);
        dragEnabled = b;
    }

    private static void checkDragEnabled(boolean b) {
        if (b && GraphicsEnvironment.isHeadless()) {
            throw new HeadlessException();
        }
    }

    
Gets the value of the dragEnabled property.
See Also:
setDragEnabled
Returns:
 the value of the dragEnabled property
Since:
1.4/**
     * Gets the value of the <code>dragEnabled</code> property.
     *
     * @return  the value of the <code>dragEnabled</code> property
     * @see #setDragEnabled
     * @since 1.4
     */
    public boolean getDragEnabled() {
        return dragEnabled;
    }

    // *****************************
    // ****** File Operations ******
    // *****************************

    
Returns the selected file. This can be set either by the
programmer via setSelectedFile or by a user action, such as
either typing the filename into the UI or selecting the
file from a list in the UI.
See Also:
setSelectedFile
Returns:
the selected file/**
     * Returns the selected file. This can be set either by the
     * programmer via <code>setSelectedFile</code> or by a user action, such as
     * either typing the filename into the UI or selecting the
     * file from a list in the UI.
     *
     * @see #setSelectedFile
     * @return the selected file
     */
    public File getSelectedFile() {
        return selectedFile;
    }

    
Sets the selected file. If the file's parent directory is
not the current directory, changes the current directory
to be the file's parent directory.
Params:
file – the selected file
See Also:
getSelectedFile/**
     * Sets the selected file. If the file's parent directory is
     * not the current directory, changes the current directory
     * to be the file's parent directory.
     *
     * @see #getSelectedFile
     *
     * @param file the selected file
     */
    @BeanProperty(preferred = true)
    public void setSelectedFile(File file) {
        File oldValue = selectedFile;
        selectedFile = file;
        if(selectedFile != null) {
            if (file.isAbsolute() && !getFileSystemView().isParent(getCurrentDirectory(), selectedFile)) {
                setCurrentDirectory(selectedFile.getParentFile());
            }
            if (!isMultiSelectionEnabled() || selectedFiles == null || selectedFiles.length == 1) {
                ensureFileIsVisible(selectedFile);
            }
        }
        firePropertyChange(SELECTED_FILE_CHANGED_PROPERTY, oldValue, selectedFile);
    }

    
Returns a list of selected files if the file chooser is
set to allow multiple selection.
Returns:
an array of selected Files/**
     * Returns a list of selected files if the file chooser is
     * set to allow multiple selection.
     *
     * @return an array of selected {@code File}s
     */
    public File[] getSelectedFiles() {
        if(selectedFiles == null) {
            return new File[0];
        } else {
            return selectedFiles.clone();
        }
    }

    
Sets the list of selected files if the file chooser is
set to allow multiple selection.
Params:
selectedFiles – an array Files to be selected/**
     * Sets the list of selected files if the file chooser is
     * set to allow multiple selection.
     *
     * @param selectedFiles an array {@code File}s to be selected
     */
    @BeanProperty(description
            = "The list of selected files if the chooser is in multiple selection mode.")
    public void setSelectedFiles(File[] selectedFiles) {
        File[] oldValue = this.selectedFiles;
        if (selectedFiles == null || selectedFiles.length == 0) {
            selectedFiles = null;
            this.selectedFiles = null;
            setSelectedFile(null);
        } else {
            this.selectedFiles = selectedFiles.clone();
            setSelectedFile(this.selectedFiles[0]);
        }
        firePropertyChange(SELECTED_FILES_CHANGED_PROPERTY, oldValue, selectedFiles);
    }

    
Returns the current directory.
See Also:
setCurrentDirectory
Returns:
the current directory/**
     * Returns the current directory.
     *
     * @return the current directory
     * @see #setCurrentDirectory
     */
    public File getCurrentDirectory() {
        return currentDirectory;
    }

    
Sets the current directory. Passing in null sets the
file chooser to point to the user's default directory.
This default depends on the operating system. It is
typically the "My Documents" folder on Windows, and the user's
home directory on Unix.
If the file passed in as currentDirectory is not a
directory, the parent of the file will be used as the currentDirectory.
If the parent is not traversable, then it will walk up the parent tree
until it finds a traversable directory, or hits the root of the
file system.
Params:
dir – the current directory to point to
See Also:
getCurrentDirectory/**
     * Sets the current directory. Passing in <code>null</code> sets the
     * file chooser to point to the user's default directory.
     * This default depends on the operating system. It is
     * typically the "My Documents" folder on Windows, and the user's
     * home directory on Unix.
     *
     * If the file passed in as <code>currentDirectory</code> is not a
     * directory, the parent of the file will be used as the currentDirectory.
     * If the parent is not traversable, then it will walk up the parent tree
     * until it finds a traversable directory, or hits the root of the
     * file system.
     *
     * @param dir the current directory to point to
     * @see #getCurrentDirectory
     */
    @BeanProperty(preferred = true, description
            = "The directory that the JFileChooser is showing files of.")
    public void setCurrentDirectory(File dir) {
        File oldValue = currentDirectory;

        if (dir != null && !dir.exists()) {
            dir = currentDirectory;
        }
        if (dir == null) {
            dir = getFileSystemView().getDefaultDirectory();
        }
        if (currentDirectory != null) {
            /* Verify the toString of object */
            if (this.currentDirectory.equals(dir)) {
                return;
            }
        }

        File prev = null;
        while (!isTraversable(dir) && prev != dir) {
            prev = dir;
            dir = getFileSystemView().getParentDirectory(dir);
        }
        currentDirectory = dir;

        firePropertyChange(DIRECTORY_CHANGED_PROPERTY, oldValue, currentDirectory);
    }

    
Changes the directory to be set to the parent of the
current directory.
See Also:
getCurrentDirectory/**
     * Changes the directory to be set to the parent of the
     * current directory.
     *
     * @see #getCurrentDirectory
     */
    public void changeToParentDirectory() {
        selectedFile = null;
        File oldValue = getCurrentDirectory();
        setCurrentDirectory(getFileSystemView().getParentDirectory(oldValue));
    }

    
Tells the UI to rescan its files list from the current directory.
/**
     * Tells the UI to rescan its files list from the current directory.
     */
    public void rescanCurrentDirectory() {
        getUI().rescanCurrentDirectory(this);
    }

    
Makes sure that the specified file is viewable, and
not hidden.
Params:
f –  a File object/**
     * Makes sure that the specified file is viewable, and
     * not hidden.
     *
     * @param f  a File object
     */
    public void ensureFileIsVisible(File f) {
        getUI().ensureFileIsVisible(this, f);
    }

    // **************************************
    // ***** JFileChooser Dialog methods *****
    // **************************************

    
Pops up an "Open File" file chooser dialog. Note that the
text that appears in the approve button is determined by
the L&F.
Params:
parent –  the parent component of the dialog,
                 can be null;
                 see showDialog for details
Throws:
HeadlessException – if GraphicsEnvironment.isHeadless()
returns true.
See Also:
GraphicsEnvironment.isHeadless
showDialog
Returns:
  the return state of the file chooser on popdown:

JFileChooser.CANCEL_OPTION
JFileChooser.APPROVE_OPTION
JFileChooser.ERROR_OPTION if an error occurs or the
                 dialog is dismissed
/**
     * Pops up an "Open File" file chooser dialog. Note that the
     * text that appears in the approve button is determined by
     * the L&amp;F.
     *
     * @param    parent  the parent component of the dialog,
     *                  can be <code>null</code>;
     *                  see <code>showDialog</code> for details
     * @return   the return state of the file chooser on popdown:
     * <ul>
     * <li>JFileChooser.CANCEL_OPTION
     * <li>JFileChooser.APPROVE_OPTION
     * <li>JFileChooser.ERROR_OPTION if an error occurs or the
     *                  dialog is dismissed
     * </ul>
     * @exception HeadlessException if GraphicsEnvironment.isHeadless()
     * returns true.
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @see #showDialog
     */
    public int showOpenDialog(Component parent) throws HeadlessException {
        setDialogType(OPEN_DIALOG);
        return showDialog(parent, null);
    }

    
Pops up a "Save File" file chooser dialog. Note that the
text that appears in the approve button is determined by
the L&F.
Params:
parent –  the parent component of the dialog,
                 can be null;
                 see showDialog for details
Throws:
HeadlessException – if GraphicsEnvironment.isHeadless()
returns true.
See Also:
GraphicsEnvironment.isHeadless
showDialog
Returns:
  the return state of the file chooser on popdown:

JFileChooser.CANCEL_OPTION
JFileChooser.APPROVE_OPTION
JFileChooser.ERROR_OPTION if an error occurs or the
                 dialog is dismissed
/**
     * Pops up a "Save File" file chooser dialog. Note that the
     * text that appears in the approve button is determined by
     * the L&amp;F.
     *
     * @param    parent  the parent component of the dialog,
     *                  can be <code>null</code>;
     *                  see <code>showDialog</code> for details
     * @return   the return state of the file chooser on popdown:
     * <ul>
     * <li>JFileChooser.CANCEL_OPTION
     * <li>JFileChooser.APPROVE_OPTION
     * <li>JFileChooser.ERROR_OPTION if an error occurs or the
     *                  dialog is dismissed
     * </ul>
     * @exception HeadlessException if GraphicsEnvironment.isHeadless()
     * returns true.
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @see #showDialog
     */
    public int showSaveDialog(Component parent) throws HeadlessException {
        setDialogType(SAVE_DIALOG);
        return showDialog(parent, null);
    }

    
Pops a custom file chooser dialog with a custom approve button.
For example, the following code
pops up a file chooser with a "Run Application" button
(instead of the normal "Save" or "Open" button):
filechooser.showDialog(parentFrame, "Run Application");

Alternatively, the following code does the same thing:
   JFileChooser chooser = new JFileChooser(null);
   chooser.setApproveButtonText("Run Application");
   chooser.showDialog(parentFrame, null);




The parent argument determines two things:
the frame on which the open dialog depends and
the component whose position the look and feel
should consider when placing the dialog.  If the parent
is a Frame object (such as a JFrame)
then the dialog depends on the frame and
the look and feel positions the dialog
relative to the frame (for example, centered over the frame).
If the parent is a component, then the dialog
depends on the frame containing the component,
and is positioned relative to the component
(for example, centered over the component).
If the parent is null, then the dialog depends on
no visible window, and it's placed in a
look-and-feel-dependent position
such as the center of the screen.
Params:
parent –  the parent component of the dialog;
                 can be null
approveButtonText – the text of the ApproveButton
Throws:
HeadlessException – if GraphicsEnvironment.isHeadless()
returns true.
See Also:
GraphicsEnvironment.isHeadless
Returns:
 the return state of the file chooser on popdown:

JFileChooser.CANCEL_OPTION
JFileChooser.APPROVE_OPTION
JFileChooser.ERROR_OPTION if an error occurs or the
                 dialog is dismissed
/**
     * Pops a custom file chooser dialog with a custom approve button.
     * For example, the following code
     * pops up a file chooser with a "Run Application" button
     * (instead of the normal "Save" or "Open" button):
     * <pre>
     * filechooser.showDialog(parentFrame, "Run Application");
     * </pre>
     *
     * Alternatively, the following code does the same thing:
     * <pre>
     *    JFileChooser chooser = new JFileChooser(null);
     *    chooser.setApproveButtonText("Run Application");
     *    chooser.showDialog(parentFrame, null);
     * </pre>
     *
     * <!--PENDING(jeff) - the following method should be added to the api:
     *      showDialog(Component parent);-->
     * <!--PENDING(kwalrath) - should specify modality and what
     *      "depends" means.-->
     *
     * <p>
     *
     * The <code>parent</code> argument determines two things:
     * the frame on which the open dialog depends and
     * the component whose position the look and feel
     * should consider when placing the dialog.  If the parent
     * is a <code>Frame</code> object (such as a <code>JFrame</code>)
     * then the dialog depends on the frame and
     * the look and feel positions the dialog
     * relative to the frame (for example, centered over the frame).
     * If the parent is a component, then the dialog
     * depends on the frame containing the component,
     * and is positioned relative to the component
     * (for example, centered over the component).
     * If the parent is <code>null</code>, then the dialog depends on
     * no visible window, and it's placed in a
     * look-and-feel-dependent position
     * such as the center of the screen.
     *
     * @param   parent  the parent component of the dialog;
     *                  can be <code>null</code>
     * @param   approveButtonText the text of the <code>ApproveButton</code>
     * @return  the return state of the file chooser on popdown:
     * <ul>
     * <li>JFileChooser.CANCEL_OPTION
     * <li>JFileChooser.APPROVE_OPTION
     * <li>JFileChooser.ERROR_OPTION if an error occurs or the
     *                  dialog is dismissed
     * </ul>
     * @exception HeadlessException if GraphicsEnvironment.isHeadless()
     * returns true.
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    @SuppressWarnings("deprecation")
    public int showDialog(Component parent, String approveButtonText)
        throws HeadlessException {
        if (dialog != null) {
            // Prevent to show second instance of dialog if the previous one still exists
            return JFileChooser.ERROR_OPTION;
        }

        if(approveButtonText != null) {
            setApproveButtonText(approveButtonText);
            setDialogType(CUSTOM_DIALOG);
        }
        dialog = createDialog(parent);
        dialog.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                returnValue = CANCEL_OPTION;
            }
        });
        returnValue = ERROR_OPTION;
        rescanCurrentDirectory();

        dialog.show();
        firePropertyChange("JFileChooserDialogIsClosingProperty", dialog, null);

        // Remove all components from dialog. The MetalFileChooserUI.installUI() method (and other LAFs)
        // registers AWT listener for dialogs and produces memory leaks. It happens when
        // installUI invoked after the showDialog method.
        dialog.getContentPane().removeAll();
        dialog.dispose();
        dialog = null;
        return returnValue;
    }

    
Creates and returns a new JDialog wrapping
this centered on the parent
in the parent's frame.
This method can be overriden to further manipulate the dialog,
to disable resizing, set the location, etc. Example:
    class MyFileChooser extends JFileChooser {
        protected JDialog createDialog(Component parent) throws HeadlessException {
            JDialog dialog = super.createDialog(parent);
            dialog.setLocation(300, 200);
            dialog.setResizable(false);
            return dialog;
        }
    }

Params:
parent –  the parent component of the dialog;
                 can be null
Throws:
HeadlessException – if GraphicsEnvironment.isHeadless()
returns true.
See Also:
GraphicsEnvironment.isHeadless
Returns:
a new JDialog containing this instance
Since:
1.4/**
     * Creates and returns a new <code>JDialog</code> wrapping
     * <code>this</code> centered on the <code>parent</code>
     * in the <code>parent</code>'s frame.
     * This method can be overriden to further manipulate the dialog,
     * to disable resizing, set the location, etc. Example:
     * <pre>
     *     class MyFileChooser extends JFileChooser {
     *         protected JDialog createDialog(Component parent) throws HeadlessException {
     *             JDialog dialog = super.createDialog(parent);
     *             dialog.setLocation(300, 200);
     *             dialog.setResizable(false);
     *             return dialog;
     *         }
     *     }
     * </pre>
     *
     * @param   parent  the parent component of the dialog;
     *                  can be <code>null</code>
     * @return a new <code>JDialog</code> containing this instance
     * @exception HeadlessException if GraphicsEnvironment.isHeadless()
     * returns true.
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @since 1.4
     */
    protected JDialog createDialog(Component parent) throws HeadlessException {
        FileChooserUI ui = getUI();
        String title = ui.getDialogTitle(this);
        putClientProperty(AccessibleContext.ACCESSIBLE_DESCRIPTION_PROPERTY,
                          title);

        JDialog dialog;
        Window window = JOptionPane.getWindowForComponent(parent);
        if (window instanceof Frame) {
            dialog = new JDialog((Frame)window, title, true);
        } else {
            dialog = new JDialog((Dialog)window, title, true);
        }
        dialog.setComponentOrientation(this.getComponentOrientation());

        Container contentPane = dialog.getContentPane();
        contentPane.setLayout(new BorderLayout());
        contentPane.add(this, BorderLayout.CENTER);

        if (JDialog.isDefaultLookAndFeelDecorated()) {
            boolean supportsWindowDecorations =
            UIManager.getLookAndFeel().getSupportsWindowDecorations();
            if (supportsWindowDecorations) {
                dialog.getRootPane().setWindowDecorationStyle(JRootPane.FILE_CHOOSER_DIALOG);
            }
        }
        dialog.pack();
        dialog.setLocationRelativeTo(parent);

        return dialog;
    }

    // **************************
    // ***** Dialog Options *****
    // **************************

    
Returns the value of the controlButtonsAreShown
property.
See Also:
setControlButtonsAreShown
Returns:
  the value of the controlButtonsAreShown
    property
Since:
1.3/**
     * Returns the value of the <code>controlButtonsAreShown</code>
     * property.
     *
     * @return   the value of the <code>controlButtonsAreShown</code>
     *     property
     *
     * @see #setControlButtonsAreShown
     * @since 1.3
     */
    public boolean getControlButtonsAreShown() {
        return controlsShown;
    }


    
Sets the property
that indicates whether the approve and cancel
buttons are shown in the file chooser.  This property
is true by default.  Look and feels
that always show these buttons will ignore the value
of this property.
This method fires a property-changed event,
using the string value of
CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY
as the name of the property.
Params:
b – false if control buttons should not be
   shown; otherwise, true
See Also:
getControlButtonsAreShown
CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY
Since:
1.3/**
     * Sets the property
     * that indicates whether the <i>approve</i> and <i>cancel</i>
     * buttons are shown in the file chooser.  This property
     * is <code>true</code> by default.  Look and feels
     * that always show these buttons will ignore the value
     * of this property.
     * This method fires a property-changed event,
     * using the string value of
     * <code>CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY</code>
     * as the name of the property.
     *
     * @param b <code>false</code> if control buttons should not be
     *    shown; otherwise, <code>true</code>
     *
     * @see #getControlButtonsAreShown
     * @see #CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY
     * @since 1.3
     */
    @BeanProperty(preferred = true, description
            = "Sets whether the approve & cancel buttons are shown.")
    public void setControlButtonsAreShown(boolean b) {
        if(controlsShown == b) {
            return;
        }
        boolean oldValue = controlsShown;
        controlsShown = b;
        firePropertyChange(CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY, oldValue, controlsShown);
    }

    
Returns the type of this dialog.  The default is
JFileChooser.OPEN_DIALOG.
See Also:
setDialogType
Returns:
  the type of dialog to be displayed:

JFileChooser.OPEN_DIALOG
JFileChooser.SAVE_DIALOG
JFileChooser.CUSTOM_DIALOG
/**
     * Returns the type of this dialog.  The default is
     * <code>JFileChooser.OPEN_DIALOG</code>.
     *
     * @return   the type of dialog to be displayed:
     * <ul>
     * <li>JFileChooser.OPEN_DIALOG
     * <li>JFileChooser.SAVE_DIALOG
     * <li>JFileChooser.CUSTOM_DIALOG
     * </ul>
     *
     * @see #setDialogType
     */
    public int getDialogType() {
        return dialogType;
    }

    
Sets the type of this dialog. Use OPEN_DIALOG when you
want to bring up a file chooser that the user can use to open a file.
Likewise, use SAVE_DIALOG for letting the user choose
a file for saving.
Use CUSTOM_DIALOG when you want to use the file
chooser in a context other than "Open" or "Save".
For instance, you might want to bring up a file chooser that allows
the user to choose a file to execute. Note that you normally would not
need to set the JFileChooser to use
CUSTOM_DIALOG
since a call to setApproveButtonText does this for you.
The default dialog type is JFileChooser.OPEN_DIALOG.
Params:
dialogType – the type of dialog to be displayed:

JFileChooser.OPEN_DIALOG
JFileChooser.SAVE_DIALOG
JFileChooser.CUSTOM_DIALOG
Throws:
IllegalArgumentException – if dialogType is
                         not legal
See Also:
getDialogType
setApproveButtonText/**
     * Sets the type of this dialog. Use <code>OPEN_DIALOG</code> when you
     * want to bring up a file chooser that the user can use to open a file.
     * Likewise, use <code>SAVE_DIALOG</code> for letting the user choose
     * a file for saving.
     * Use <code>CUSTOM_DIALOG</code> when you want to use the file
     * chooser in a context other than "Open" or "Save".
     * For instance, you might want to bring up a file chooser that allows
     * the user to choose a file to execute. Note that you normally would not
     * need to set the <code>JFileChooser</code> to use
     * <code>CUSTOM_DIALOG</code>
     * since a call to <code>setApproveButtonText</code> does this for you.
     * The default dialog type is <code>JFileChooser.OPEN_DIALOG</code>.
     *
     * @param dialogType the type of dialog to be displayed:
     * <ul>
     * <li>JFileChooser.OPEN_DIALOG
     * <li>JFileChooser.SAVE_DIALOG
     * <li>JFileChooser.CUSTOM_DIALOG
     * </ul>
     *
     * @exception IllegalArgumentException if <code>dialogType</code> is
     *                          not legal
     *
     * @see #getDialogType
     * @see #setApproveButtonText
     */
    // PENDING(jeff) - fire button text change property
    @BeanProperty(preferred = true, enumerationValues = {
            "JFileChooser.OPEN_DIALOG",
            "JFileChooser.SAVE_DIALOG",
            "JFileChooser.CUSTOM_DIALOG"}, description
            = "The type (open, save, custom) of the JFileChooser.")
    public void setDialogType(int dialogType) {
        if(this.dialogType == dialogType) {
            return;
        }
        checkDialogType(dialogType);
        int oldValue = this.dialogType;
        this.dialogType = dialogType;
        if(dialogType == OPEN_DIALOG || dialogType == SAVE_DIALOG) {
            setApproveButtonText(null);
        }
        firePropertyChange(DIALOG_TYPE_CHANGED_PROPERTY, oldValue, dialogType);
    }

    private static void checkDialogType(int dialogType) {
        if (!(dialogType == OPEN_DIALOG || dialogType == SAVE_DIALOG
                || dialogType == CUSTOM_DIALOG)) {
            throw new IllegalArgumentException(
                    "Incorrect Dialog Type: " + dialogType);
        }
    }

    
Sets the string that goes in the JFileChooser window's
title bar.
Params:
dialogTitle – the new String for the title bar
See Also:
getDialogTitle/**
     * Sets the string that goes in the <code>JFileChooser</code> window's
     * title bar.
     *
     * @param dialogTitle the new <code>String</code> for the title bar
     *
     * @see #getDialogTitle
     *
     */
    @BeanProperty(preferred = true, description
            = "The title of the JFileChooser dialog window.")
    public void setDialogTitle(String dialogTitle) {
        String oldValue = this.dialogTitle;
        this.dialogTitle = dialogTitle;
        if(dialog != null) {
            dialog.setTitle(dialogTitle);
        }
        firePropertyChange(DIALOG_TITLE_CHANGED_PROPERTY, oldValue, dialogTitle);
    }

    
Gets the string that goes in the JFileChooser's titlebar.
See Also:
setDialogTitle
Returns:
the string from the JFileChooser window's title bar/**
     * Gets the string that goes in the <code>JFileChooser</code>'s titlebar.
     *
     * @return the string from the {@code JFileChooser} window's title bar
     * @see #setDialogTitle
     */
    public String getDialogTitle() {
        return dialogTitle;
    }

    // ************************************
    // ***** JFileChooser View Options *****
    // ************************************



    
Sets the tooltip text used in the ApproveButton.
If null, the UI object will determine the button's text.
Params:
toolTipText – the tooltip text for the approve button
See Also:
setApproveButtonText
setDialogType
showDialog/**
     * Sets the tooltip text used in the <code>ApproveButton</code>.
     * If <code>null</code>, the UI object will determine the button's text.
     *
     * @param toolTipText the tooltip text for the approve button
     * @see #setApproveButtonText
     * @see #setDialogType
     * @see #showDialog
     */
    @BeanProperty(preferred = true, description
            = "The tooltip text for the ApproveButton.")
    public void setApproveButtonToolTipText(String toolTipText) {
        if(approveButtonToolTipText == toolTipText) {
            return;
        }
        String oldValue = approveButtonToolTipText;
        approveButtonToolTipText = toolTipText;
        firePropertyChange(APPROVE_BUTTON_TOOL_TIP_TEXT_CHANGED_PROPERTY, oldValue, approveButtonToolTipText);
    }


    
Returns the tooltip text used in the ApproveButton.
If null, the UI object will determine the button's text.
See Also:
setApproveButtonText
setDialogType
showDialog
Returns:
the tooltip text used for the approve button/**
     * Returns the tooltip text used in the <code>ApproveButton</code>.
     * If <code>null</code>, the UI object will determine the button's text.
     *
     * @return the tooltip text used for the approve button
     *
     * @see #setApproveButtonText
     * @see #setDialogType
     * @see #showDialog
     */
    public String getApproveButtonToolTipText() {
        return approveButtonToolTipText;
    }

    
Returns the approve button's mnemonic.
See Also:
setApproveButtonMnemonic
Returns:
an integer value for the mnemonic key/**
     * Returns the approve button's mnemonic.
     * @return an integer value for the mnemonic key
     *
     * @see #setApproveButtonMnemonic
     */
    public int getApproveButtonMnemonic() {
        return approveButtonMnemonic;
    }

    
Sets the approve button's mnemonic using a numeric keycode.
Params:
mnemonic –  an integer value for the mnemonic key
See Also:
getApproveButtonMnemonic/**
     * Sets the approve button's mnemonic using a numeric keycode.
     *
     * @param mnemonic  an integer value for the mnemonic key
     *
     * @see #getApproveButtonMnemonic
     */
    @BeanProperty(preferred = true, description
            = "The mnemonic key accelerator for the ApproveButton.")
    public void setApproveButtonMnemonic(int mnemonic) {
        if(approveButtonMnemonic == mnemonic) {
           return;
        }
        int oldValue = approveButtonMnemonic;
        approveButtonMnemonic = mnemonic;
        firePropertyChange(APPROVE_BUTTON_MNEMONIC_CHANGED_PROPERTY, oldValue, approveButtonMnemonic);
    }

    
Sets the approve button's mnemonic using a character.
Params:
mnemonic –  a character value for the mnemonic key
See Also:
getApproveButtonMnemonic/**
     * Sets the approve button's mnemonic using a character.
     * @param mnemonic  a character value for the mnemonic key
     *
     * @see #getApproveButtonMnemonic
     */
    public void setApproveButtonMnemonic(char mnemonic) {
        int vk = (int) mnemonic;
        if(vk >= 'a' && vk <='z') {
            vk -= ('a' - 'A');
        }
        setApproveButtonMnemonic(vk);
    }


    
Sets the text used in the ApproveButton in the
FileChooserUI.
Params:
approveButtonText – the text used in the ApproveButton
See Also:
getApproveButtonText
setDialogType
showDialog/**
     * Sets the text used in the <code>ApproveButton</code> in the
     * <code>FileChooserUI</code>.
     *
     * @param approveButtonText the text used in the <code>ApproveButton</code>
     *
     * @see #getApproveButtonText
     * @see #setDialogType
     * @see #showDialog
     */
    // PENDING(jeff) - have ui set this on dialog type change
    @BeanProperty(preferred = true, description
            = "The text that goes in the ApproveButton.")
    public void setApproveButtonText(String approveButtonText) {
        if(this.approveButtonText == approveButtonText) {
            return;
        }
        String oldValue = this.approveButtonText;
        this.approveButtonText = approveButtonText;
        firePropertyChange(APPROVE_BUTTON_TEXT_CHANGED_PROPERTY, oldValue, approveButtonText);
    }

    
Returns the text used in the ApproveButton in the
FileChooserUI.
If null, the UI object will determine the button's text.
Typically, this would be "Open" or "Save".
See Also:
setApproveButtonText
setDialogType
showDialog
Returns:
the text used in the ApproveButton/**
     * Returns the text used in the <code>ApproveButton</code> in the
     * <code>FileChooserUI</code>.
     * If <code>null</code>, the UI object will determine the button's text.
     *
     * Typically, this would be "Open" or "Save".
     *
     * @return the text used in the <code>ApproveButton</code>
     *
     * @see #setApproveButtonText
     * @see #setDialogType
     * @see #showDialog
     */
    public String getApproveButtonText() {
        return approveButtonText;
    }

    
Gets the list of user choosable file filters.
See Also:
addChoosableFileFilter
removeChoosableFileFilter
resetChoosableFileFilters
Returns:
a FileFilter array containing all the choosable
        file filters/**
     * Gets the list of user choosable file filters.
     *
     * @return a <code>FileFilter</code> array containing all the choosable
     *         file filters
     *
     * @see #addChoosableFileFilter
     * @see #removeChoosableFileFilter
     * @see #resetChoosableFileFilters
     */
    @BeanProperty(bound = false)
    public FileFilter[] getChoosableFileFilters() {
        FileFilter[] filterArray = new FileFilter[filters.size()];
        filters.copyInto(filterArray);
        return filterArray;
    }

    
Adds a filter to the list of user choosable file filters. For information on setting the file selection mode, see setFileSelectionMode. 
Params:
filter – the FileFilter to add to the choosable file
              filter list
See Also:
getChoosableFileFilters
removeChoosableFileFilter
resetChoosableFileFilters
setFileSelectionMode/**
     * Adds a filter to the list of user choosable file filters.
     * For information on setting the file selection mode, see
     * {@link #setFileSelectionMode setFileSelectionMode}.
     *
     * @param filter the <code>FileFilter</code> to add to the choosable file
     *               filter list
     *
     * @see #getChoosableFileFilters
     * @see #removeChoosableFileFilter
     * @see #resetChoosableFileFilters
     * @see #setFileSelectionMode
     */
    @BeanProperty(preferred = true, description
            = "Adds a filter to the list of user choosable file filters.")
    public void addChoosableFileFilter(FileFilter filter) {
        if(filter != null && !filters.contains(filter)) {
            FileFilter[] oldValue = getChoosableFileFilters();
            filters.addElement(filter);
            firePropertyChange(CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY, oldValue, getChoosableFileFilters());
            if (fileFilter == null && filters.size() == 1) {
                setFileFilter(filter);
            }
        }
    }

    
Removes a filter from the list of user choosable file filters. Returns
true if the file filter was removed.
Params:
f – the file filter to be removed
See Also:
addChoosableFileFilter
getChoosableFileFilters
resetChoosableFileFilters
Returns:
true if the file filter was removed, false otherwise/**
     * Removes a filter from the list of user choosable file filters. Returns
     * true if the file filter was removed.
     *
     * @param f the file filter to be removed
     * @return true if the file filter was removed, false otherwise
     * @see #addChoosableFileFilter
     * @see #getChoosableFileFilters
     * @see #resetChoosableFileFilters
     */
    public boolean removeChoosableFileFilter(FileFilter f) {
        int index = filters.indexOf(f);
        if (index >= 0) {
            if(getFileFilter() == f) {
                FileFilter aaff = getAcceptAllFileFilter();
                if (isAcceptAllFileFilterUsed() && (aaff != f)) {
                    // choose default filter if it is used
                    setFileFilter(aaff);
                }
                else if (index > 0) {
                    // choose the first filter, because it is not removed
                    setFileFilter(filters.get(0));
                }
                else if (filters.size() > 1) {
                    // choose the second filter, because the first one is removed
                    setFileFilter(filters.get(1));
                }
                else {
                    // no more filters
                    setFileFilter(null);
                }
            }
            FileFilter[] oldValue = getChoosableFileFilters();
            filters.removeElement(f);
            firePropertyChange(CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY, oldValue, getChoosableFileFilters());
            return true;
        } else {
            return false;
        }
    }

    
Resets the choosable file filter list to its starting state. Normally,
this removes all added file filters while leaving the
AcceptAll file filter.
See Also:
addChoosableFileFilter
getChoosableFileFilters
removeChoosableFileFilter/**
     * Resets the choosable file filter list to its starting state. Normally,
     * this removes all added file filters while leaving the
     * <code>AcceptAll</code> file filter.
     *
     * @see #addChoosableFileFilter
     * @see #getChoosableFileFilters
     * @see #removeChoosableFileFilter
     */
    public void resetChoosableFileFilters() {
        FileFilter[] oldValue = getChoosableFileFilters();
        setFileFilter(null);
        filters.removeAllElements();
        if(isAcceptAllFileFilterUsed()) {
           addChoosableFileFilter(getAcceptAllFileFilter());
        }
        firePropertyChange(CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY, oldValue, getChoosableFileFilters());
    }

    
Returns the AcceptAll file filter.
For example, on Microsoft Windows this would be All Files (*.*).
Returns:
the AcceptAll file filter/**
     * Returns the <code>AcceptAll</code> file filter.
     * For example, on Microsoft Windows this would be All Files (*.*).
     *
     * @return the {@code AcceptAll} file filter
     */
    @BeanProperty(bound = false)
    public FileFilter getAcceptAllFileFilter() {
        FileFilter filter = null;
        if(getUI() != null) {
            filter = getUI().getAcceptAllFileFilter(this);
        }
        return filter;
    }

   
Returns whether the AcceptAll FileFilter is used.
See Also:
setAcceptAllFileFilterUsed
Returns:
true if the AcceptAll FileFilter is used
Since:
1.3/**
    * Returns whether the <code>AcceptAll FileFilter</code> is used.
    * @return true if the <code>AcceptAll FileFilter</code> is used
    * @see #setAcceptAllFileFilterUsed
    * @since 1.3
    */
    public boolean isAcceptAllFileFilterUsed() {
        return useAcceptAllFileFilter;
    }

   
Determines whether the AcceptAll FileFilter is used
as an available choice in the choosable filter list.
If false, the AcceptAll file filter is removed from
the list of available file filters.
If true, the AcceptAll file filter will become the
actively used file filter.
Params:
b – a boolean which determines whether the AcceptAll file filter is an available choice in the choosable filter list
See Also:
isAcceptAllFileFilterUsed
getAcceptAllFileFilter
setFileFilter
Since:
1.3/**
    * Determines whether the <code>AcceptAll FileFilter</code> is used
    * as an available choice in the choosable filter list.
    * If false, the <code>AcceptAll</code> file filter is removed from
    * the list of available file filters.
    * If true, the <code>AcceptAll</code> file filter will become the
    * actively used file filter.
    *
    * @param b a {@code boolean} which determines whether the {@code AcceptAll}
    *          file filter is an available choice in the choosable filter list
    *
    * @see #isAcceptAllFileFilterUsed
    * @see #getAcceptAllFileFilter
    * @see #setFileFilter
    * @since 1.3
    */
    @BeanProperty(preferred = true, description
            = "Sets whether the AcceptAll FileFilter is used as an available choice in the choosable filter list.")
    public void setAcceptAllFileFilterUsed(boolean b) {
        boolean oldValue = useAcceptAllFileFilter;
        useAcceptAllFileFilter = b;
        if(!b) {
            removeChoosableFileFilter(getAcceptAllFileFilter());
        } else {
            removeChoosableFileFilter(getAcceptAllFileFilter());
            addChoosableFileFilter(getAcceptAllFileFilter());
        }
        firePropertyChange(ACCEPT_ALL_FILE_FILTER_USED_CHANGED_PROPERTY, oldValue, useAcceptAllFileFilter);
    }

    
Returns the accessory component.
See Also:
setAccessory
Returns:
this JFileChooser's accessory component, or null/**
     * Returns the accessory component.
     *
     * @return this JFileChooser's accessory component, or null
     * @see #setAccessory
     */
    public JComponent getAccessory() {
        return accessory;
    }

    
Sets the accessory component. An accessory is often used to show a
preview image of the selected file; however, it can be used for anything
that the programmer wishes, such as extra custom file chooser controls.

Note: if there was a previous accessory, you should unregister
any listeners that the accessory might have registered with the
file chooser.
Params:
newAccessory – the accessory component to be set/**
     * Sets the accessory component. An accessory is often used to show a
     * preview image of the selected file; however, it can be used for anything
     * that the programmer wishes, such as extra custom file chooser controls.
     *
     * <p>
     * Note: if there was a previous accessory, you should unregister
     * any listeners that the accessory might have registered with the
     * file chooser.
     *
     * @param newAccessory the accessory component to be set
     */
    @BeanProperty(preferred = true, description
            = "Sets the accessory component on the JFileChooser.")
    public void setAccessory(JComponent newAccessory) {
        JComponent oldValue = accessory;
        accessory = newAccessory;
        firePropertyChange(ACCESSORY_CHANGED_PROPERTY, oldValue, accessory);
    }

    
Sets the JFileChooser to allow the user to just
select files, just select
directories, or select both files and directories.  The default is
JFilesChooser.FILES_ONLY.
Params:
mode – the type of files to be displayed:

JFileChooser.FILES_ONLY
JFileChooser.DIRECTORIES_ONLY
JFileChooser.FILES_AND_DIRECTORIES
Throws:
IllegalArgumentException –  if mode is an
                         illegal file selection mode
See Also:
getFileSelectionMode/**
     * Sets the <code>JFileChooser</code> to allow the user to just
     * select files, just select
     * directories, or select both files and directories.  The default is
     * <code>JFilesChooser.FILES_ONLY</code>.
     *
     * @param mode the type of files to be displayed:
     * <ul>
     * <li>JFileChooser.FILES_ONLY
     * <li>JFileChooser.DIRECTORIES_ONLY
     * <li>JFileChooser.FILES_AND_DIRECTORIES
     * </ul>
     *
     * @exception IllegalArgumentException  if <code>mode</code> is an
     *                          illegal file selection mode
     *
     * @see #getFileSelectionMode
     */
    @BeanProperty(preferred = true, enumerationValues = {
            "JFileChooser.FILES_ONLY",
            "JFileChooser.DIRECTORIES_ONLY",
            "JFileChooser.FILES_AND_DIRECTORIES"}, description
            = "Sets the types of files that the JFileChooser can choose.")
    public void setFileSelectionMode(int mode) {
        if(fileSelectionMode == mode) {
            return;
        }

        checkFileSelectionMode(mode);
           int oldValue = fileSelectionMode;
           fileSelectionMode = mode;
           firePropertyChange(FILE_SELECTION_MODE_CHANGED_PROPERTY, oldValue, fileSelectionMode);
    }

    private static void checkFileSelectionMode(int mode) {
        if ((mode != FILES_ONLY) && (mode != DIRECTORIES_ONLY)
                && (mode != FILES_AND_DIRECTORIES)) {
            throw new IllegalArgumentException(
                    "Incorrect Mode for file selection: " + mode);
        }
    }

    
Returns the current file-selection mode.  The default is
JFilesChooser.FILES_ONLY.
See Also:
setFileSelectionMode
Returns:
the type of files to be displayed, one of the following:

JFileChooser.FILES_ONLY
JFileChooser.DIRECTORIES_ONLY
JFileChooser.FILES_AND_DIRECTORIES
/**
     * Returns the current file-selection mode.  The default is
     * <code>JFilesChooser.FILES_ONLY</code>.
     *
     * @return the type of files to be displayed, one of the following:
     * <ul>
     * <li>JFileChooser.FILES_ONLY
     * <li>JFileChooser.DIRECTORIES_ONLY
     * <li>JFileChooser.FILES_AND_DIRECTORIES
     * </ul>
     * @see #setFileSelectionMode
     */
    public int getFileSelectionMode() {
        return fileSelectionMode;
    }

    
Convenience call that determines if files are selectable based on the
current file selection mode.
See Also:
setFileSelectionMode
getFileSelectionMode
Returns:
true if files are selectable, false otherwise/**
     * Convenience call that determines if files are selectable based on the
     * current file selection mode.
     *
     * @return true if files are selectable, false otherwise
     * @see #setFileSelectionMode
     * @see #getFileSelectionMode
     */
    @BeanProperty(bound = false)
    public boolean isFileSelectionEnabled() {
        return ((fileSelectionMode == FILES_ONLY) || (fileSelectionMode == FILES_AND_DIRECTORIES));
    }

    
Convenience call that determines if directories are selectable based
on the current file selection mode.
See Also:
setFileSelectionMode
getFileSelectionMode
Returns:
true if directories are selectable, false otherwise/**
     * Convenience call that determines if directories are selectable based
     * on the current file selection mode.
     *
     * @return true if directories are selectable, false otherwise
     * @see #setFileSelectionMode
     * @see #getFileSelectionMode
     */
    @BeanProperty(bound = false)
    public boolean isDirectorySelectionEnabled() {
        return ((fileSelectionMode == DIRECTORIES_ONLY) || (fileSelectionMode == FILES_AND_DIRECTORIES));
    }

    
Sets the file chooser to allow multiple file selections.
Params:
b – true if multiple files may be selected
See Also:
isMultiSelectionEnabled/**
     * Sets the file chooser to allow multiple file selections.
     *
     * @param b true if multiple files may be selected
     *
     * @see #isMultiSelectionEnabled
     */
    @BeanProperty(description
            = "Sets multiple file selection mode.")
    public void setMultiSelectionEnabled(boolean b) {
        if(multiSelectionEnabled == b) {
            return;
        }
        boolean oldValue = multiSelectionEnabled;
        multiSelectionEnabled = b;
        firePropertyChange(MULTI_SELECTION_ENABLED_CHANGED_PROPERTY, oldValue, multiSelectionEnabled);
    }

    
Returns true if multiple files can be selected.
See Also:
setMultiSelectionEnabled
Returns:
true if multiple files can be selected/**
     * Returns true if multiple files can be selected.
     * @return true if multiple files can be selected
     * @see #setMultiSelectionEnabled
     */
    public boolean isMultiSelectionEnabled() {
        return multiSelectionEnabled;
    }


    
Returns true if hidden files are not shown in the file chooser;
otherwise, returns false.
See Also:
setFileHidingEnabled
Returns:
the status of the file hiding property/**
     * Returns true if hidden files are not shown in the file chooser;
     * otherwise, returns false.
     *
     * @return the status of the file hiding property
     * @see #setFileHidingEnabled
     */
    public boolean isFileHidingEnabled() {
        return useFileHiding;
    }

    
Sets file hiding on or off. If true, hidden files are not shown
in the file chooser. The job of determining which files are
shown is done by the FileView.
Params:
b – the boolean value that determines whether file hiding is
         turned on
See Also:
isFileHidingEnabled/**
     * Sets file hiding on or off. If true, hidden files are not shown
     * in the file chooser. The job of determining which files are
     * shown is done by the <code>FileView</code>.
     *
     * @param b the boolean value that determines whether file hiding is
     *          turned on
     * @see #isFileHidingEnabled
     */
    @BeanProperty(preferred = true, description
            = "Sets file hiding on or off.")
    public void setFileHidingEnabled(boolean b) {
        // Dump showFilesListener since we'll ignore it from now on
        if (showFilesListener != null) {
            Toolkit.getDefaultToolkit().removePropertyChangeListener(SHOW_HIDDEN_PROP, showFilesListener);
            showFilesListener = null;
        }
        boolean oldValue = useFileHiding;
        useFileHiding = b;
        firePropertyChange(FILE_HIDING_CHANGED_PROPERTY, oldValue, useFileHiding);
    }

    
Sets the current file filter. The file filter is used by the
file chooser to filter out files from the user's view.
Params:
filter – the new current file filter to use
See Also:
getFileFilter/**
     * Sets the current file filter. The file filter is used by the
     * file chooser to filter out files from the user's view.
     *
     * @param filter the new current file filter to use
     * @see #getFileFilter
     */
    @BeanProperty(preferred = true, description
            = "Sets the File Filter used to filter out files of type.")
    public void setFileFilter(FileFilter filter) {
        FileFilter oldValue = fileFilter;
        fileFilter = filter;
        if (filter != null) {
            if (isMultiSelectionEnabled() && selectedFiles != null && selectedFiles.length > 0) {
                Vector<File> fList = new Vector<File>();
                boolean failed = false;
                for (File file : selectedFiles) {
                    if (filter.accept(file)) {
                        fList.add(file);
                    } else {
                        failed = true;
                    }
                }
                if (failed) {
                    setSelectedFiles((fList.size() == 0) ? null : fList.toArray(new File[fList.size()]));
                }
            } else if (selectedFile != null && !filter.accept(selectedFile)) {
                setSelectedFile(null);
            }
        }
        firePropertyChange(FILE_FILTER_CHANGED_PROPERTY, oldValue, fileFilter);
    }


    
Returns the currently selected file filter.
See Also:
setFileFilter
addChoosableFileFilter
Returns:
the current file filter/**
     * Returns the currently selected file filter.
     *
     * @return the current file filter
     * @see #setFileFilter
     * @see #addChoosableFileFilter
     */
    public FileFilter getFileFilter() {
        return fileFilter;
    }

    
Sets the file view to be used to retrieve UI information, such as
the icon that represents a file or the type description of a file.
Params:
fileView – a FileView to be used to retrieve UI information
See Also:
getFileView/**
     * Sets the file view to be used to retrieve UI information, such as
     * the icon that represents a file or the type description of a file.
     *
     * @param fileView a {@code FileView} to be used to retrieve UI information
     *
     * @see #getFileView
     */
    @BeanProperty(preferred = true, description
            = "Sets the File View used to get file type information.")
    public void setFileView(FileView fileView) {
        FileView oldValue = this.fileView;
        this.fileView = fileView;
        firePropertyChange(FILE_VIEW_CHANGED_PROPERTY, oldValue, fileView);
    }

    
Returns the current file view.
See Also:
setFileView
Returns:
the current file view/**
     * Returns the current file view.
     *
     * @return the current file view
     * @see #setFileView
     */
    public FileView getFileView() {
        return fileView;
    }

    // ******************************
    // *****FileView delegation *****
    // ******************************

    // NOTE: all of the following methods attempt to delegate
    // first to the client set fileView, and if <code>null</code> is returned
    // (or there is now client defined fileView) then calls the
    // UI's default fileView.

    
Returns the filename.
Params:
f – the File
See Also:
FileView.getName
Returns:
the String containing the filename for
         f/**
     * Returns the filename.
     * @param f the <code>File</code>
     * @return the <code>String</code> containing the filename for
     *          <code>f</code>
     * @see FileView#getName
     */
    public String getName(File f) {
        String filename = null;
        if(f != null) {
            if(getFileView() != null) {
                filename = getFileView().getName(f);
            }

            FileView uiFileView = getUI().getFileView(this);

            if(filename == null && uiFileView != null) {
                filename = uiFileView.getName(f);
            }
        }
        return filename;
    }

    
Returns the file description.
Params:
f – the File
See Also:
FileView.getDescription
Returns:
the String containing the file description for
         f/**
     * Returns the file description.
     * @param f the <code>File</code>
     * @return the <code>String</code> containing the file description for
     *          <code>f</code>
     * @see FileView#getDescription
     */
    public String getDescription(File f) {
        String description = null;
        if(f != null) {
            if(getFileView() != null) {
                description = getFileView().getDescription(f);
            }

            FileView uiFileView = getUI().getFileView(this);

            if(description == null && uiFileView != null) {
                description = uiFileView.getDescription(f);
            }
        }
        return description;
    }

    
Returns the file type.
Params:
f – the File
See Also:
FileView.getTypeDescription
Returns:
the String containing the file type description for
         f/**
     * Returns the file type.
     * @param f the <code>File</code>
     * @return the <code>String</code> containing the file type description for
     *          <code>f</code>
     * @see FileView#getTypeDescription
     */
    public String getTypeDescription(File f) {
        String typeDescription = null;
        if(f != null) {
            if(getFileView() != null) {
                typeDescription = getFileView().getTypeDescription(f);
            }

            FileView uiFileView = getUI().getFileView(this);

            if(typeDescription == null && uiFileView != null) {
                typeDescription = uiFileView.getTypeDescription(f);
            }
        }
        return typeDescription;
    }

    
Returns the icon for this file or type of file, depending
on the system.
Params:
f – the File
See Also:
FileView.getIcon
Returns:
the Icon for this file, or type of file/**
     * Returns the icon for this file or type of file, depending
     * on the system.
     * @param f the <code>File</code>
     * @return the <code>Icon</code> for this file, or type of file
     * @see FileView#getIcon
     */
    public Icon getIcon(File f) {
        Icon icon = null;
        if (f != null) {
            if(getFileView() != null) {
                icon = getFileView().getIcon(f);
            }

            FileView uiFileView = getUI().getFileView(this);

            if(icon == null && uiFileView != null) {
                icon = uiFileView.getIcon(f);
            }
        }
        return icon;
    }

    
Returns true if the file (directory) can be visited.
Returns false if the directory cannot be traversed.
Params:
f – the File
See Also:
FileView.isTraversable
Returns:
true if the file/directory can be traversed, otherwise false/**
     * Returns true if the file (directory) can be visited.
     * Returns false if the directory cannot be traversed.
     * @param f the <code>File</code>
     * @return true if the file/directory can be traversed, otherwise false
     * @see FileView#isTraversable
     */
    public boolean isTraversable(File f) {
        Boolean traversable = null;
        if (f != null) {
            if (getFileView() != null) {
                traversable = getFileView().isTraversable(f);
            }

            FileView uiFileView = getUI().getFileView(this);

            if (traversable == null && uiFileView != null) {
                traversable = uiFileView.isTraversable(f);
            }
            if (traversable == null) {
                traversable = getFileSystemView().isTraversable(f);
            }
        }
        return (traversable != null && traversable.booleanValue());
    }

    
Returns true if the file should be displayed.
Params:
f – the File
See Also:
FileFilter.accept
Returns:
true if the file should be displayed, otherwise false/**
     * Returns true if the file should be displayed.
     * @param f the <code>File</code>
     * @return true if the file should be displayed, otherwise false
     * @see FileFilter#accept
     */
    public boolean accept(File f) {
        boolean shown = true;
        if(f != null && fileFilter != null) {
            shown = fileFilter.accept(f);
        }
        return shown;
    }

    
Sets the file system view that the JFileChooser uses for
accessing and creating file system resources, such as finding
the floppy drive and getting a list of root drives.
Params:
fsv –  the new FileSystemView
See Also:
FileSystemView/**
     * Sets the file system view that the <code>JFileChooser</code> uses for
     * accessing and creating file system resources, such as finding
     * the floppy drive and getting a list of root drives.
     * @param fsv  the new <code>FileSystemView</code>
     *
     * @see FileSystemView
     */
    @BeanProperty(expert = true, description
            = "Sets the FileSytemView used to get filesystem information.")
    public void setFileSystemView(FileSystemView fsv) {
        FileSystemView oldValue = fileSystemView;
        fileSystemView = fsv;
        firePropertyChange(FILE_SYSTEM_VIEW_CHANGED_PROPERTY, oldValue, fileSystemView);
    }

    
Returns the file system view.
See Also:
setFileSystemView
Returns:
the FileSystemView object/**
     * Returns the file system view.
     * @return the <code>FileSystemView</code> object
     * @see #setFileSystemView
     */
    public FileSystemView getFileSystemView() {
        return fileSystemView;
    }

    // **************************
    // ***** Event Handling *****
    // **************************

    
Called by the UI when the user hits the Approve button
(labeled "Open" or "Save", by default). This can also be
called by the programmer.
This method causes an action event to fire
with the command string equal to
APPROVE_SELECTION.
See Also:
APPROVE_SELECTION/**
     * Called by the UI when the user hits the Approve button
     * (labeled "Open" or "Save", by default). This can also be
     * called by the programmer.
     * This method causes an action event to fire
     * with the command string equal to
     * <code>APPROVE_SELECTION</code>.
     *
     * @see #APPROVE_SELECTION
     */
    public void approveSelection() {
        returnValue = APPROVE_OPTION;
        if(dialog != null) {
            dialog.setVisible(false);
        }
        fireActionPerformed(APPROVE_SELECTION);
    }

    
Called by the UI when the user chooses the Cancel button.
This can also be called by the programmer.
This method causes an action event to fire
with the command string equal to
CANCEL_SELECTION.
See Also:
CANCEL_SELECTION/**
     * Called by the UI when the user chooses the Cancel button.
     * This can also be called by the programmer.
     * This method causes an action event to fire
     * with the command string equal to
     * <code>CANCEL_SELECTION</code>.
     *
     * @see #CANCEL_SELECTION
     */
    public void cancelSelection() {
        returnValue = CANCEL_OPTION;
        if(dialog != null) {
            dialog.setVisible(false);
        }
        fireActionPerformed(CANCEL_SELECTION);
    }

    
Adds an ActionListener to the file chooser.
Params:
l –  the listener to be added
See Also:
approveSelection
cancelSelection/**
     * Adds an <code>ActionListener</code> to the file chooser.
     *
     * @param l  the listener to be added
     *
     * @see #approveSelection
     * @see #cancelSelection
     */
    public void addActionListener(ActionListener l) {
        listenerList.add(ActionListener.class, l);
    }

    
Removes an ActionListener from the file chooser.
Params:
l –  the listener to be removed
See Also:
addActionListener/**
     * Removes an <code>ActionListener</code> from the file chooser.
     *
     * @param l  the listener to be removed
     *
     * @see #addActionListener
     */
    public void removeActionListener(ActionListener l) {
        listenerList.remove(ActionListener.class, l);
    }

    
Returns an array of all the action listeners
registered on this file chooser.
See Also:
addActionListener
removeActionListener
Returns:
all of this file chooser's ActionListeners
        or an empty
        array if no action listeners are currently registered
Since:
1.4/**
     * Returns an array of all the action listeners
     * registered on this file chooser.
     *
     * @return all of this file chooser's <code>ActionListener</code>s
     *         or an empty
     *         array if no action listeners are currently registered
     *
     * @see #addActionListener
     * @see #removeActionListener
     *
     * @since 1.4
     */
    @BeanProperty(bound = false)
    public ActionListener[] getActionListeners() {
        return listenerList.getListeners(ActionListener.class);
    }

    
Notifies all listeners that have registered interest for
notification on this event type. The event instance
is lazily created using the command parameter.
Params:
command – a string that may specify a command associated with
               the event
See Also:
EventListenerList/**
     * Notifies all listeners that have registered interest for
     * notification on this event type. The event instance
     * is lazily created using the <code>command</code> parameter.
     *
     * @param command a string that may specify a command associated with
     *                the event
     * @see EventListenerList
     */
    @SuppressWarnings("deprecation")
    protected void fireActionPerformed(String command) {
        // Guaranteed to return a non-null array
        Object[] listeners = listenerList.getListenerList();
        long mostRecentEventTime = EventQueue.getMostRecentEventTime();
        int modifiers = 0;
        AWTEvent currentEvent = EventQueue.getCurrentEvent();
        if (currentEvent instanceof InputEvent) {
            modifiers = ((InputEvent)currentEvent).getModifiers();
        } else if (currentEvent instanceof ActionEvent) {
            modifiers = ((ActionEvent)currentEvent).getModifiers();
        }
        ActionEvent e = null;
        // Process the listeners last to first, notifying
        // those that are interested in this event
        for (int i = listeners.length-2; i>=0; i-=2) {
            if (listeners[i]==ActionListener.class) {
                // Lazily create the event:
                if (e == null) {
                    e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED,
                                        command, mostRecentEventTime,
                                        modifiers);
                }
                ((ActionListener)listeners[i+1]).actionPerformed(e);
            }
        }
    }

    private static class WeakPCL implements PropertyChangeListener {
        WeakReference<JFileChooser> jfcRef;

        public WeakPCL(JFileChooser jfc) {
            jfcRef = new WeakReference<JFileChooser>(jfc);
        }
        public void propertyChange(PropertyChangeEvent ev) {
            assert ev.getPropertyName().equals(SHOW_HIDDEN_PROP);
            JFileChooser jfc = jfcRef.get();
            if (jfc == null) {
                // Our JFileChooser is no longer around, so we no longer need to
                // listen for PropertyChangeEvents.
                Toolkit.getDefaultToolkit().removePropertyChangeListener(SHOW_HIDDEN_PROP, this);
            }
            else {
                boolean oldValue = jfc.useFileHiding;
                jfc.useFileHiding = !((Boolean)ev.getNewValue()).booleanValue();
                jfc.firePropertyChange(FILE_HIDING_CHANGED_PROPERTY, oldValue, jfc.useFileHiding);
            }
        }
    }

    // *********************************
    // ***** Pluggable L&F methods *****
    // *********************************

    
Resets the UI property to a value from the current look and feel.
See Also:
updateUI.updateUI/**
     * Resets the UI property to a value from the current look and feel.
     *
     * @see JComponent#updateUI
     */
    public void updateUI() {
        if (isAcceptAllFileFilterUsed()) {
            removeChoosableFileFilter(getAcceptAllFileFilter());
        }
        FileChooserUI ui = ((FileChooserUI)UIManager.getUI(this));
        if (fileSystemView == null) {
            // We were probably deserialized
            setFileSystemView(FileSystemView.getFileSystemView());
        }
        setUI(ui);

        if(isAcceptAllFileFilterUsed()) {
            addChoosableFileFilter(getAcceptAllFileFilter());
        }
    }

    
Returns a string that specifies the name of the L&F class
that renders this component.
See Also:
JComponent.getUIClassID
UIDefaults.getUI
Returns:
the string "FileChooserUI"/**
     * Returns a string that specifies the name of the L&amp;F class
     * that renders this component.
     *
     * @return the string "FileChooserUI"
     * @see JComponent#getUIClassID
     * @see UIDefaults#getUI
     */
    @BeanProperty(bound = false, expert = true, description
            = "A string that specifies the name of the L&F class.")
    public String getUIClassID() {
        return uiClassID;
    }

    
Gets the UI object which implements the L&F for this component.
Returns:
the FileChooserUI object that implements the FileChooserUI L&F/**
     * Gets the UI object which implements the L&amp;F for this component.
     *
     * @return the FileChooserUI object that implements the FileChooserUI L&amp;F
     */
    @BeanProperty(bound = false)
    public FileChooserUI getUI() {
        return (FileChooserUI) ui;
    }

    
See readObject and writeObject in
JComponent for more
information about serialization in Swing.
/**
     * See <code>readObject</code> and <code>writeObject</code> in
     * <code>JComponent</code> for more
     * information about serialization in Swing.
     */
    private void readObject(java.io.ObjectInputStream in)
            throws IOException, ClassNotFoundException {
        ObjectInputStream.GetField f = in.readFields();

        dialogTitle = (String) f.get("dialogTitle", null);
        approveButtonText = (String) f.get("approveButtonText", null);
        approveButtonToolTipText =
                (String) f.get("approveButtonToolTipText", null);
        approveButtonMnemonic = f.get("approveButtonMnemonic", 0);
        @SuppressWarnings("unchecked")
        Vector<FileFilter> newFilters = (Vector<FileFilter>) f.get("filters", null);
        if (newFilters == null) {
            throw new InvalidObjectException("Null filters");
        }
        filters = newFilters;
        dialog = (JDialog) f.get("dialog", null);
        int newDialogType = f.get("dialogType", OPEN_DIALOG);
        checkDialogType(newDialogType);
        dialogType = newDialogType;
        returnValue = f.get("returnValue", 0);
        accessory = (JComponent) f.get("accessory", null);
        fileView = (FileView) f.get("fileView", null);
        controlsShown = f.get("controlsShown", false);
        useFileHiding = f.get("useFileHiding", false);
        int newFileSelectionMode = f.get("fileSelectionMode", FILES_ONLY);
        checkFileSelectionMode(newFileSelectionMode);
        fileSelectionMode = newFileSelectionMode;
        multiSelectionEnabled = f.get("multiSelectionEnabled", false);
        useAcceptAllFileFilter = f.get("useAcceptAllFileFilter", false);
        boolean newDragEnabled = f.get("dragEnabled", false);
        checkDragEnabled(newDragEnabled);
        dragEnabled = newDragEnabled;
        fileFilter = (FileFilter) f.get("fileFilter", null);
        fileSystemView = (FileSystemView) f.get("fileSystemView", null);
        currentDirectory = (File) f.get("currentDirectory", null);
        selectedFile = (File) f.get("selectedFile", null);
        selectedFiles = (File[]) f.get("selectedFiles", null);
        accessibleContext = (AccessibleContext) f.get("accessibleContext", null);

        installShowFilesListener();
    }

    
See readObject and writeObject in
JComponent for more
information about serialization in Swing.
/**
     * See <code>readObject</code> and <code>writeObject</code> in
     * <code>JComponent</code> for more
     * information about serialization in Swing.
     */
    private void writeObject(ObjectOutputStream s) throws IOException {
        FileSystemView fsv = null;

        if (isAcceptAllFileFilterUsed()) {
            //The AcceptAllFileFilter is UI specific, it will be reset by
            //updateUI() after deserialization
            removeChoosableFileFilter(getAcceptAllFileFilter());
        }
        if (fileSystemView.equals(FileSystemView.getFileSystemView())) {
            //The default FileSystemView is platform specific, it will be
            //reset by updateUI() after deserialization
            fsv = fileSystemView;
            fileSystemView = null;
        }
        s.defaultWriteObject();
        if (fsv != null) {
            fileSystemView = fsv;
        }
        if (isAcceptAllFileFilterUsed()) {
            addChoosableFileFilter(getAcceptAllFileFilter());
        }
        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 JFileChooser.
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 JFileChooser/**
     * Returns a string representation of this <code>JFileChooser</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>JFileChooser</code>
     */
    protected String paramString() {
        String approveButtonTextString = (approveButtonText != null ?
                                          approveButtonText: "");
        String dialogTitleString = (dialogTitle != null ?
                                    dialogTitle: "");
        String dialogTypeString;
        if (dialogType == OPEN_DIALOG) {
            dialogTypeString = "OPEN_DIALOG";
        } else if (dialogType == SAVE_DIALOG) {
            dialogTypeString = "SAVE_DIALOG";
        } else if (dialogType == CUSTOM_DIALOG) {
            dialogTypeString = "CUSTOM_DIALOG";
        } else dialogTypeString = "";
        String returnValueString;
        if (returnValue == CANCEL_OPTION) {
            returnValueString = "CANCEL_OPTION";
        } else if (returnValue == APPROVE_OPTION) {
            returnValueString = "APPROVE_OPTION";
        } else if (returnValue == ERROR_OPTION) {
            returnValueString = "ERROR_OPTION";
        } else returnValueString = "";
        String useFileHidingString = (useFileHiding ?
                                    "true" : "false");
        String fileSelectionModeString;
        if (fileSelectionMode == FILES_ONLY) {
            fileSelectionModeString = "FILES_ONLY";
        } else if (fileSelectionMode == DIRECTORIES_ONLY) {
            fileSelectionModeString = "DIRECTORIES_ONLY";
        } else if (fileSelectionMode == FILES_AND_DIRECTORIES) {
            fileSelectionModeString = "FILES_AND_DIRECTORIES";
        } else fileSelectionModeString = "";
        String currentDirectoryString = (currentDirectory != null ?
                                         currentDirectory.toString() : "");
        String selectedFileString = (selectedFile != null ?
                                     selectedFile.toString() : "");

        return super.paramString() +
        ",approveButtonText=" + approveButtonTextString +
        ",currentDirectory=" + currentDirectoryString +
        ",dialogTitle=" + dialogTitleString +
        ",dialogType=" + dialogTypeString +
        ",fileSelectionMode=" + fileSelectionModeString +
        ",returnValue=" + returnValueString +
        ",selectedFile=" + selectedFileString +
        ",useFileHiding=" + useFileHidingString;
    }

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

    
AccessibleContext associated with this JFileChooser /**
     * {@code AccessibleContext} associated with this {@code JFileChooser}
     */
    protected AccessibleContext accessibleContext = null;

    
Gets the AccessibleContext associated with this JFileChooser.
For file choosers, the AccessibleContext takes the form of an
AccessibleJFileChooser.
A new AccessibleJFileChooser instance is created if necessary.
Returns:
an AccessibleJFileChooser that serves as the
        AccessibleContext of this JFileChooser/**
     * Gets the AccessibleContext associated with this JFileChooser.
     * For file choosers, the AccessibleContext takes the form of an
     * AccessibleJFileChooser.
     * A new AccessibleJFileChooser instance is created if necessary.
     *
     * @return an AccessibleJFileChooser that serves as the
     *         AccessibleContext of this JFileChooser
     */
    @BeanProperty(bound = false)
    public AccessibleContext getAccessibleContext() {
        if (accessibleContext == null) {
            accessibleContext = new AccessibleJFileChooser();
        }
        return accessibleContext;
    }

    
This class implements accessibility support for the
JFileChooser class.  It provides an implementation of the
Java Accessibility API appropriate to file chooser user-interface
elements.
/**
     * This class implements accessibility support for the
     * <code>JFileChooser</code> class.  It provides an implementation of the
     * Java Accessibility API appropriate to file chooser user-interface
     * elements.
     */
    @SuppressWarnings("serial") // Superclass is not serializable across versions
    protected class AccessibleJFileChooser extends AccessibleJComponent {

        
Gets the role of this object.
See Also:
AccessibleRole
Returns:
an instance of AccessibleRole describing the role of the
object/**
         * Gets the role of this object.
         *
         * @return an instance of AccessibleRole describing the role of the
         * object
         * @see AccessibleRole
         */
        public AccessibleRole getAccessibleRole() {
            return AccessibleRole.FILE_CHOOSER;
        }

    } // inner class AccessibleJFileChooser

    private class FCHierarchyListener implements HierarchyListener,
            Serializable {
        @Override
        public void hierarchyChanged(HierarchyEvent e) {
            if ((e.getChangeFlags() & HierarchyEvent.PARENT_CHANGED)
                    == HierarchyEvent.PARENT_CHANGED) {
                JFileChooser fc = JFileChooser.this;
                JRootPane rootPane = SwingUtilities.getRootPane(fc);
                if (rootPane != null) {
                    rootPane.setDefaultButton(fc.getUI().getDefaultButton(fc));
                }
            }
        }
    }
}