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/*
 * Copyright (c) 1997, 2006, 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
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 * questions.
 */

package javax.swing;

import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.util.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.accessibility.*;
import sun.swing.SwingUtilities2;

import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;


A component that lets the user switch between a group of components by
clicking on a tab with a given title and/or icon.
For examples and information on using tabbed panes see
How to Use Tabbed Panes,
a section in The Java Tutorial.


Tabs/components are added to a TabbedPane object by using the
addTab and insertTab methods.
A tab is represented by an index corresponding
to the position it was added in, where the first tab has an index equal to 0
and the last tab has an index equal to the tab count minus 1.


The TabbedPane uses a SingleSelectionModel
to represent the set
of tab indices and the currently selected index.  If the tab count
is greater than 0, then there will always be a selected index, which
by default will be initialized to the first tab.  If the tab count is
0, then the selected index will be -1.


The tab title can be rendered by a Component.
For example, the following produce similar results:

// In this case the look and feel renders the title for the tab.
tabbedPane.addTab("Tab", myComponent);
// In this case the custom component is responsible for rendering the
// title of the tab.
tabbedPane.addTab(null, myComponent);
tabbedPane.setTabComponentAt(0, new JLabel("Tab"));


The latter is typically used when you want a more complex user interaction
that requires custom components on the tab.  For example, you could
provide a custom component that animates or one that has widgets for
closing the tab.


If you specify a component for a tab, the JTabbedPane
will not render any text or icon you have specified for the tab.


Note:
Do not use setVisible directly on a tab component to make it visible,
use setSelectedComponent or setSelectedIndex methods instead.


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


Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeansTM
has been added to the java.beans package. Please see XMLEncoder. 
Author:Dave Moore, Philip Milne, Amy Fowler
See Also:
@beaninfo
     attribute: isContainer true
   description: A component which provides a tab folder metaphor for
                displaying one component from a set of components.
/**
 * A component that lets the user switch between a group of components by
 * clicking on a tab with a given title and/or icon.
 * For examples and information on using tabbed panes see
 * <a href="http://java.sun.com/docs/books/tutorial/uiswing/components/tabbedpane.html">How to Use Tabbed Panes</a>,
 * a section in <em>The Java Tutorial</em>.
 * <p>
 * Tabs/components are added to a <code>TabbedPane</code> object by using the
 * <code>addTab</code> and <code>insertTab</code> methods.
 * A tab is represented by an index corresponding
 * to the position it was added in, where the first tab has an index equal to 0
 * and the last tab has an index equal to the tab count minus 1.
 * <p>
 * The <code>TabbedPane</code> uses a <code>SingleSelectionModel</code>
 * to represent the set
 * of tab indices and the currently selected index.  If the tab count
 * is greater than 0, then there will always be a selected index, which
 * by default will be initialized to the first tab.  If the tab count is
 * 0, then the selected index will be -1.
 * <p>
 * The tab title can be rendered by a <code>Component</code>.
 * For example, the following produce similar results:
 * <pre>
 * // In this case the look and feel renders the title for the tab.
 * tabbedPane.addTab("Tab", myComponent);
 * // In this case the custom component is responsible for rendering the
 * // title of the tab.
 * tabbedPane.addTab(null, myComponent);
 * tabbedPane.setTabComponentAt(0, new JLabel("Tab"));
 * </pre>
 * The latter is typically used when you want a more complex user interaction
 * that requires custom components on the tab.  For example, you could
 * provide a custom component that animates or one that has widgets for
 * closing the tab.
 * <p>
 * If you specify a component for a tab, the <code>JTabbedPane</code>
 * will not render any text or icon you have specified for the tab.
 * <p>
 * <strong>Note:</strong>
 * Do not use <code>setVisible</code> directly on a tab component to make it visible,
 * use <code>setSelectedComponent</code> or <code>setSelectedIndex</code> methods instead.
 * <p>
 * <strong>Warning:</strong> Swing is not thread safe. For more
 * information see <a
 * href="package-summary.html#threading">Swing's Threading
 * Policy</a>.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans<sup><font size="-2">TM</font></sup>
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @beaninfo
 *      attribute: isContainer true
 *    description: A component which provides a tab folder metaphor for
 *                 displaying one component from a set of components.
 *
 * @author Dave Moore
 * @author Philip Milne
 * @author Amy Fowler
 *
 * @see SingleSelectionModel
 */
public class JTabbedPane extends JComponent
       implements Serializable, Accessible, SwingConstants {

   
The tab layout policy for wrapping tabs in multiple runs when all
tabs will not fit within a single run.

/**
    * The tab layout policy for wrapping tabs in multiple runs when all
    * tabs will not fit within a single run.
    */
    public static final int WRAP_TAB_LAYOUT = 0;

   
Tab layout policy for providing a subset of available tabs when all
the tabs will not fit within a single run.  If all the tabs do
not fit within a single run the look and feel will provide a way
to navigate to hidden tabs.

/**
    * Tab layout policy for providing a subset of available tabs when all
    * the tabs will not fit within a single run.  If all the tabs do
    * not fit within a single run the look and feel will provide a way
    * to navigate to hidden tabs.
    */
    public static final int SCROLL_TAB_LAYOUT = 1;


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

    
Where the tabs are placed.

See Also:
  • setTabPlacement
/**
     * Where the tabs are placed.
     * @see #setTabPlacement
     */
    protected int tabPlacement = TOP;

    private int tabLayoutPolicy;

    
The default selection model 
/** The default selection model */
    protected SingleSelectionModel model;

    private boolean haveRegistered;

    
The changeListener is the listener we add to the
model.

/**
     * The <code>changeListener</code> is the listener we add to the
     * model.
     */
    protected ChangeListener changeListener = null;

    private final java.util.List<Page> pages;

    /* The component that is currently visible */
    private Component visComp = null;

    
Only one ChangeEvent is needed per TabPane
instance since the
event's only (read-only) state is the source property.  The source
of events generated here is always "this".

/**
     * Only one <code>ChangeEvent</code> is needed per <code>TabPane</code>
     * instance since the
     * event's only (read-only) state is the source property.  The source
     * of events generated here is always "this".
     */
    protected transient ChangeEvent changeEvent = null;

    
Creates an empty TabbedPane with a default
tab placement of JTabbedPane.TOP.

See Also:
  • addTab
/**
     * Creates an empty <code>TabbedPane</code> with a default
     * tab placement of <code>JTabbedPane.TOP</code>.
     * @see #addTab
     */
    public JTabbedPane() {
        this(TOP, WRAP_TAB_LAYOUT);
    }

    
Creates an empty TabbedPane with the specified tab placement
of either: JTabbedPane.TOP, JTabbedPane.BOTTOM,
JTabbedPane.LEFT, or JTabbedPane.RIGHT.

Params:
  • tabPlacement – the placement for the tabs relative to the content
See Also:
/**
     * Creates an empty <code>TabbedPane</code> with the specified tab placement
     * of either: <code>JTabbedPane.TOP</code>, <code>JTabbedPane.BOTTOM</code>,
     * <code>JTabbedPane.LEFT</code>, or <code>JTabbedPane.RIGHT</code>.
     *
     * @param tabPlacement the placement for the tabs relative to the content
     * @see #addTab
     */
    public JTabbedPane(int tabPlacement) {
        this(tabPlacement, WRAP_TAB_LAYOUT);
    }

    
Creates an empty TabbedPane with the specified tab placement
and tab layout policy.  Tab placement may be either:
JTabbedPane.TOP, JTabbedPane.BOTTOM,
JTabbedPane.LEFT, or JTabbedPane.RIGHT.
Tab layout policy may be either: JTabbedPane.WRAP_TAB_LAYOUT
or JTabbedPane.SCROLL_TAB_LAYOUT.

Params:
  • tabPlacement – the placement for the tabs relative to the content
  • tabLayoutPolicy – the policy for laying out tabs when all tabs will not fit on one run
Throws:
See Also:
Since:1.4
/**
     * Creates an empty <code>TabbedPane</code> with the specified tab placement
     * and tab layout policy.  Tab placement may be either:
     * <code>JTabbedPane.TOP</code>, <code>JTabbedPane.BOTTOM</code>,
     * <code>JTabbedPane.LEFT</code>, or <code>JTabbedPane.RIGHT</code>.
     * Tab layout policy may be either: <code>JTabbedPane.WRAP_TAB_LAYOUT</code>
     * or <code>JTabbedPane.SCROLL_TAB_LAYOUT</code>.
     *
     * @param tabPlacement the placement for the tabs relative to the content
     * @param tabLayoutPolicy the policy for laying out tabs when all tabs will not fit on one run
     * @exception IllegalArgumentException if tab placement or tab layout policy are not
     *            one of the above supported values
     * @see #addTab
     * @since 1.4
     */
    public JTabbedPane(int tabPlacement, int tabLayoutPolicy) {
        setTabPlacement(tabPlacement);
        setTabLayoutPolicy(tabLayoutPolicy);
        pages = new ArrayList<Page>(1);
        setModel(new DefaultSingleSelectionModel());
        updateUI();
    }

    
Returns the UI object which implements the L&F for this component.

See Also:
Returns:a TabbedPaneUI object
/**
     * Returns the UI object which implements the L&F for this component.
     *
     * @return a <code>TabbedPaneUI</code> object
     * @see #setUI
     */
    public TabbedPaneUI getUI() {
        return (TabbedPaneUI)ui;
    }

    
Sets the UI object which implements the L&F for this component.

Params:
  • ui – the new UI object
See Also:
@beaninfo
       bound: true
      hidden: true
   attribute: visualUpdate true
 description: The UI object that implements the tabbedpane's LookAndFeel
/**
     * Sets the UI object which implements the L&F for this component.
     *
     * @param ui the new UI object
     * @see UIDefaults#getUI
     * @beaninfo
     *        bound: true
     *       hidden: true
     *    attribute: visualUpdate true
     *  description: The UI object that implements the tabbedpane's LookAndFeel
     */
    public void setUI(TabbedPaneUI ui) {
        super.setUI(ui);
        // disabled icons are generated by LF so they should be unset here
        for (int i = 0; i < getTabCount(); i++) {
            Icon icon = pages.get(i).disabledIcon;
            if (icon instanceof UIResource) {
                setDisabledIconAt(i, null);
            }
        }
    }

    
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() {
        setUI((TabbedPaneUI)UIManager.getUI(this));
    }


    
Returns the name of the UI class that implements the
L&F for this component.

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


    
We pass ModelChanged events along to the listeners with
the tabbedpane (instead of the model itself) as the event source.

/**
     * We pass <code>ModelChanged</code> events along to the listeners with
     * the tabbedpane (instead of the model itself) as the event source.
     */
    protected class ModelListener implements ChangeListener, Serializable {
        public void stateChanged(ChangeEvent e) {
            fireStateChanged();
        }
    }

    
Subclasses that want to handle ChangeEvents differently
can override this to return a subclass of ModelListener or
another ChangeListener implementation.

See Also:
  • fireStateChanged
/**
     * Subclasses that want to handle <code>ChangeEvents</code> differently
     * can override this to return a subclass of <code>ModelListener</code> or
     * another <code>ChangeListener</code> implementation.
     *
     * @see #fireStateChanged
     */
    protected ChangeListener createChangeListener() {
        return new ModelListener();
    }

    
Adds a ChangeListener to this tabbedpane.

Params:
  • l – the ChangeListener to add
See Also:
/**
     * Adds a <code>ChangeListener</code> to this tabbedpane.
     *
     * @param l the <code>ChangeListener</code> to add
     * @see #fireStateChanged
     * @see #removeChangeListener
     */
    public void addChangeListener(ChangeListener l) {
        listenerList.add(ChangeListener.class, l);
    }

    
Removes a ChangeListener from this tabbedpane.

Params:
  • l – the ChangeListener to remove
See Also:
/**
     * Removes a <code>ChangeListener</code> from this tabbedpane.
     *
     * @param l the <code>ChangeListener</code> to remove
     * @see #fireStateChanged
     * @see #addChangeListener
     */
    public void removeChangeListener(ChangeListener l) {
        listenerList.remove(ChangeListener.class, l);
    }

   
Returns an array of all the ChangeListeners added
to this JTabbedPane with addChangeListener.

Returns:all of the ChangeListeners added or an empty
        array if no listeners have been added
Since:1.4
/**
     * Returns an array of all the <code>ChangeListener</code>s added
     * to this <code>JTabbedPane</code> with <code>addChangeListener</code>.
     *
     * @return all of the <code>ChangeListener</code>s added or an empty
     *         array if no listeners have been added
     * @since 1.4
     */
    public ChangeListener[] getChangeListeners() {
        return listenerList.getListeners(ChangeListener.class);
    }

    
Sends a ChangeEvent, with this JTabbedPane as the source, to each registered listener. This method is called each time there is a change to either the selected index or the selected tab in the JTabbedPane. Usually, the selected index and selected tab change together. However, there are some cases, such as tab addition, where the selected index changes and the same tab remains selected. There are other cases, such as deleting the selected tab, where the index remains the same, but a new tab moves to that index. Events are fired for all of these cases. 
See Also:
/**
     * Sends a {@code ChangeEvent}, with this {@code JTabbedPane} as the source,
     * to each registered listener. This method is called each time there is
     * a change to either the selected index or the selected tab in the
     * {@code JTabbedPane}. Usually, the selected index and selected tab change
     * together. However, there are some cases, such as tab addition, where the
     * selected index changes and the same tab remains selected. There are other
     * cases, such as deleting the selected tab, where the index remains the
     * same, but a new tab moves to that index. Events are fired for all of
     * these cases.
     *
     * @see #addChangeListener
     * @see EventListenerList
     */
    protected void fireStateChanged() {
        /* --- Begin code to deal with visibility --- */

        /* This code deals with changing the visibility of components to
         * hide and show the contents for the selected tab. It duplicates
         * logic already present in BasicTabbedPaneUI, logic that is
         * processed during the layout pass. This code exists to allow
         * developers to do things that are quite difficult to accomplish
         * with the previous model of waiting for the layout pass to process
         * visibility changes; such as requesting focus on the new visible
         * component.
         *
         * For the average code, using the typical JTabbedPane methods,
         * all visibility changes will now be processed here. However,
         * the code in BasicTabbedPaneUI still exists, for the purposes
         * of backward compatibility. Therefore, when making changes to
         * this code, ensure that the BasicTabbedPaneUI code is kept in
         * synch.
         */

        int selIndex = getSelectedIndex();

        /* if the selection is now nothing */
        if (selIndex < 0) {
            /* if there was a previous visible component */
            if (visComp != null && visComp.isVisible()) {
                /* make it invisible */
                visComp.setVisible(false);
            }

            /* now there's no visible component */
            visComp = null;

        /* else - the selection is now something */
        } else {
            /* Fetch the component for the new selection */
            Component newComp = getComponentAt(selIndex);

            /* if the new component is non-null and different */
            if (newComp != null && newComp != visComp) {
                boolean shouldChangeFocus = false;

                /* Note: the following (clearing of the old visible component)
                 * is inside this if-statement for good reason: Tabbed pane
                 * should continue to show the previously visible component
                 * if there is no component for the chosen tab.
                 */

                /* if there was a previous visible component */
                if (visComp != null) {
                    shouldChangeFocus =
                        (SwingUtilities.findFocusOwner(visComp) != null);

                    /* if it's still visible */
                    if (visComp.isVisible()) {
                        /* make it invisible */
                        visComp.setVisible(false);
                    }
                }

                if (!newComp.isVisible()) {
                    newComp.setVisible(true);
                }

                if (shouldChangeFocus) {
                    SwingUtilities2.tabbedPaneChangeFocusTo(newComp);
                }

                visComp = newComp;
            } /* else - the visible component shouldn't changed */
        }

        /* --- End code to deal with visibility --- */

        // Guaranteed to return a non-null array
        Object[] listeners = listenerList.getListenerList();
        // 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]==ChangeListener.class) {
                // Lazily create the event:
                if (changeEvent == null)
                    changeEvent = new ChangeEvent(this);
                ((ChangeListener)listeners[i+1]).stateChanged(changeEvent);
            }
        }
    }

    
Returns the model associated with this tabbedpane.

See Also:
  • setModel
/**
     * Returns the model associated with this tabbedpane.
     *
     * @see #setModel
     */
    public SingleSelectionModel getModel() {
        return model;
    }

    
Sets the model to be used with this tabbedpane.

Params:
  • model – the model to be used
See Also:
@beaninfo
      bound: true
description: The tabbedpane's SingleSelectionModel.
/**
     * Sets the model to be used with this tabbedpane.
     *
     * @param model the model to be used
     * @see #getModel
     * @beaninfo
     *       bound: true
     * description: The tabbedpane's SingleSelectionModel.
     */
    public void setModel(SingleSelectionModel model) {
        SingleSelectionModel oldModel = getModel();

        if (oldModel != null) {
            oldModel.removeChangeListener(changeListener);
            changeListener = null;
        }

        this.model = model;

        if (model != null) {
            changeListener = createChangeListener();
            model.addChangeListener(changeListener);
        }

        firePropertyChange("model", oldModel, model);
        repaint();
    }

    
Returns the placement of the tabs for this tabbedpane.

See Also:
  • setTabPlacement
/**
     * Returns the placement of the tabs for this tabbedpane.
     * @see #setTabPlacement
     */
    public int getTabPlacement() {
        return tabPlacement;
    }

    
Sets the tab placement for this tabbedpane.
Possible values are:
    

  • JTabbedPane.TOP

  • JTabbedPane.BOTTOM

  • JTabbedPane.LEFT

  • JTabbedPane.RIGHT


The default value, if not set, is SwingConstants.TOP.

Params:
  • tabPlacement – the placement for the tabs relative to the content
Throws:
@beaninfo
   preferred: true
       bound: true
   attribute: visualUpdate true
        enum: TOP JTabbedPane.TOP
              LEFT JTabbedPane.LEFT
              BOTTOM JTabbedPane.BOTTOM
              RIGHT JTabbedPane.RIGHT
 description: The tabbedpane's tab placement.
/**
     * Sets the tab placement for this tabbedpane.
     * Possible values are:<ul>
     * <li><code>JTabbedPane.TOP</code>
     * <li><code>JTabbedPane.BOTTOM</code>
     * <li><code>JTabbedPane.LEFT</code>
     * <li><code>JTabbedPane.RIGHT</code>
     * </ul>
     * The default value, if not set, is <code>SwingConstants.TOP</code>.
     *
     * @param tabPlacement the placement for the tabs relative to the content
     * @exception IllegalArgumentException if tab placement value isn't one
     *                          of the above valid values
     *
     * @beaninfo
     *    preferred: true
     *        bound: true
     *    attribute: visualUpdate true
     *         enum: TOP JTabbedPane.TOP
     *               LEFT JTabbedPane.LEFT
     *               BOTTOM JTabbedPane.BOTTOM
     *               RIGHT JTabbedPane.RIGHT
     *  description: The tabbedpane's tab placement.
     *
     */
    public void setTabPlacement(int tabPlacement) {
        if (tabPlacement != TOP && tabPlacement != LEFT &&
            tabPlacement != BOTTOM && tabPlacement != RIGHT) {
            throw new IllegalArgumentException("illegal tab placement: must be TOP, BOTTOM, LEFT, or RIGHT");
        }
        if (this.tabPlacement != tabPlacement) {
            int oldValue = this.tabPlacement;
            this.tabPlacement = tabPlacement;
            firePropertyChange("tabPlacement", oldValue, tabPlacement);
            revalidate();
            repaint();
        }
    }

    
Returns the policy used by the tabbedpane to layout the tabs when all the
tabs will not fit within a single run.

See Also:
  • setTabLayoutPolicy
Since:1.4
/**
     * Returns the policy used by the tabbedpane to layout the tabs when all the
     * tabs will not fit within a single run.
     * @see #setTabLayoutPolicy
     * @since 1.4
     */
    public int getTabLayoutPolicy() {
        return tabLayoutPolicy;
    }

   
Sets the policy which the tabbedpane will use in laying out the tabs
when all the tabs will not fit within a single run.
Possible values are:

    

  • JTabbedPane.WRAP_TAB_LAYOUT

  • JTabbedPane.SCROLL_TAB_LAYOUT


The default value, if not set by the UI, is JTabbedPane.WRAP_TAB_LAYOUT.


Some look and feels might only support a subset of the possible
layout policies, in which case the value of this property may be
ignored.

Params:
  • tabLayoutPolicy – the policy used to layout the tabs
Throws:
See Also:
Since:1.4
@beaninfo
   preferred: true
       bound: true
   attribute: visualUpdate true
        enum: WRAP_TAB_LAYOUT JTabbedPane.WRAP_TAB_LAYOUT
              SCROLL_TAB_LAYOUT JTabbedPane.SCROLL_TAB_LAYOUT
 description: The tabbedpane's policy for laying out the tabs
/**
     * Sets the policy which the tabbedpane will use in laying out the tabs
     * when all the tabs will not fit within a single run.
     * Possible values are:
     * <ul>
     * <li><code>JTabbedPane.WRAP_TAB_LAYOUT</code>
     * <li><code>JTabbedPane.SCROLL_TAB_LAYOUT</code>
     * </ul>
     *
     * The default value, if not set by the UI, is <code>JTabbedPane.WRAP_TAB_LAYOUT</code>.
     * <p>
     * Some look and feels might only support a subset of the possible
     * layout policies, in which case the value of this property may be
     * ignored.
     *
     * @param tabLayoutPolicy the policy used to layout the tabs
     * @exception IllegalArgumentException if layoutPolicy value isn't one
     *                          of the above valid values
     * @see #getTabLayoutPolicy
     * @since 1.4
     *
     * @beaninfo
     *    preferred: true
     *        bound: true
     *    attribute: visualUpdate true
     *         enum: WRAP_TAB_LAYOUT JTabbedPane.WRAP_TAB_LAYOUT
     *               SCROLL_TAB_LAYOUT JTabbedPane.SCROLL_TAB_LAYOUT
     *  description: The tabbedpane's policy for laying out the tabs
     *
     */
    public void setTabLayoutPolicy(int tabLayoutPolicy) {
        if (tabLayoutPolicy != WRAP_TAB_LAYOUT && tabLayoutPolicy != SCROLL_TAB_LAYOUT) {
            throw new IllegalArgumentException("illegal tab layout policy: must be WRAP_TAB_LAYOUT or SCROLL_TAB_LAYOUT");
        }
        if (this.tabLayoutPolicy != tabLayoutPolicy) {
            int oldValue = this.tabLayoutPolicy;
            this.tabLayoutPolicy = tabLayoutPolicy;
            firePropertyChange("tabLayoutPolicy", oldValue, tabLayoutPolicy);
            revalidate();
            repaint();
        }
    }

    
Returns the currently selected index for this tabbedpane.
Returns -1 if there is no currently selected tab.

See Also:
Returns:the index of the selected tab
/**
     * Returns the currently selected index for this tabbedpane.
     * Returns -1 if there is no currently selected tab.
     *
     * @return the index of the selected tab
     * @see #setSelectedIndex
     */
    public int getSelectedIndex() {
        return model.getSelectedIndex();
    }

    
Sets the selected index for this tabbedpane. The index must be
a valid tab index or -1, which indicates that no tab should be selected
(can also be used when there are no tabs in the tabbedpane).  If a -1
value is specified when the tabbedpane contains one or more tabs, then
the results will be implementation defined.

Params:
  • index –  the index to be selected
Throws:
See Also:
@beaninfo
  preferred: true
description: The tabbedpane's selected tab index.
/**
     * Sets the selected index for this tabbedpane. The index must be
     * a valid tab index or -1, which indicates that no tab should be selected
     * (can also be used when there are no tabs in the tabbedpane).  If a -1
     * value is specified when the tabbedpane contains one or more tabs, then
     * the results will be implementation defined.
     *
     * @param index  the index to be selected
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < -1 || index >= tab count)
     *
     * @see #getSelectedIndex
     * @see SingleSelectionModel#setSelectedIndex
     * @beaninfo
     *   preferred: true
     * description: The tabbedpane's selected tab index.
     */
    public void setSelectedIndex(int index) {
        if (index != -1) {
            checkIndex(index);
        }
        setSelectedIndexImpl(index, true);
    }


    private void setSelectedIndexImpl(int index, boolean doAccessibleChanges) {
        int oldIndex = model.getSelectedIndex();
        Page oldPage = null, newPage = null;
        String oldName = null;

        doAccessibleChanges = doAccessibleChanges && (oldIndex != index);

        if (doAccessibleChanges) {
            if (accessibleContext != null) {
                oldName = accessibleContext.getAccessibleName();
            }

            if (oldIndex >= 0) {
                oldPage = pages.get(oldIndex);
            }

            if (index >= 0) {
                newPage = pages.get(index);
            }
        }

        model.setSelectedIndex(index);

        if (doAccessibleChanges) {
            changeAccessibleSelection(oldPage, oldName, newPage);
        }
    }

    private void changeAccessibleSelection(Page oldPage, String oldName, Page newPage) {
        if (accessibleContext == null) {
            return;
        }

        if (oldPage != null) {
            oldPage.firePropertyChange(AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                       AccessibleState.SELECTED, null);
        }

        if (newPage != null) {
            newPage.firePropertyChange(AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                       null, AccessibleState.SELECTED);
        }

        accessibleContext.firePropertyChange(
            AccessibleContext.ACCESSIBLE_NAME_PROPERTY,
            oldName,
            accessibleContext.getAccessibleName());
    }

    
Returns the currently selected component for this tabbedpane.
Returns null if there is no currently selected tab.

See Also:
Returns:the component corresponding to the selected tab
/**
     * Returns the currently selected component for this tabbedpane.
     * Returns <code>null</code> if there is no currently selected tab.
     *
     * @return the component corresponding to the selected tab
     * @see #setSelectedComponent
     */
    public Component getSelectedComponent() {
        int index = getSelectedIndex();
        if (index == -1) {
            return null;
        }
        return getComponentAt(index);
    }

    
Sets the selected component for this tabbedpane.  This
will automatically set the selectedIndex to the index
corresponding to the specified component.

Throws:
  • IllegalArgumentException – if component not found in tabbed
         pane
See Also:
@beaninfo
  preferred: true
description: The tabbedpane's selected component.
/**
     * Sets the selected component for this tabbedpane.  This
     * will automatically set the <code>selectedIndex</code> to the index
     * corresponding to the specified component.
     *
     * @exception IllegalArgumentException if component not found in tabbed
     *          pane
     * @see #getSelectedComponent
     * @beaninfo
     *   preferred: true
     * description: The tabbedpane's selected component.
     */
    public void setSelectedComponent(Component c) {
        int index = indexOfComponent(c);
        if (index != -1) {
            setSelectedIndex(index);
        } else {
            throw new IllegalArgumentException("component not found in tabbed pane");
        }
    }

    
Inserts a new tab for the given component, at the given index, represented by the given title and/or icon, either of which may be null. 
Params:
  • title – the title to be displayed on the tab
  • icon – the icon to be displayed on the tab
  • component – the component to be displayed when this tab is clicked.
  • tip – the tooltip to be displayed for this tab
  • index – the position to insert this new tab (> 0 and <= getTabCount())
Throws:
See Also:
/**
     * Inserts a new tab for the given component, at the given index,
     * represented by the given title and/or icon, either of which may
     * be {@code null}.
     *
     * @param title the title to be displayed on the tab
     * @param icon the icon to be displayed on the tab
     * @param component the component to be displayed when this tab is clicked.
     * @param tip the tooltip to be displayed for this tab
     * @param index the position to insert this new tab
     *       ({@code > 0 and <= getTabCount()})
     *
     * @throws IndexOutOfBoundsException if the index is out of range
     *         ({@code < 0 or > getTabCount()})
     *
     * @see #addTab
     * @see #removeTabAt
     */
    public void insertTab(String title, Icon icon, Component component, String tip, int index) {
        int newIndex = index;

        // If component already exists, remove corresponding
        // tab so that new tab gets added correctly
        // Note: we are allowing component=null because of compatibility,
        // but we really should throw an exception because much of the
        // rest of the JTabbedPane implementation isn't designed to deal
        // with null components for tabs.
        int removeIndex = indexOfComponent(component);
        if (component != null && removeIndex != -1) {
            removeTabAt(removeIndex);
            if (newIndex > removeIndex) {
                newIndex--;
            }
        }

        int selectedIndex = getSelectedIndex();

        pages.add(
            newIndex,
            new Page(this, title != null? title : "", icon, null, component, tip));


        if (component != null) {
            addImpl(component, null, -1);
            component.setVisible(false);
        } else {
            firePropertyChange("indexForNullComponent", -1, index);
        }

        if (pages.size() == 1) {
            setSelectedIndex(0);
        }

        if (selectedIndex >= newIndex) {
            setSelectedIndexImpl(selectedIndex + 1, false);
        }

        if (!haveRegistered && tip != null) {
            ToolTipManager.sharedInstance().registerComponent(this);
            haveRegistered = true;
        }

        if (accessibleContext != null) {
            accessibleContext.firePropertyChange(
                    AccessibleContext.ACCESSIBLE_VISIBLE_DATA_PROPERTY,
                    null, component);
        }
        revalidate();
        repaint();
    }

    
Adds a component and tip
represented by a title and/or icon,
either of which can be null.
Cover method for insertTab.

Params:
  • title – the title to be displayed in this tab
  • icon – the icon to be displayed in this tab
  • component – the component to be displayed when this tab is clicked
  • tip – the tooltip to be displayed for this tab
See Also:
/**
     * Adds a <code>component</code> and <code>tip</code>
     * represented by a <code>title</code> and/or <code>icon</code>,
     * either of which can be <code>null</code>.
     * Cover method for <code>insertTab</code>.
     *
     * @param title the title to be displayed in this tab
     * @param icon the icon to be displayed in this tab
     * @param component the component to be displayed when this tab is clicked
     * @param tip the tooltip to be displayed for this tab
     *
     * @see #insertTab
     * @see #removeTabAt
     */
    public void addTab(String title, Icon icon, Component component, String tip) {
        insertTab(title, icon, component, tip, pages.size());
    }

    
Adds a component represented by a title
and/or icon, either of which can be null.
Cover method for insertTab.

Params:
  • title – the title to be displayed in this tab
  • icon – the icon to be displayed in this tab
  • component – the component to be displayed when this tab is clicked
See Also:
/**
     * Adds a <code>component</code> represented by a <code>title</code>
     * and/or <code>icon</code>, either of which can be <code>null</code>.
     * Cover method for <code>insertTab</code>.
     *
     * @param title the title to be displayed in this tab
     * @param icon the icon to be displayed in this tab
     * @param component the component to be displayed when this tab is clicked
     *
     * @see #insertTab
     * @see #removeTabAt
     */
    public void addTab(String title, Icon icon, Component component) {
        insertTab(title, icon, component, null, pages.size());
    }

    
Adds a component represented by a title
and no icon.
Cover method for insertTab.

Params:
  • title – the title to be displayed in this tab
  • component – the component to be displayed when this tab is clicked
See Also:
/**
     * Adds a <code>component</code> represented by a <code>title</code>
     * and no icon.
     * Cover method for <code>insertTab</code>.
     *
     * @param title the title to be displayed in this tab
     * @param component the component to be displayed when this tab is clicked
     *
     * @see #insertTab
     * @see #removeTabAt
     */
    public void addTab(String title, Component component) {
        insertTab(title, null, component, null, pages.size());
    }

    
Adds a component with a tab title defaulting to
the name of the component which is the result of calling
component.getName.
Cover method for insertTab.

Params:
  • component – the component to be displayed when this tab is clicked
See Also:
Returns:the component
/**
     * Adds a <code>component</code> with a tab title defaulting to
     * the name of the component which is the result of calling
     * <code>component.getName</code>.
     * Cover method for <code>insertTab</code>.
     *
     * @param component the component to be displayed when this tab is clicked
     * @return the component
     *
     * @see #insertTab
     * @see #removeTabAt
     */
    public Component add(Component component) {
        if (!(component instanceof UIResource)) {
            addTab(component.getName(), component);
        } else {
            super.add(component);
        }
        return component;
    }

    
Adds a component with the specified tab title.
Cover method for insertTab.

Params:
  • title – the title to be displayed in this tab
  • component – the component to be displayed when this tab is clicked
See Also:
Returns:the component
/**
     * Adds a <code>component</code> with the specified tab title.
     * Cover method for <code>insertTab</code>.
     *
     * @param title the title to be displayed in this tab
     * @param component the component to be displayed when this tab is clicked
     * @return the component
     *
     * @see #insertTab
     * @see #removeTabAt
     */
    public Component add(String title, Component component) {
        if (!(component instanceof UIResource)) {
            addTab(title, component);
        } else {
            super.add(title, component);
        }
        return component;
    }

    
Adds a component at the specified tab index with a tab
title defaulting to the name of the component.
Cover method for insertTab.

Params:
  • component – the component to be displayed when this tab is clicked
  • index – the position to insert this new tab
See Also:
Returns:the component
/**
     * Adds a <code>component</code> at the specified tab index with a tab
     * title defaulting to the name of the component.
     * Cover method for <code>insertTab</code>.
     *
     * @param component the component to be displayed when this tab is clicked
     * @param index the position to insert this new tab
     * @return the component
     *
     * @see #insertTab
     * @see #removeTabAt
     */
    public Component add(Component component, int index) {
        if (!(component instanceof UIResource)) {
            // Container.add() interprets -1 as "append", so convert
            // the index appropriately to be handled by the vector
            insertTab(component.getName(), null, component, null,
                      index == -1? getTabCount() : index);
        } else {
            super.add(component, index);
        }
        return component;
    }

    
Adds a component to the tabbed pane.
If constraints is a String or an
Icon, it will be used for the tab title,
otherwise the component's name will be used as the tab title.
Cover method for insertTab.

Params:
  • component – the component to be displayed when this tab is clicked
  • constraints – the object to be displayed in the tab
See Also:
/**
     * Adds a <code>component</code> to the tabbed pane.
     * If <code>constraints</code> is a <code>String</code> or an
     * <code>Icon</code>, it will be used for the tab title,
     * otherwise the component's name will be used as the tab title.
     * Cover method for <code>insertTab</code>.
     *
     * @param component the component to be displayed when this tab is clicked
     * @param constraints the object to be displayed in the tab
     *
     * @see #insertTab
     * @see #removeTabAt
     */
    public void add(Component component, Object constraints) {
        if (!(component instanceof UIResource)) {
            if (constraints instanceof String) {
                addTab((String)constraints, component);
            } else if (constraints instanceof Icon) {
                addTab(null, (Icon)constraints, component);
            } else {
                add(component);
            }
        } else {
            super.add(component, constraints);
        }
    }

    
Adds a component at the specified tab index.
If constraints is a String or an
Icon, it will be used for the tab title,
otherwise the component's name will be used as the tab title.
Cover method for insertTab.

Params:
  • component – the component to be displayed when this tab is clicked
  • constraints – the object to be displayed in the tab
  • index – the position to insert this new tab
See Also:
/**
     * Adds a <code>component</code> at the specified tab index.
     * If <code>constraints</code> is a <code>String</code> or an
     * <code>Icon</code>, it will be used for the tab title,
     * otherwise the component's name will be used as the tab title.
     * Cover method for <code>insertTab</code>.
     *
     * @param component the component to be displayed when this tab is clicked
     * @param constraints the object to be displayed in the tab
     * @param index the position to insert this new tab
     *
     * @see #insertTab
     * @see #removeTabAt
     */
    public void add(Component component, Object constraints, int index) {
        if (!(component instanceof UIResource)) {

            Icon icon = constraints instanceof Icon? (Icon)constraints : null;
            String title = constraints instanceof String? (String)constraints : null;
            // Container.add() interprets -1 as "append", so convert
            // the index appropriately to be handled by the vector
            insertTab(title, icon, component, null, index == -1? getTabCount() : index);
        } else {
            super.add(component, constraints, index);
        }
    }

    
Removes the tab at index.
After the component associated with index is removed,
its visibility is reset to true to ensure it will be visible
if added to other containers.

Params:
  • index – the index of the tab to be removed
Throws:
See Also:
/**
     * Removes the tab at <code>index</code>.
     * After the component associated with <code>index</code> is removed,
     * its visibility is reset to true to ensure it will be visible
     * if added to other containers.
     * @param index the index of the tab to be removed
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #addTab
     * @see #insertTab
     */
    public void removeTabAt(int index) {
        checkIndex(index);

        Component component = getComponentAt(index);
        boolean shouldChangeFocus = false;
        int selected = getSelectedIndex();
        String oldName = null;

        /* if we're about to remove the visible component */
        if (component == visComp) {
            shouldChangeFocus = (SwingUtilities.findFocusOwner(visComp) != null);
            visComp = null;
        }

        if (accessibleContext != null) {
            /* if we're removing the selected page */
            if (index == selected) {
                /* fire an accessible notification that it's unselected */
                pages.get(index).firePropertyChange(
                    AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                    AccessibleState.SELECTED, null);

                oldName = accessibleContext.getAccessibleName();
            }

            accessibleContext.firePropertyChange(
                    AccessibleContext.ACCESSIBLE_VISIBLE_DATA_PROPERTY,
                    component, null);
        }

        // Force the tabComponent to be cleaned up.
        setTabComponentAt(index, null);
        pages.remove(index);

        // NOTE 4/15/2002 (joutwate):
        // This fix is implemented using client properties since there is
        // currently no IndexPropertyChangeEvent.  Once
        // IndexPropertyChangeEvents have been added this code should be
        // modified to use it.
        putClientProperty("__index_to_remove__", new Integer(index));

        /* if the selected tab is after the removal */
        if (selected > index) {
            setSelectedIndexImpl(selected - 1, false);

        /* if the selected tab is the last tab */
        } else if (selected >= getTabCount()) {
            setSelectedIndexImpl(selected - 1, false);
            Page newSelected = (selected != 0)
                ? pages.get(selected - 1)
                : null;

            changeAccessibleSelection(null, oldName, newSelected);

        /* selected index hasn't changed, but the associated tab has */
        } else if (index == selected) {
            fireStateChanged();
            changeAccessibleSelection(null, oldName, pages.get(index));
        }

        // We can't assume the tab indices correspond to the
        // container's children array indices, so make sure we
        // remove the correct child!
        if (component != null) {
            Component components[] = getComponents();
            for (int i = components.length; --i >= 0; ) {
                if (components[i] == component) {
                    super.remove(i);
                    component.setVisible(true);
                    break;
                }
            }
        }

        if (shouldChangeFocus) {
            SwingUtilities2.tabbedPaneChangeFocusTo(getSelectedComponent());
        }

        revalidate();
        repaint();
    }

    
Removes the specified Component from the
JTabbedPane. The method does nothing
if the component is null.

Params:
  • component – the component to remove from the tabbedpane
See Also:
/**
     * Removes the specified <code>Component</code> from the
     * <code>JTabbedPane</code>. The method does nothing
     * if the <code>component</code> is null.
     *
     * @param component the component to remove from the tabbedpane
     * @see #addTab
     * @see #removeTabAt
     */
    public void remove(Component component) {
        int index = indexOfComponent(component);
        if (index != -1) {
            removeTabAt(index);
        } else {
            // Container#remove(comp) invokes Container#remove(int)
            // so make sure JTabbedPane#remove(int) isn't called here
            Component children[] = getComponents();
            for (int i=0; i < children.length; i++) {
                if (component == children[i]) {
                    super.remove(i);
                    break;
                }
            }
        }
    }

    
Removes the tab and component which corresponds to the specified index.

Params:
  • index – the index of the component to remove from the
         tabbedpane
Throws:
See Also:
/**
     * Removes the tab and component which corresponds to the specified index.
     *
     * @param index the index of the component to remove from the
     *          <code>tabbedpane</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     * @see #addTab
     * @see #removeTabAt
     */
    public void remove(int index) {
        removeTabAt(index);
    }

    
Removes all the tabs and their corresponding components
from the tabbedpane.

See Also:
/**
     * Removes all the tabs and their corresponding components
     * from the <code>tabbedpane</code>.
     *
     * @see #addTab
     * @see #removeTabAt
     */
    public void removeAll() {
        setSelectedIndexImpl(-1, true);

        int tabCount = getTabCount();
        // We invoke removeTabAt for each tab, otherwise we may end up
        // removing Components added by the UI.
        while (tabCount-- > 0) {
            removeTabAt(tabCount);
        }
    }

    
Returns the number of tabs in this tabbedpane.

Returns:an integer specifying the number of tabbed pages
/**
     * Returns the number of tabs in this <code>tabbedpane</code>.
     *
     * @return an integer specifying the number of tabbed pages
     */
    public int getTabCount() {
        return pages.size();
    }

    
Returns the number of tab runs currently used to display
the tabs.

Returns:an integer giving the number of rows if the
         tabPlacement
         is TOP or BOTTOM
         and the number of columns if
         tabPlacement
         is LEFT or RIGHT,
         or 0 if there is no UI set on this tabbedpane
/**
     * Returns the number of tab runs currently used to display
     * the tabs.
     * @return an integer giving the number of rows if the
     *          <code>tabPlacement</code>
     *          is <code>TOP</code> or <code>BOTTOM</code>
     *          and the number of columns if
     *          <code>tabPlacement</code>
     *          is <code>LEFT</code> or <code>RIGHT</code>,
     *          or 0 if there is no UI set on this <code>tabbedpane</code>
     */
    public int getTabRunCount() {
        if (ui != null) {
            return ((TabbedPaneUI)ui).getTabRunCount(this);
        }
        return 0;
    }


// Getters for the Pages

    
Returns the tab title at index.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:the title at index
/**
     * Returns the tab title at <code>index</code>.
     *
     * @param index  the index of the item being queried
     * @return the title at <code>index</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     * @see #setTitleAt
     */
    public String getTitleAt(int index) {
        return pages.get(index).title;
    }

    
Returns the tab icon at index.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:the icon at index
/**
     * Returns the tab icon at <code>index</code>.
     *
     * @param index  the index of the item being queried
     * @return the icon at <code>index</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setIconAt
     */
    public Icon getIconAt(int index) {
        return pages.get(index).icon;
    }

    
Returns the tab disabled icon at index.
If the tab disabled icon doesn't exist at index
this will forward the call to the look and feel to construct
an appropriate disabled Icon from the corresponding enabled
Icon. Some look and feels might not render the disabled Icon,
in which case it won't be created.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:the icon at index
/**
     * Returns the tab disabled icon at <code>index</code>.
     * If the tab disabled icon doesn't exist at <code>index</code>
     * this will forward the call to the look and feel to construct
     * an appropriate disabled Icon from the corresponding enabled
     * Icon. Some look and feels might not render the disabled Icon,
     * in which case it won't be created.
     *
     * @param index  the index of the item being queried
     * @return the icon at <code>index</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setDisabledIconAt
     */
    public Icon getDisabledIconAt(int index) {
        Page page = pages.get(index);
        if (page.disabledIcon == null) {
            page.disabledIcon = UIManager.getLookAndFeel().getDisabledIcon(this, page.icon);
        }
        return page.disabledIcon;
    }

    
Returns the tab tooltip text at index.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:a string containing the tool tip text at index
Since:1.3
/**
     * Returns the tab tooltip text at <code>index</code>.
     *
     * @param index  the index of the item being queried
     * @return a string containing the tool tip text at <code>index</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setToolTipTextAt
     * @since 1.3
     */
    public String getToolTipTextAt(int index) {
        return pages.get(index).tip;
    }

    
Returns the tab background color at index.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:the Color of the tab background at
         index
/**
     * Returns the tab background color at <code>index</code>.
     *
     * @param index  the index of the item being queried
     * @return the <code>Color</code> of the tab background at
     *          <code>index</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setBackgroundAt
     */
    public Color getBackgroundAt(int index) {
        return pages.get(index).getBackground();
    }

    
Returns the tab foreground color at index.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:the Color of the tab foreground at
         index
/**
     * Returns the tab foreground color at <code>index</code>.
     *
     * @param index  the index of the item being queried
     * @return the <code>Color</code> of the tab foreground at
     *          <code>index</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setForegroundAt
     */
    public Color getForegroundAt(int index) {
        return pages.get(index).getForeground();
    }

    
Returns whether or not the tab at index is
currently enabled.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:true if the tab at index is enabled;
         false otherwise
/**
     * Returns whether or not the tab at <code>index</code> is
     * currently enabled.
     *
     * @param index  the index of the item being queried
     * @return true if the tab at <code>index</code> is enabled;
     *          false otherwise
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setEnabledAt
     */
    public boolean isEnabledAt(int index) {
        return pages.get(index).isEnabled();
    }

    
Returns the component at index.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:the Component at index
/**
     * Returns the component at <code>index</code>.
     *
     * @param index  the index of the item being queried
     * @return the <code>Component</code> at <code>index</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setComponentAt
     */
    public Component getComponentAt(int index) {
        return pages.get(index).component;
    }

    
Returns the keyboard mnemonic for accessing the specified tab.
The mnemonic is the key which when combined with the look and feel's
mouseless modifier (usually Alt) will activate the specified
tab.

Params:
  • tabIndex – the index of the tab that the mnemonic refers to
Throws:
See Also:
Since:1.4
Returns:the key code which represents the mnemonic;
        -1 if a mnemonic is not specified for the tab
/**
     * Returns the keyboard mnemonic for accessing the specified tab.
     * The mnemonic is the key which when combined with the look and feel's
     * mouseless modifier (usually Alt) will activate the specified
     * tab.
     *
     * @since 1.4
     * @param tabIndex the index of the tab that the mnemonic refers to
     * @return the key code which represents the mnemonic;
     *         -1 if a mnemonic is not specified for the tab
     * @exception IndexOutOfBoundsException if index is out of range
     *            (<code>tabIndex</code> &lt; 0 ||
     *              <code>tabIndex</code> &gt;= tab count)
     * @see #setDisplayedMnemonicIndexAt(int,int)
     * @see #setMnemonicAt(int,int)
     */
    public int getMnemonicAt(int tabIndex) {
        checkIndex(tabIndex);

        Page page = pages.get(tabIndex);
        return page.getMnemonic();
    }

    
Returns the character, as an index, that the look and feel should
provide decoration for as representing the mnemonic character.

Params:
  • tabIndex – the index of the tab that the mnemonic refers to
Throws:
See Also:
Since:1.4
Returns:index representing mnemonic character if one exists;
   otherwise returns -1
/**
     * Returns the character, as an index, that the look and feel should
     * provide decoration for as representing the mnemonic character.
     *
     * @since 1.4
     * @param tabIndex the index of the tab that the mnemonic refers to
     * @return index representing mnemonic character if one exists;
     *    otherwise returns -1
     * @exception IndexOutOfBoundsException if index is out of range
     *            (<code>tabIndex</code> &lt; 0 ||
     *              <code>tabIndex</code> &gt;= tab count)
     * @see #setDisplayedMnemonicIndexAt(int,int)
     * @see #setMnemonicAt(int,int)
     */
    public int getDisplayedMnemonicIndexAt(int tabIndex) {
        checkIndex(tabIndex);

        Page page = pages.get(tabIndex);
        return page.getDisplayedMnemonicIndex();
    }

    
Returns the tab bounds at index.  If the tab at
this index is not currently visible in the UI, then returns
null.
If there is no UI set on this tabbedpane,
then returns null.

Params:
  • index – the index to be queried
Throws:
Returns:a Rectangle containing the tab bounds at
         index, or null if tab at
         index is not currently visible in the UI,
         or if there is no UI set on this tabbedpane
/**
     * Returns the tab bounds at <code>index</code>.  If the tab at
     * this index is not currently visible in the UI, then returns
     * <code>null</code>.
     * If there is no UI set on this <code>tabbedpane</code>,
     * then returns <code>null</code>.
     *
     * @param index the index to be queried
     * @return a <code>Rectangle</code> containing the tab bounds at
     *          <code>index</code>, or <code>null</code> if tab at
     *          <code>index</code> is not currently visible in the UI,
     *          or if there is no UI set on this <code>tabbedpane</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index &lt; 0 || index &gt;= tab count)
     */
    public Rectangle getBoundsAt(int index) {
        checkIndex(index);
        if (ui != null) {
            return ((TabbedPaneUI)ui).getTabBounds(this, index);
        }
        return null;
    }


// Setters for the Pages

    
Sets the title at index to title which
can be null.
The title is not shown if a tab component for this tab was specified.
An internal exception is raised if there is no tab at that index.

Params:
  • index – the tab index where the title should be set
  • title – the title to be displayed in the tab
Throws:
See Also:
@beaninfo
   preferred: true
   attribute: visualUpdate true
 description: The title at the specified tab index.
/**
     * Sets the title at <code>index</code> to <code>title</code> which
     * can be <code>null</code>.
     * The title is not shown if a tab component for this tab was specified.
     * An internal exception is raised if there is no tab at that index.
     *
     * @param index the tab index where the title should be set
     * @param title the title to be displayed in the tab
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index &lt; 0 || index &gt;= tab count)
     *
     * @see #getTitleAt
     * @see #setTabComponentAt
     * @beaninfo
     *    preferred: true
     *    attribute: visualUpdate true
     *  description: The title at the specified tab index.
     */
    public void setTitleAt(int index, String title) {
        Page page = pages.get(index);
        String oldTitle =page.title;
        page.title = title;

        if (oldTitle != title) {
            firePropertyChange("indexForTitle", -1, index);
        }
        page.updateDisplayedMnemonicIndex();
        if ((oldTitle != title) && (accessibleContext != null)) {
            accessibleContext.firePropertyChange(
                    AccessibleContext.ACCESSIBLE_VISIBLE_DATA_PROPERTY,
                    oldTitle, title);
        }
        if (title == null || oldTitle == null ||
            !title.equals(oldTitle)) {
            revalidate();
            repaint();
        }
    }

    
Sets the icon at index to icon which can be
null. This does not set disabled icon at icon.
If the new Icon is different than the current Icon and disabled icon
is not explicitly set, the LookAndFeel will be asked to generate a disabled
Icon. To explicitly set disabled icon, use setDisableIconAt().
The icon is not shown if a tab component for this tab was specified.
An internal exception is raised if there is no tab at that index.

Params:
  • index – the tab index where the icon should be set
  • icon – the icon to be displayed in the tab
Throws:
See Also:
@beaninfo
   preferred: true
   attribute: visualUpdate true
 description: The icon at the specified tab index.
/**
     * Sets the icon at <code>index</code> to <code>icon</code> which can be
     * <code>null</code>. This does not set disabled icon at <code>icon</code>.
     * If the new Icon is different than the current Icon and disabled icon
     * is not explicitly set, the LookAndFeel will be asked to generate a disabled
     * Icon. To explicitly set disabled icon, use <code>setDisableIconAt()</code>.
     * The icon is not shown if a tab component for this tab was specified.
     * An internal exception is raised if there is no tab at that index.
     *
     * @param index the tab index where the icon should be set
     * @param icon the icon to be displayed in the tab
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setDisabledIconAt
     * @see #getIconAt
     * @see #getDisabledIconAt
     * @see #setTabComponentAt
     * @beaninfo
     *    preferred: true
     *    attribute: visualUpdate true
     *  description: The icon at the specified tab index.
     */
    public void setIconAt(int index, Icon icon) {
        Page page = pages.get(index);
        Icon oldIcon = page.icon;
        if (icon != oldIcon) {
            page.icon = icon;

            /* If the default icon has really changed and we had
             * generated the disabled icon for this page, then
             * clear the disabledIcon field of the page.
             */
            if (page.disabledIcon instanceof UIResource) {
                page.disabledIcon = null;
            }

            // Fire the accessibility Visible data change
            if (accessibleContext != null) {
                accessibleContext.firePropertyChange(
                        AccessibleContext.ACCESSIBLE_VISIBLE_DATA_PROPERTY,
                        oldIcon, icon);
            }
            revalidate();
            repaint();
        }
    }

    
Sets the disabled icon at index to icon
which can be null.
An internal exception is raised if there is no tab at that index.

Params:
  • index – the tab index where the disabled icon should be set
  • disabledIcon – the icon to be displayed in the tab when disabled
Throws:
See Also:
@beaninfo
   preferred: true
   attribute: visualUpdate true
 description: The disabled icon at the specified tab index.
/**
     * Sets the disabled icon at <code>index</code> to <code>icon</code>
     * which can be <code>null</code>.
     * An internal exception is raised if there is no tab at that index.
     *
     * @param index the tab index where the disabled icon should be set
     * @param disabledIcon the icon to be displayed in the tab when disabled
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index &lt; 0 || index &gt;= tab count)
     *
     * @see #getDisabledIconAt
     * @beaninfo
     *    preferred: true
     *    attribute: visualUpdate true
     *  description: The disabled icon at the specified tab index.
     */
    public void setDisabledIconAt(int index, Icon disabledIcon) {
        Icon oldIcon = pages.get(index).disabledIcon;
        pages.get(index).disabledIcon = disabledIcon;
        if (disabledIcon != oldIcon && !isEnabledAt(index)) {
            revalidate();
            repaint();
        }
    }

    
Sets the tooltip text at index to toolTipText
which can be null.
An internal exception is raised if there is no tab at that index.

Params:
  • index – the tab index where the tooltip text should be set
  • toolTipText – the tooltip text to be displayed for the tab
Throws:
See Also:
@beaninfo
   preferred: true
 description: The tooltip text at the specified tab index.
Since:1.3
/**
     * Sets the tooltip text at <code>index</code> to <code>toolTipText</code>
     * which can be <code>null</code>.
     * An internal exception is raised if there is no tab at that index.
     *
     * @param index the tab index where the tooltip text should be set
     * @param toolTipText the tooltip text to be displayed for the tab
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index &lt; 0 || index &gt;= tab count)
     *
     * @see #getToolTipTextAt
     * @beaninfo
     *    preferred: true
     *  description: The tooltip text at the specified tab index.
     * @since 1.3
     */
    public void setToolTipTextAt(int index, String toolTipText) {
        String oldToolTipText = pages.get(index).tip;
        pages.get(index).tip = toolTipText;

        if ((oldToolTipText != toolTipText) && (accessibleContext != null)) {
            accessibleContext.firePropertyChange(
                    AccessibleContext.ACCESSIBLE_VISIBLE_DATA_PROPERTY,
                    oldToolTipText, toolTipText);
        }
        if (!haveRegistered && toolTipText != null) {
            ToolTipManager.sharedInstance().registerComponent(this);
            haveRegistered = true;
        }
    }

    
Sets the background color at index to
background
which can be null, in which case the tab's background color
will default to the background color of the tabbedpane.
An internal exception is raised if there is no tab at that index.

Params:
  • index – the tab index where the background should be set
  • background – the color to be displayed in the tab's background
Throws:
See Also:
@beaninfo
   preferred: true
   attribute: visualUpdate true
 description: The background color at the specified tab index.
/**
     * Sets the background color at <code>index</code> to
     * <code>background</code>
     * which can be <code>null</code>, in which case the tab's background color
     * will default to the background color of the <code>tabbedpane</code>.
     * An internal exception is raised if there is no tab at that index.
     * @param index the tab index where the background should be set
     * @param background the color to be displayed in the tab's background
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index &lt; 0 || index &gt;= tab count)
     *
     * @see #getBackgroundAt
     * @beaninfo
     *    preferred: true
     *    attribute: visualUpdate true
     *  description: The background color at the specified tab index.
     */
    public void setBackgroundAt(int index, Color background) {
        Color oldBg = pages.get(index).background;
        pages.get(index).setBackground(background);
        if (background == null || oldBg == null ||
            !background.equals(oldBg)) {
            Rectangle tabBounds = getBoundsAt(index);
            if (tabBounds != null) {
                repaint(tabBounds);
            }
        }
    }

    
Sets the foreground color at index to
foreground which can be
null, in which case the tab's foreground color
will default to the foreground color of this tabbedpane.
An internal exception is raised if there is no tab at that index.

Params:
  • index – the tab index where the foreground should be set
  • foreground – the color to be displayed as the tab's foreground
Throws:
See Also:
@beaninfo
   preferred: true
   attribute: visualUpdate true
 description: The foreground color at the specified tab index.
/**
     * Sets the foreground color at <code>index</code> to
     * <code>foreground</code> which can be
     * <code>null</code>, in which case the tab's foreground color
     * will default to the foreground color of this <code>tabbedpane</code>.
     * An internal exception is raised if there is no tab at that index.
     *
     * @param index the tab index where the foreground should be set
     * @param foreground the color to be displayed as the tab's foreground
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index &lt; 0 || index &gt;= tab count)
     *
     * @see #getForegroundAt
     * @beaninfo
     *    preferred: true
     *    attribute: visualUpdate true
     *  description: The foreground color at the specified tab index.
     */
    public void setForegroundAt(int index, Color foreground) {
        Color oldFg = pages.get(index).foreground;
        pages.get(index).setForeground(foreground);
        if (foreground == null || oldFg == null ||
            !foreground.equals(oldFg)) {
            Rectangle tabBounds = getBoundsAt(index);
            if (tabBounds != null) {
                repaint(tabBounds);
            }
        }
    }

    
Sets whether or not the tab at index is enabled.
An internal exception is raised if there is no tab at that index.

Params:
  • index – the tab index which should be enabled/disabled
  • enabled – whether or not the tab should be enabled
Throws:
See Also:
/**
     * Sets whether or not the tab at <code>index</code> is enabled.
     * An internal exception is raised if there is no tab at that index.
     *
     * @param index the tab index which should be enabled/disabled
     * @param enabled whether or not the tab should be enabled
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index &lt; 0 || index &gt;= tab count)
     *
     * @see #isEnabledAt
     */
    public void setEnabledAt(int index, boolean enabled) {
        boolean oldEnabled = pages.get(index).isEnabled();
        pages.get(index).setEnabled(enabled);
        if (enabled != oldEnabled) {
            revalidate();
            repaint();
        }
    }

    
Sets the component at index to component.
An internal exception is raised if there is no tab at that index.

Params:
  • index – the tab index where this component is being placed
  • component – the component for the tab
Throws:
See Also:
@beaninfo
   attribute: visualUpdate true
 description: The component at the specified tab index.
/**
     * Sets the component at <code>index</code> to <code>component</code>.
     * An internal exception is raised if there is no tab at that index.
     *
     * @param index the tab index where this component is being placed
     * @param component the component for the tab
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index &lt; 0 || index &gt;= tab count)
     *
     * @see #getComponentAt
     * @beaninfo
     *    attribute: visualUpdate true
     *  description: The component at the specified tab index.
     */
    public void setComponentAt(int index, Component component) {
        Page page = pages.get(index);
        if (component != page.component) {
            boolean shouldChangeFocus = false;

            if (page.component != null) {
                shouldChangeFocus =
                    (SwingUtilities.findFocusOwner(page.component) != null);

                // REMIND(aim): this is really silly;
                // why not if (page.component.getParent() == this) remove(component)
                synchronized(getTreeLock()) {
                    int count = getComponentCount();
                    Component children[] = getComponents();
                    for (int i = 0; i < count; i++) {
                        if (children[i] == page.component) {
                            super.remove(i);
                        }
                    }
                }
            }

            page.component = component;
            boolean selectedPage = (getSelectedIndex() == index);

            if (selectedPage) {
                this.visComp = component;
            }

            if (component != null) {
                component.setVisible(selectedPage);
                addImpl(component, null, -1);

                if (shouldChangeFocus) {
                    SwingUtilities2.tabbedPaneChangeFocusTo(component);
                }
            } else {
                repaint();
            }

            revalidate();
        }
    }

    
Provides a hint to the look and feel as to which character in the
text should be decorated to represent the mnemonic. Not all look and
feels may support this. A value of -1 indicates either there is
no mnemonic for this tab, or you do not wish the mnemonic to be
displayed for this tab.


The value of this is updated as the properties relating to the
mnemonic change (such as the mnemonic itself, the text...).
You should only ever have to call this if
you do not wish the default character to be underlined. For example, if
the text at tab index 3 was 'Apple Price', with a mnemonic of 'p',
and you wanted the 'P'
to be decorated, as 'Apple Price', you would have to invoke
setDisplayedMnemonicIndex(3, 6) after invoking
setMnemonicAt(3, KeyEvent.VK_P).

Note that it is the programmer's responsibility to ensure
that each tab has a unique mnemonic or unpredictable results may
occur.

Params:
  • tabIndex – the index of the tab that the mnemonic refers to
  • mnemonicIndex – index into the String to underline
Throws:
See Also:
Since:1.4
@beaninfo
       bound: true
   attribute: visualUpdate true
 description: the index into the String to draw the keyboard character
              mnemonic at
/**
     * Provides a hint to the look and feel as to which character in the
     * text should be decorated to represent the mnemonic. Not all look and
     * feels may support this. A value of -1 indicates either there is
     * no mnemonic for this tab, or you do not wish the mnemonic to be
     * displayed for this tab.
     * <p>
     * The value of this is updated as the properties relating to the
     * mnemonic change (such as the mnemonic itself, the text...).
     * You should only ever have to call this if
     * you do not wish the default character to be underlined. For example, if
     * the text at tab index 3 was 'Apple Price', with a mnemonic of 'p',
     * and you wanted the 'P'
     * to be decorated, as 'Apple <u>P</u>rice', you would have to invoke
     * <code>setDisplayedMnemonicIndex(3, 6)</code> after invoking
     * <code>setMnemonicAt(3, KeyEvent.VK_P)</code>.
     * <p>Note that it is the programmer's responsibility to ensure
     * that each tab has a unique mnemonic or unpredictable results may
     * occur.
     *
     * @since 1.4
     * @param tabIndex the index of the tab that the mnemonic refers to
     * @param mnemonicIndex index into the <code>String</code> to underline
     * @exception IndexOutOfBoundsException if <code>tabIndex</code> is
     *            out of range (<code>tabIndex < 0 || tabIndex >= tab
     *            count</code>)
     * @exception IllegalArgumentException will be thrown if
     *            <code>mnemonicIndex</code> is &gt;= length of the tab
     *            title , or &lt; -1
     * @see #setMnemonicAt(int,int)
     * @see #getDisplayedMnemonicIndexAt(int)
     *
     * @beaninfo
     *        bound: true
     *    attribute: visualUpdate true
     *  description: the index into the String to draw the keyboard character
     *               mnemonic at
     */
    public void setDisplayedMnemonicIndexAt(int tabIndex, int mnemonicIndex) {
        checkIndex(tabIndex);

        Page page = pages.get(tabIndex);

        page.setDisplayedMnemonicIndex(mnemonicIndex);
    }

    
Sets the keyboard mnemonic for accessing the specified tab.
The mnemonic is the key which when combined with the look and feel's
mouseless modifier (usually Alt) will activate the specified
tab.


A mnemonic must correspond to a single key on the keyboard
and should be specified using one of the VK_XXX
keycodes defined in java.awt.event.KeyEvent.
Mnemonics are case-insensitive, therefore a key event
with the corresponding keycode would cause the button to be
activated whether or not the Shift modifier was pressed.


This will update the displayed mnemonic property for the specified
tab.

Params:
  • tabIndex – the index of the tab that the mnemonic refers to
  • mnemonic – the key code which represents the mnemonic
Throws:
See Also:
Since:1.4
@beaninfo
       bound: true
   attribute: visualUpdate true
 description: The keyboard mnenmonic, as a KeyEvent VK constant,
              for the specified tab
/**
     * Sets the keyboard mnemonic for accessing the specified tab.
     * The mnemonic is the key which when combined with the look and feel's
     * mouseless modifier (usually Alt) will activate the specified
     * tab.
     * <p>
     * A mnemonic must correspond to a single key on the keyboard
     * and should be specified using one of the <code>VK_XXX</code>
     * keycodes defined in <code>java.awt.event.KeyEvent</code>.
     * Mnemonics are case-insensitive, therefore a key event
     * with the corresponding keycode would cause the button to be
     * activated whether or not the Shift modifier was pressed.
     * <p>
     * This will update the displayed mnemonic property for the specified
     * tab.
     *
     * @since 1.4
     * @param tabIndex the index of the tab that the mnemonic refers to
     * @param mnemonic the key code which represents the mnemonic
     * @exception IndexOutOfBoundsException if <code>tabIndex</code> is out
     *            of range (<code>tabIndex < 0 || tabIndex >= tab count</code>)
     * @see #getMnemonicAt(int)
     * @see #setDisplayedMnemonicIndexAt(int,int)
     *
     * @beaninfo
     *        bound: true
     *    attribute: visualUpdate true
     *  description: The keyboard mnenmonic, as a KeyEvent VK constant,
     *               for the specified tab
     */
    public void setMnemonicAt(int tabIndex, int mnemonic) {
        checkIndex(tabIndex);

        Page page = pages.get(tabIndex);
        page.setMnemonic(mnemonic);

        firePropertyChange("mnemonicAt", null, null);
    }

// end of Page setters

    
Returns the first tab index with a given title,  or
-1 if no tab has this title.

Params:
  • title – the title for the tab
Returns:the first tab index which matches title, or
         -1 if no tab has this title
/**
     * Returns the first tab index with a given <code>title</code>,  or
     * -1 if no tab has this title.
     *
     * @param title the title for the tab
     * @return the first tab index which matches <code>title</code>, or
     *          -1 if no tab has this title
     */
    public int indexOfTab(String title) {
        for(int i = 0; i < getTabCount(); i++) {
            if (getTitleAt(i).equals(title == null? "" : title)) {
                return i;
            }
        }
        return -1;
    }

    
Returns the first tab index with a given icon,
or -1 if no tab has this icon.

Params:
  • icon – the icon for the tab
Returns:the first tab index which matches icon,
         or -1 if no tab has this icon
/**
     * Returns the first tab index with a given <code>icon</code>,
     * or -1 if no tab has this icon.
     *
     * @param icon the icon for the tab
     * @return the first tab index which matches <code>icon</code>,
     *          or -1 if no tab has this icon
     */
    public int indexOfTab(Icon icon) {
        for(int i = 0; i < getTabCount(); i++) {
            Icon tabIcon = getIconAt(i);
            if ((tabIcon != null && tabIcon.equals(icon)) ||
                (tabIcon == null && tabIcon == icon)) {
                return i;
            }
        }
        return -1;
    }

    
Returns the index of the tab for the specified component.
Returns -1 if there is no tab for this component.

Params:
  • component – the component for the tab
Returns:the first tab which matches this component, or -1
         if there is no tab for this component
/**
     * Returns the index of the tab for the specified component.
     * Returns -1 if there is no tab for this component.
     *
     * @param component the component for the tab
     * @return the first tab which matches this component, or -1
     *          if there is no tab for this component
     */
    public int indexOfComponent(Component component) {
        for(int i = 0; i < getTabCount(); i++) {
            Component c = getComponentAt(i);
            if ((c != null && c.equals(component)) ||
                (c == null && c == component)) {
                return i;
            }
        }
        return -1;
    }

    
Returns the tab index corresponding to the tab whose bounds
intersect the specified location.  Returns -1 if no tab
intersects the location.

Params:
  • x – the x location relative to this tabbedpane
  • y – the y location relative to this tabbedpane
Returns:the tab index which intersects the location, or
        -1 if no tab intersects the location
Since:1.4
/**
     * Returns the tab index corresponding to the tab whose bounds
     * intersect the specified location.  Returns -1 if no tab
     * intersects the location.
     *
     * @param x the x location relative to this tabbedpane
     * @param y the y location relative to this tabbedpane
     * @return the tab index which intersects the location, or
     *         -1 if no tab intersects the location
     * @since 1.4
     */
    public int indexAtLocation(int x, int y) {
        if (ui != null) {
            return ((TabbedPaneUI)ui).tabForCoordinate(this, x, y);
        }
        return -1;
    }


    
Returns the tooltip text for the component determined by the
mouse event location.

Params:
  • event –  the MouseEvent that tells where the
         cursor is lingering
Returns:the String containing the tooltip text
/**
     * Returns the tooltip text for the component determined by the
     * mouse event location.
     *
     * @param event  the <code>MouseEvent</code> that tells where the
     *          cursor is lingering
     * @return the <code>String</code> containing the tooltip text
     */
    public String getToolTipText(MouseEvent event) {
        if (ui != null) {
            int index = ((TabbedPaneUI)ui).tabForCoordinate(this, event.getX(), event.getY());

            if (index != -1) {
                return pages.get(index).tip;
            }
        }
        return super.getToolTipText(event);
    }

    private void checkIndex(int index) {
        if (index < 0 || index >= pages.size()) {
            throw new IndexOutOfBoundsException("Index: "+index+", Tab count: "+pages.size());
        }
    }


    
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 {
        s.defaultWriteObject();
        if (getUIClassID().equals(uiClassID)) {
            byte count = JComponent.getWriteObjCounter(this);
            JComponent.setWriteObjCounter(this, --count);
            if (count == 0 && ui != null) {
                ui.installUI(this);
            }
        }
    }

    /* Called from the <code>JComponent</code>'s
     * <code>EnableSerializationFocusListener</code> to
     * do any Swing-specific pre-serialization configuration.
     */
    void compWriteObjectNotify() {
        super.compWriteObjectNotify();
        // If ToolTipText != null, then the tooltip has already been
        // unregistered by JComponent.compWriteObjectNotify()
        if (getToolTipText() == null && haveRegistered) {
            ToolTipManager.sharedInstance().unregisterComponent(this);
        }
    }

    
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(ObjectInputStream s)
        throws IOException, ClassNotFoundException
    {
        s.defaultReadObject();
        if ((ui != null) && (getUIClassID().equals(uiClassID))) {
            ui.installUI(this);
        }
        // If ToolTipText != null, then the tooltip has already been
        // registered by JComponent.readObject()
        if (getToolTipText() == null && haveRegistered) {
            ToolTipManager.sharedInstance().registerComponent(this);
        }
    }


    
Returns a string representation of this JTabbedPane.
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 JTabbedPane.
/**
     * Returns a string representation of this <code>JTabbedPane</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 JTabbedPane.
     */
    protected String paramString() {
        String tabPlacementString;
        if (tabPlacement == TOP) {
            tabPlacementString = "TOP";
        } else if (tabPlacement == BOTTOM) {
            tabPlacementString = "BOTTOM";
        } else if (tabPlacement == LEFT) {
            tabPlacementString = "LEFT";
        } else if (tabPlacement == RIGHT) {
            tabPlacementString = "RIGHT";
        } else tabPlacementString = "";
        String haveRegisteredString = (haveRegistered ?
                                       "true" : "false");

        return super.paramString() +
        ",haveRegistered=" + haveRegisteredString +
        ",tabPlacement=" + tabPlacementString;
    }

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

    
Gets the AccessibleContext associated with this JTabbedPane.
For tabbed panes, the AccessibleContext takes the form of an
AccessibleJTabbedPane.
A new AccessibleJTabbedPane instance is created if necessary.

Returns:an AccessibleJTabbedPane that serves as the
        AccessibleContext of this JTabbedPane
/**
     * Gets the AccessibleContext associated with this JTabbedPane.
     * For tabbed panes, the AccessibleContext takes the form of an
     * AccessibleJTabbedPane.
     * A new AccessibleJTabbedPane instance is created if necessary.
     *
     * @return an AccessibleJTabbedPane that serves as the
     *         AccessibleContext of this JTabbedPane
     */
    public AccessibleContext getAccessibleContext() {
        if (accessibleContext == null) {
            accessibleContext = new AccessibleJTabbedPane();

            // initialize AccessibleContext for the existing pages
            int count = getTabCount();
            for (int i = 0; i < count; i++) {
                pages.get(i).initAccessibleContext();
            }
        }
        return accessibleContext;
    }

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


Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeansTM
has been added to the java.beans package. Please see XMLEncoder. 
/**
     * This class implements accessibility support for the
     * <code>JTabbedPane</code> class.  It provides an implementation of the
     * Java Accessibility API appropriate to tabbed pane user-interface
     * elements.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases. The current serialization support is
     * appropriate for short term storage or RMI between applications running
     * the same version of Swing.  As of 1.4, support for long term storage
     * of all JavaBeans<sup><font size="-2">TM</font></sup>
     * has been added to the <code>java.beans</code> package.
     * Please see {@link java.beans.XMLEncoder}.
     */
    protected class AccessibleJTabbedPane extends AccessibleJComponent
        implements AccessibleSelection, ChangeListener {

        
Returns the accessible name of this object, or null if there is no accessible name. 
Returns:the accessible name of this object, nor null.
Since:1.6
/**
         * Returns the accessible name of this object, or {@code null} if
         * there is no accessible name.
         *
         * @return the accessible name of this object, nor {@code null}.
         * @since 1.6
         */
        public String getAccessibleName() {
            if (accessibleName != null) {
                return accessibleName;
            }

            String cp = (String)getClientProperty(AccessibleContext.ACCESSIBLE_NAME_PROPERTY);

            if (cp != null) {
                return cp;
            }

            int index = getSelectedIndex();

            if (index >= 0) {
                return pages.get(index).getAccessibleName();
            }

            return super.getAccessibleName();
        }

        
 Constructs an AccessibleJTabbedPane

/**
         *  Constructs an AccessibleJTabbedPane
         */
        public AccessibleJTabbedPane() {
            super();
            JTabbedPane.this.model.addChangeListener(this);
        }

        public void stateChanged(ChangeEvent e) {
            Object o = e.getSource();
            firePropertyChange(AccessibleContext.ACCESSIBLE_SELECTION_PROPERTY,
                               null, o);
        }

        
Get the role of this object.

Returns:an instance of AccessibleRole describing the role of
         the object
/**
         * Get the role of this object.
         *
         * @return an instance of AccessibleRole describing the role of
         *          the object
         */
        public AccessibleRole getAccessibleRole() {
            return AccessibleRole.PAGE_TAB_LIST;
        }

        
Returns the number of accessible children in the object.

Returns:the number of accessible children in the object.
/**
         * Returns the number of accessible children in the object.
         *
         * @return the number of accessible children in the object.
         */
        public int getAccessibleChildrenCount() {
            return getTabCount();
        }

        
Return the specified Accessible child of the object.

Params:
  • i – zero-based index of child
Throws:
Returns:the Accessible child of the object
/**
         * Return the specified Accessible child of the object.
         *
         * @param i zero-based index of child
         * @return the Accessible child of the object
         * @exception IllegalArgumentException if index is out of bounds
         */
        public Accessible getAccessibleChild(int i) {
            if (i < 0 || i >= getTabCount()) {
                return null;
            }
            return pages.get(i);
        }

        
Gets the AccessibleSelection associated with
this object.  In the implementation of the Java
Accessibility API for this class,
returns this object, which is responsible for implementing the
AccessibleSelection interface on behalf of itself.

Returns:this object
/**
         * Gets the <code>AccessibleSelection</code> associated with
         * this object.  In the implementation of the Java
         * Accessibility API for this class,
         * returns this object, which is responsible for implementing the
         * <code>AccessibleSelection</code> interface on behalf of itself.
         *
         * @return this object
         */
        public AccessibleSelection getAccessibleSelection() {
           return this;
        }

        
Returns the Accessible child contained at
the local coordinate Point, if one exists.
Otherwise returns the currently selected tab.

Returns:the Accessible at the specified
   location, if it exists
/**
         * Returns the <code>Accessible</code> child contained at
         * the local coordinate <code>Point</code>, if one exists.
         * Otherwise returns the currently selected tab.
         *
         * @return the <code>Accessible</code> at the specified
         *    location, if it exists
         */
        public Accessible getAccessibleAt(Point p) {
            int tab = ((TabbedPaneUI) ui).tabForCoordinate(JTabbedPane.this,
                                                           p.x, p.y);
            if (tab == -1) {
                tab = getSelectedIndex();
            }
            return getAccessibleChild(tab);
        }

        public int getAccessibleSelectionCount() {
            return 1;
        }

        public Accessible getAccessibleSelection(int i) {
            int index = getSelectedIndex();
            if (index == -1) {
                return null;
            }
            return pages.get(index);
        }

        public boolean isAccessibleChildSelected(int i) {
            return (i == getSelectedIndex());
        }

        public void addAccessibleSelection(int i) {
           setSelectedIndex(i);
        }

        public void removeAccessibleSelection(int i) {
           // can't do
        }

        public void clearAccessibleSelection() {
           // can't do
        }

        public void selectAllAccessibleSelection() {
           // can't do
        }
    }

    private class Page extends AccessibleContext
        implements Serializable, Accessible, AccessibleComponent {
        String title;
        Color background;
        Color foreground;
        Icon icon;
        Icon disabledIcon;
        JTabbedPane parent;
        Component component;
        String tip;
        boolean enabled = true;
        boolean needsUIUpdate;
        int mnemonic = -1;
        int mnemonicIndex = -1;
        Component tabComponent;

        Page(JTabbedPane parent,
             String title, Icon icon, Icon disabledIcon, Component component, String tip) {
            this.title = title;
            this.icon = icon;
            this.disabledIcon = disabledIcon;
            this.parent = parent;
            this.setAccessibleParent(parent);
            this.component = component;
            this.tip = tip;

            initAccessibleContext();
        }

        /*
         * initializes the AccessibleContext for the page
         */
        void initAccessibleContext() {
            if (JTabbedPane.this.accessibleContext != null &&
                component instanceof Accessible) {
                /*
                 * Do initialization if the AccessibleJTabbedPane
                 * has been instantiated. We do not want to load
                 * Accessibility classes unnecessarily.
                 */
                AccessibleContext ac;
                ac = component.getAccessibleContext();
                if (ac != null) {
                    ac.setAccessibleParent(this);
                }
            }
        }

        void setMnemonic(int mnemonic) {
            this.mnemonic = mnemonic;
            updateDisplayedMnemonicIndex();
        }

        int getMnemonic() {
            return mnemonic;
        }

        /*
         * Sets the page displayed mnemonic index
         */
        void setDisplayedMnemonicIndex(int mnemonicIndex) {
            if (this.mnemonicIndex != mnemonicIndex) {
                if (mnemonicIndex != -1 && (title == null ||
                        mnemonicIndex < 0 ||
                        mnemonicIndex >= title.length())) {
                    throw new IllegalArgumentException(
                                "Invalid mnemonic index: " + mnemonicIndex);
                }
                this.mnemonicIndex = mnemonicIndex;
                JTabbedPane.this.firePropertyChange("displayedMnemonicIndexAt",
                                                    null, null);
            }
        }

        /*
         * Returns the page displayed mnemonic index
         */
        int getDisplayedMnemonicIndex() {
            return this.mnemonicIndex;
        }

        void updateDisplayedMnemonicIndex() {
            setDisplayedMnemonicIndex(
                SwingUtilities.findDisplayedMnemonicIndex(title, mnemonic));
        }

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

        public AccessibleContext getAccessibleContext() {
            return this;
        }


        // AccessibleContext methods

        public String getAccessibleName() {
            if (accessibleName != null) {
                return accessibleName;
            } else if (title != null) {
                return title;
            }
            return null;
        }

        public String getAccessibleDescription() {
            if (accessibleDescription != null) {
                return accessibleDescription;
            } else if (tip != null) {
                return tip;
            }
            return null;
        }

        public AccessibleRole getAccessibleRole() {
            return AccessibleRole.PAGE_TAB;
        }

        public AccessibleStateSet getAccessibleStateSet() {
            AccessibleStateSet states;
            states = parent.getAccessibleContext().getAccessibleStateSet();
            states.add(AccessibleState.SELECTABLE);
            int i = parent.indexOfTab(title);
            if (i == parent.getSelectedIndex()) {
                states.add(AccessibleState.SELECTED);
            }
            return states;
        }

        public int getAccessibleIndexInParent() {
            return parent.indexOfTab(title);
        }

        public int getAccessibleChildrenCount() {
            if (component instanceof Accessible) {
                return 1;
            } else {
                return 0;
            }
        }

        public Accessible getAccessibleChild(int i) {
            if (component instanceof Accessible) {
                return (Accessible) component;
            } else {
                return null;
            }
        }

        public Locale getLocale() {
            return parent.getLocale();
        }

        public AccessibleComponent getAccessibleComponent() {
            return this;
        }


        // AccessibleComponent methods

        public Color getBackground() {
            return background != null? background : parent.getBackground();
        }

        public void setBackground(Color c) {
            background = c;
        }

        public Color getForeground() {
            return foreground != null? foreground : parent.getForeground();
        }

        public void setForeground(Color c) {
            foreground = c;
        }

        public Cursor getCursor() {
            return parent.getCursor();
        }

        public void setCursor(Cursor c) {
            parent.setCursor(c);
        }

        public Font getFont() {
            return parent.getFont();
        }

        public void setFont(Font f) {
            parent.setFont(f);
        }

        public FontMetrics getFontMetrics(Font f) {
            return parent.getFontMetrics(f);
        }

        public boolean isEnabled() {
            return enabled;
        }

        public void setEnabled(boolean b) {
            enabled = b;
        }

        public boolean isVisible() {
            return parent.isVisible();
        }

        public void setVisible(boolean b) {
            parent.setVisible(b);
        }

        public boolean isShowing() {
            return parent.isShowing();
        }

        public boolean contains(Point p) {
            Rectangle r = getBounds();
            return r.contains(p);
        }

        public Point getLocationOnScreen() {
             Point parentLocation = parent.getLocationOnScreen();
             Point componentLocation = getLocation();
             componentLocation.translate(parentLocation.x, parentLocation.y);
             return componentLocation;
        }

        public Point getLocation() {
             Rectangle r = getBounds();
             return new Point(r.x, r.y);
        }

        public void setLocation(Point p) {
            // do nothing
        }

        public Rectangle getBounds() {
            return parent.getUI().getTabBounds(parent,
                                               parent.indexOfTab(title));
        }

        public void setBounds(Rectangle r) {
            // do nothing
        }

        public Dimension getSize() {
            Rectangle r = getBounds();
            return new Dimension(r.width, r.height);
        }

        public void setSize(Dimension d) {
            // do nothing
        }

        public Accessible getAccessibleAt(Point p) {
            if (component instanceof Accessible) {
                return (Accessible) component;
            } else {
                return null;
            }
        }

        public boolean isFocusTraversable() {
            return false;
        }

        public void requestFocus() {
            // do nothing
        }

        public void addFocusListener(FocusListener l) {
            // do nothing
        }

        public void removeFocusListener(FocusListener l) {
            // do nothing
        }

        // TIGER - 4732339
        
Returns an AccessibleIcon

Returns:the enabled icon if one exists and the page
is enabled. Otherwise, returns the disabled icon if
one exists and the page is disabled.  Otherwise, null
is returned.
/**
         * Returns an AccessibleIcon
         *
         * @return the enabled icon if one exists and the page
         * is enabled. Otherwise, returns the disabled icon if
         * one exists and the page is disabled.  Otherwise, null
         * is returned.
         */
        public AccessibleIcon [] getAccessibleIcon() {
            AccessibleIcon accessibleIcon = null;
            if (enabled && icon instanceof ImageIcon) {
                AccessibleContext ac =
                    ((ImageIcon)icon).getAccessibleContext();
                accessibleIcon = (AccessibleIcon)ac;
            } else if (!enabled && disabledIcon instanceof ImageIcon) {
                AccessibleContext ac =
                    ((ImageIcon)disabledIcon).getAccessibleContext();
                accessibleIcon = (AccessibleIcon)ac;
            }
            if (accessibleIcon != null) {
                AccessibleIcon [] returnIcons = new AccessibleIcon[1];
                returnIcons[0] = accessibleIcon;
                return returnIcons;
            } else {
                return null;
            }
        }
    }

    
Sets the component that is responsible for rendering the
title for the specified tab.  A null value means
JTabbedPane will render the title and/or icon for
the specified tab.  A non-null value means the component will
render the title and JTabbedPane will not render
the title and/or icon.


Note: The component must not be one that the developer has
      already added to the tabbed pane.

Params:
  • index – the tab index where the component should be set
  • component – the component to render the title for the
                 specified tab
Throws:
See Also:
@beaninfo
   preferred: true
   attribute: visualUpdate true
 description: The tab component at the specified tab index.
Since:1.6
/**
    * Sets the component that is responsible for rendering the
    * title for the specified tab.  A null value means
    * <code>JTabbedPane</code> will render the title and/or icon for
    * the specified tab.  A non-null value means the component will
    * render the title and <code>JTabbedPane</code> will not render
    * the title and/or icon.
    * <p>
    * Note: The component must not be one that the developer has
    *       already added to the tabbed pane.
    *
    * @param index the tab index where the component should be set
    * @param component the component to render the title for the
    *                  specified tab
    * @exception IndexOutOfBoundsException if index is out of range
    *            (index < 0 || index >= tab count)
    * @exception IllegalArgumentException if component has already been
    *            added to this <code>JTabbedPane</code>
    *
    * @see #getTabComponentAt
    * @beaninfo
    *    preferred: true
    *    attribute: visualUpdate true
    *  description: The tab component at the specified tab index.
    * @since 1.6
    */
    public void setTabComponentAt(int index, Component component) {
        if (component != null && indexOfComponent(component) != -1) {
            throw new IllegalArgumentException("Component is already added to this JTabbedPane");
        }
        Component oldValue = getTabComponentAt(index);
        if (component != oldValue) {
            int tabComponentIndex = indexOfTabComponent(component);
            if (tabComponentIndex != -1) {
                setTabComponentAt(tabComponentIndex, null);
            }
            pages.get(index).tabComponent = component;
            firePropertyChange("indexForTabComponent", -1, index);
        }
    }

    
Returns the tab component at index.

Params:
  • index –  the index of the item being queried
Throws:
See Also:
Returns:the tab component at index
Since:1.6
/**
     * Returns the tab component at <code>index</code>.
     *
     * @param index  the index of the item being queried
     * @return the tab component at <code>index</code>
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     *
     * @see #setTabComponentAt
     * @since 1.6
     */
    public Component getTabComponentAt(int index) {
        return pages.get(index).tabComponent;
    }

    
Returns the index of the tab for the specified tab component.
Returns -1 if there is no tab for this tab component.

Params:
  • tabComponent – the tab component for the tab
See Also:
Returns:the first tab which matches this tab component, or -1
         if there is no tab for this tab component
Since:1.6
/**
     * Returns the index of the tab for the specified tab component.
     * Returns -1 if there is no tab for this tab component.
     *
     * @param tabComponent the tab component for the tab
     * @return the first tab which matches this tab component, or -1
     *          if there is no tab for this tab component
     * @see #setTabComponentAt
     * @see #getTabComponentAt
     * @since 1.6
     */
     public int indexOfTabComponent(Component tabComponent) {
        for(int i = 0; i < getTabCount(); i++) {
            Component c = getTabComponentAt(i);
            if (c == tabComponent) {
                return i;
            }
        }
        return -1;
    }
}