JFrame.java

/*
 * Copyright (c) 1997, 2024, 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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packagejavax.swing;

importjava.awt.AWTEvent;
importjava.awt.BorderLayout;
importjava.awt.Component;
importjava.awt.Container;
importjava.awt.Frame;
importjava.awt.Graphics;
importjava.awt.GraphicsConfiguration;
importjava.awt.HeadlessException;
importjava.awt.Image;
importjava.awt.LayoutManager;
importjava.awt.event.WindowEvent;

importjava.beans.JavaBean;
importjava.beans.BeanProperty;

importjavax.accessibility.Accessible;
importjavax.accessibility.AccessibleContext;
importjavax.accessibility.AccessibleState;
importjavax.accessibility.AccessibleStateSet;

/**
 * An extended version of <code>java.awt.Frame</code> that adds support for
 * the JFC/Swing component architecture.
 * You can find task-oriented documentation about using <code>JFrame</code>
 * in <em>The Java Tutorial</em>, in the section
 * <a
 href="https://docs.oracle.com/javase/tutorial/uiswing/components/frame.html">How to Make Frames</a>.
 *
 * <p>
 * The <code>JFrame</code> class is slightly incompatible with <code>Frame</code>.
 * Like all other JFC/Swing top-level containers,
 * a <code>JFrame</code> contains a <code>JRootPane</code> as its only child.
 * The <b>content pane</b> provided by the root pane should,
 * as a rule, contain
 * all the non-menu components displayed by the <code>JFrame</code>.
 * This is different from the AWT <code>Frame</code> case.
 * As a convenience, the {@code add}, {@code remove}, and {@code setLayout}
 * methods of this class are overridden, so that they delegate calls
 * to the corresponding methods of the {@code ContentPane}.
 * For example, you can add a child component to a frame as follows:
 * <pre>
 * frame.add(child);
 * </pre>
 * And the child will be added to the contentPane.
 * The content pane will
 * always be non-null. Attempting to set it to null will cause the JFrame
 * to throw an exception. The default content pane will have a BorderLayout
 * manager set on it.
 * Refer to {@link javax.swing.RootPaneContainer}
 * for details on adding, removing and setting the <code>LayoutManager</code>
 * of a <code>JFrame</code>.
 * <p>
 * Unlike a <code>Frame</code>, a <code>JFrame</code> has some notion of how to
 * respond when the user attempts to close the window. The default behavior
 * is to simply hide the JFrame when the user closes the window. To change the
 * default behavior, you invoke the method
 * {@link #setDefaultCloseOperation}.
 * To make the <code>JFrame</code> behave the same as a <code>Frame</code>
 * instance, use
 * <code>setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE)</code>.
 * <p>
 * For more information on content panes
 * and other features that root panes provide,
 * see <a
 href="https://docs.oracle.com/javase/tutorial/uiswing/components/toplevel.html">Using Top-Level Containers</a> in <em>The Java Tutorial</em>.
 * <p>
 * In a multi-screen environment, you can create a <code>JFrame</code>
 * on a different screen device. See {@link java.awt.Frame} for more
 * information.
 * <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
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @see JRootPane
 * @see #setDefaultCloseOperation
 * @see java.awt.event.WindowListener#windowClosing
 * @see javax.swing.RootPaneContainer
 *
 * @author Jeff Dinkins
 * @author Georges Saab
 * @author David Kloba
 * @since 1.2
 */
@JavaBean(defaultProperty = "JMenuBar", description = "A toplevel window which can be minimized to an icon.")
@SwingContainer(delegate = "getContentPane")
@SuppressWarnings("serial") // Same-version serialization only
publicclassJFrameextendsFrameimplementsWindowConstants,
Accessible,
RootPaneContainer,
TransferHandler.HasGetTransferHandler
{
/**
 * Key into the AppContext, used to check if should provide decorations
 * by default.
 */
privatestaticfinalObjectdefaultLookAndFeelDecoratedKey =
newStringBuffer("JFrame.defaultLookAndFeelDecorated");

privateintdefaultCloseOperation = HIDE_ON_CLOSE;

/**
 * The <code>TransferHandler</code> for this frame.
 */
privateTransferHandlertransferHandler;

/**
 * The <code>JRootPane</code> instance that manages the
 * <code>contentPane</code>
 * and optional <code>menuBar</code> for this frame, as well as the
 * <code>glassPane</code>.
 *
 * @see JRootPane
 * @see RootPaneContainer
 */
protectedJRootPanerootPane;

/**
 * If true then calls to <code>add</code> and <code>setLayout</code>
 * will be forwarded to the <code>contentPane</code>. This is initially
 * false, but is set to true when the <code>JFrame</code> is constructed.
 *
 * @see #isRootPaneCheckingEnabled
 * @see #setRootPaneCheckingEnabled
 * @see javax.swing.RootPaneContainer
 */
protectedbooleanrootPaneCheckingEnabled = false;


/**
 * Constructs a new frame that is initially invisible.
 * <p>
 * This constructor sets the component's locale property to the value
 * returned by <code>JComponent.getDefaultLocale</code>.
 *
 * @throws HeadlessException if GraphicsEnvironment.isHeadless()
 * returns true.
 * @see java.awt.GraphicsEnvironment#isHeadless
 * @see Component#setSize
 * @see Component#setVisible
 * @see JComponent#getDefaultLocale
 */
publicJFrame() throwsHeadlessException {
super();
frameInit();
 }

/**
 * Creates a <code>Frame</code> in the specified
 * <code>GraphicsConfiguration</code> of
 * a screen device and a blank title.
 * <p>
 * This constructor sets the component's locale property to the value
 * returned by <code>JComponent.getDefaultLocale</code>.
 *
 * @param gc the <code>GraphicsConfiguration</code> that is used
 * to construct the new <code>Frame</code>;
 * if <code>gc</code> is <code>null</code>, the system
 * default <code>GraphicsConfiguration</code> is assumed
 * @throws IllegalArgumentException if <code>gc</code> is not from
 * a screen device. This exception is always thrown when
 * GraphicsEnvironment.isHeadless() returns true.
 * @see java.awt.GraphicsEnvironment#isHeadless
 * @see JComponent#getDefaultLocale
 * @since 1.3
 */
publicJFrame(GraphicsConfigurationgc) {
super(gc);
frameInit();
 }

/**
 * Creates a new, initially invisible <code>Frame</code> with the
 * specified title.
 * <p>
 * This constructor sets the component's locale property to the value
 * returned by <code>JComponent.getDefaultLocale</code>.
 *
 * @param title the title for the frame
 * @throws HeadlessException if GraphicsEnvironment.isHeadless()
 * returns true.
 * @see java.awt.GraphicsEnvironment#isHeadless
 * @see Component#setSize
 * @see Component#setVisible
 * @see JComponent#getDefaultLocale
 */
publicJFrame(Stringtitle) throwsHeadlessException {
super(title);
frameInit();
 }

/**
 * Creates a <code>JFrame</code> with the specified title and the
 * specified <code>GraphicsConfiguration</code> of a screen device.
 * <p>
 * This constructor sets the component's locale property to the value
 * returned by <code>JComponent.getDefaultLocale</code>.
 *
 * @param title the title to be displayed in the
 * frame's border. A <code>null</code> value is treated as
 * an empty string, "".
 * @param gc the <code>GraphicsConfiguration</code> that is used
 * to construct the new <code>JFrame</code> with;
 * if <code>gc</code> is <code>null</code>, the system
 * default <code>GraphicsConfiguration</code> is assumed
 * @throws IllegalArgumentException if <code>gc</code> is not from
 * a screen device. This exception is always thrown when
 * GraphicsEnvironment.isHeadless() returns true.
 * @see java.awt.GraphicsEnvironment#isHeadless
 * @see JComponent#getDefaultLocale
 * @since 1.3
 */
publicJFrame(Stringtitle, GraphicsConfigurationgc) {
super(title, gc);
frameInit();
 }

/** Called by the constructors to init the <code>JFrame</code> properly. */
protectedvoidframeInit() {
enableEvents(AWTEvent.KEY_EVENT_MASK | AWTEvent.WINDOW_EVENT_MASK);
setLocale( JComponent.getDefaultLocale() );
setRootPane(createRootPane());
setBackground(UIManager.getColor("control"));
setRootPaneCheckingEnabled(true);
if (JFrame.isDefaultLookAndFeelDecorated()) {
booleansupportsWindowDecorations =
UIManager.getLookAndFeel().getSupportsWindowDecorations();
if (supportsWindowDecorations) {
setUndecorated(true);
getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
 }
 }
sun.awt.SunToolkit.checkAndSetPolicy(this);
 }

/**
 * Called by the constructor methods to create the default
 * <code>rootPane</code>.
 *
 * @return a new {@code JRootPane}
 */
protectedJRootPanecreateRootPane() {
JRootPanerp = newJRootPane();
// NOTE: this uses setOpaque vs LookAndFeel.installProperty as there
// is NO reason for the RootPane not to be opaque. For painting to
// work the contentPane must be opaque, therefore the RootPane can
// also be opaque.
rp.setOpaque(true);
returnrp;
 }

/**
 * Processes window events occurring on this component.
 * Hides the window or disposes of it, as specified by the setting
 * of the <code>defaultCloseOperation</code> property.
 *
 * @param e the window event
 * @see #setDefaultCloseOperation
 * @see java.awt.Window#processWindowEvent
 */
protectedvoidprocessWindowEvent(finalWindowEvente) {
super.processWindowEvent(e);

if (e.getID() == WindowEvent.WINDOW_CLOSING) {
switch (defaultCloseOperation) {
caseHIDE_ON_CLOSE:
setVisible(false);
break;
caseDISPOSE_ON_CLOSE:
dispose();
break;
caseEXIT_ON_CLOSE:
// This needs to match the checkExit call in
// setDefaultCloseOperation
System.exit(0);
break;
caseDO_NOTHING_ON_CLOSE:
default:
 }
 }
 }

/**
 * Sets the operation that will happen by default when
 * the user initiates a "close" on this frame.
 * You must specify one of the following choices:
 * <br><br>
 * <ul>
 * <li><code>DO_NOTHING_ON_CLOSE</code>
 * (defined in <code>WindowConstants</code>):
 * Don't do anything; require the
 * program to handle the operation in the <code>windowClosing</code>
 * method of a registered <code>WindowListener</code> object.
 *
 * <li><code>HIDE_ON_CLOSE</code>
 * (defined in <code>WindowConstants</code>):
 * Automatically hide the frame after
 * invoking any registered <code>WindowListener</code>
 * objects.
 *
 * <li><code>DISPOSE_ON_CLOSE</code>
 * (defined in <code>WindowConstants</code>):
 * Automatically hide and dispose the
 * frame after invoking any registered <code>WindowListener</code>
 * objects.
 *
 * <li><code>EXIT_ON_CLOSE</code>
 * (defined in <code>WindowConstants</code>):
 * Exit the application using the <code>System</code>
 * <code>exit</code> method. Use this only in applications.
 * </ul>
 * <p>
 * The value is set to <code>HIDE_ON_CLOSE</code> by default. Changes
 * to the value of this property cause the firing of a property
 * change event, with property name "defaultCloseOperation".
 * <p>
 * <b>Note</b>: When the last displayable window within the
 * Java virtual machine (VM) is disposed of, the VM may
 * terminate. See <a href="../../java/awt/doc-files/AWTThreadIssues.html">
 * AWT Threading Issues</a> for more information.
 *
 * @param operation the operation which should be performed when the
 * user closes the frame
 * @throws IllegalArgumentException if defaultCloseOperation value
 * isn't one of the above valid values
 * @see #addWindowListener
 * @see #getDefaultCloseOperation
 * @see WindowConstants
 * @see java.lang.Runtime#exit(int)
 */
@BeanProperty(preferred = true, enumerationValues = {
"WindowConstants.DO_NOTHING_ON_CLOSE",
"WindowConstants.HIDE_ON_CLOSE",
"WindowConstants.DISPOSE_ON_CLOSE",
"WindowConstants.EXIT_ON_CLOSE"}, description
 = "The frame's default close operation.")
publicvoidsetDefaultCloseOperation(intoperation) {
if (operation != DO_NOTHING_ON_CLOSE &&
operation != HIDE_ON_CLOSE &&
operation != DISPOSE_ON_CLOSE &&
operation != EXIT_ON_CLOSE) {
thrownewIllegalArgumentException("defaultCloseOperation must be"
 + " one of: DO_NOTHING_ON_CLOSE, HIDE_ON_CLOSE,"
 + " DISPOSE_ON_CLOSE, or EXIT_ON_CLOSE");
 }

if (this.defaultCloseOperation != operation) {
intoldValue = this.defaultCloseOperation;
this.defaultCloseOperation = operation;
firePropertyChange("defaultCloseOperation", oldValue, operation);
 }
 }


/**
 * Returns the operation that occurs when the user
 * initiates a "close" on this frame.
 *
 * @return an integer indicating the window-close operation
 * @see #setDefaultCloseOperation
 */
publicintgetDefaultCloseOperation() {
returndefaultCloseOperation;
 }

/**
 * Sets the {@code transferHandler} property, which is a mechanism to
 * support transfer of data into this component. Use {@code null}
 * if the component does not support data transfer operations.
 * <p>
 * If the system property {@code suppressSwingDropSupport} is {@code false}
 * (the default) and the current drop target on this component is either
 * {@code null} or not a user-set drop target, this method will change the
 * drop target as follows: If {@code newHandler} is {@code null} it will
 * clear the drop target. If not {@code null} it will install a new
 * {@code DropTarget}.
 * <p>
 * Note: When used with {@code JFrame}, {@code TransferHandler} only
 * provides data import capability, as the data export related methods
 * are currently typed to {@code JComponent}.
 * <p>
 * Please see
 * <a href="https://docs.oracle.com/javase/tutorial/uiswing/dnd/index.html">
 * How to Use Drag and Drop and Data Transfer</a>, a section in
 * <em>The Java Tutorial</em>, for more information.
 *
 * @param newHandler the new {@code TransferHandler}
 *
 * @see TransferHandler
 * @see #getTransferHandler
 * @see java.awt.Component#setDropTarget
 * @since 1.6
 */
@BeanProperty(hidden = true, description
 = "Mechanism for transfer of data into the component")
publicvoidsetTransferHandler(TransferHandlernewHandler) {
TransferHandleroldHandler = transferHandler;
transferHandler = newHandler;
SwingUtilities.installSwingDropTargetAsNecessary(this, transferHandler);
firePropertyChange("transferHandler", oldHandler, newHandler);
 }

/**
 * Gets the <code>transferHandler</code> property.
 *
 * @return the value of the <code>transferHandler</code> property
 *
 * @see TransferHandler
 * @see #setTransferHandler
 * @since 1.6
 */
publicTransferHandlergetTransferHandler() {
returntransferHandler;
 }

/**
 * Just calls <code>paint(g)</code>. This method was overridden to
 * prevent an unnecessary call to clear the background.
 *
 * @param g the Graphics context in which to paint
 */
publicvoidupdate(Graphicsg) {
paint(g);
 }

/**
 * Sets the menubar for this frame.
 * @param menubar the menubar being placed in the frame
 *
 * @see #getJMenuBar
 */
@BeanProperty(bound = false, hidden = true, description
 = "The menubar for accessing pulldown menus from this frame.")
publicvoidsetJMenuBar(finalJMenuBarmenubar) {
getRootPane().setJMenuBar(menubar);
 }

/**
 * Returns the menubar set on this frame.
 * @return the menubar for this frame
 *
 * @see #setJMenuBar
 */
publicJMenuBargetJMenuBar() {
returngetRootPane().getJMenuBar();
 }

/**
 * Returns whether calls to <code>add</code> and
 * <code>setLayout</code> are forwarded to the <code>contentPane</code>.
 *
 * @return true if <code>add</code> and <code>setLayout</code>
 * are forwarded; false otherwise
 *
 * @see #addImpl
 * @see #setLayout
 * @see #setRootPaneCheckingEnabled
 * @see javax.swing.RootPaneContainer
 */
protectedbooleanisRootPaneCheckingEnabled() {
returnrootPaneCheckingEnabled;
 }


/**
 * Sets whether calls to <code>add</code> and
 * <code>setLayout</code> are forwarded to the <code>contentPane</code>.
 *
 * @param enabled true if <code>add</code> and <code>setLayout</code>
 * are forwarded, false if they should operate directly on the
 * <code>JFrame</code>.
 *
 * @see #addImpl
 * @see #setLayout
 * @see #isRootPaneCheckingEnabled
 * @see javax.swing.RootPaneContainer
 */
@BeanProperty(hidden = true, description
 = "Whether the add and setLayout methods are forwarded")
protectedvoidsetRootPaneCheckingEnabled(booleanenabled) {
rootPaneCheckingEnabled = enabled;
 }


/**
 * Adds the specified child <code>Component</code>.
 * This method is overridden to conditionally forward calls to the
 * <code>contentPane</code>.
 * By default, children are added to the <code>contentPane</code> instead
 * of the frame, refer to {@link javax.swing.RootPaneContainer} for
 * details.
 *
 * @param comp the component to be enhanced
 * @param constraints the constraints to be respected
 * @param index the index
 * @throws IllegalArgumentException if <code>index</code> is invalid
 * @throws IllegalArgumentException if adding the container's parent
 * to itself
 * @throws IllegalArgumentException if adding a window to a container
 *
 * @see #setRootPaneCheckingEnabled
 * @see javax.swing.RootPaneContainer
 */
protectedvoidaddImpl(Componentcomp, Objectconstraints, intindex)
 {
if(isRootPaneCheckingEnabled()) {
getContentPane().add(comp, constraints, index);
 }
else {
super.addImpl(comp, constraints, index);
 }
 }

/**
 * Removes the specified component from the container. If
 * <code>comp</code> is not the <code>rootPane</code>, this will forward
 * the call to the <code>contentPane</code>. This will do nothing if
 * <code>comp</code> is not a child of the <code>JFrame</code> or
 * <code>contentPane</code>.
 *
 * @param comp the component to be removed
 * @throws NullPointerException if <code>comp</code> is null
 * @see #add
 * @see javax.swing.RootPaneContainer
 */
publicvoidremove(Componentcomp) {
if (comp == rootPane) {
super.remove(comp);
 } else {
getContentPane().remove(comp);
 }
 }


/**
 * Sets the <code>LayoutManager</code>.
 * Overridden to conditionally forward the call to the
 * <code>contentPane</code>.
 * Refer to {@link javax.swing.RootPaneContainer} for
 * more information.
 *
 * @param manager the <code>LayoutManager</code>
 * @see #setRootPaneCheckingEnabled
 * @see javax.swing.RootPaneContainer
 */
publicvoidsetLayout(LayoutManagermanager) {
if(isRootPaneCheckingEnabled()) {
getContentPane().setLayout(manager);
 }
else {
super.setLayout(manager);
 }
 }


/**
 * Returns the <code>rootPane</code> object for this frame.
 * @return the <code>rootPane</code> property
 *
 * @see #setRootPane
 * @see RootPaneContainer#getRootPane
 */
@BeanProperty(bound = false, hidden = true, description
 = "the RootPane object for this frame.")
publicJRootPanegetRootPane() {
returnrootPane;
 }


/**
 * Sets the <code>rootPane</code> property.
 * This method is called by the constructor.
 * @param root the <code>rootPane</code> object for this frame
 *
 * @see #getRootPane
 */
protectedvoidsetRootPane(JRootPaneroot)
 {
if(rootPane != null) {
remove(rootPane);
 }
rootPane = root;
if(rootPane != null) {
booleancheckingEnabled = isRootPaneCheckingEnabled();
try {
setRootPaneCheckingEnabled(false);
add(rootPane, BorderLayout.CENTER);
 }
finally {
setRootPaneCheckingEnabled(checkingEnabled);
 }
 }
 }

/**
 * {@inheritDoc}
 */
publicvoidsetIconImage(Imageimage) {
super.setIconImage(image);
 }

/**
 * Returns the <code>contentPane</code> object for this frame.
 * @return the <code>contentPane</code> property
 *
 * @see #setContentPane
 * @see RootPaneContainer#getContentPane
 */
publicContainergetContentPane() {
returngetRootPane().getContentPane();
 }

/**
 * Sets the <code>contentPane</code> property.
 * This method is called by the constructor.
 * <p>
 * Swing's painting architecture requires an opaque <code>JComponent</code>
 * in the containment hierarchy. This is typically provided by the
 * content pane. If you replace the content pane it is recommended you
 * replace it with an opaque <code>JComponent</code>.
 *
 * @param contentPane the <code>contentPane</code> object for this frame
 *
 * @throws java.awt.IllegalComponentStateException (a runtime
 * exception) if the content pane parameter is <code>null</code>
 * @see #getContentPane
 * @see RootPaneContainer#setContentPane
 * @see JRootPane
 */
@BeanProperty(bound = false, hidden = true, description
 = "The client area of the frame where child components are normally inserted.")
publicvoidsetContentPane(ContainercontentPane) {
getRootPane().setContentPane(contentPane);
 }

/**
 * Returns the <code>layeredPane</code> object for this frame.
 * @return the <code>layeredPane</code> property
 *
 * @see #setLayeredPane
 * @see RootPaneContainer#getLayeredPane
 */
publicJLayeredPanegetLayeredPane() {
returngetRootPane().getLayeredPane();
 }

/**
 * Sets the <code>layeredPane</code> property.
 * This method is called by the constructor.
 * @param layeredPane the <code>layeredPane</code> object for this frame
 *
 * @throws java.awt.IllegalComponentStateException (a runtime
 * exception) if the layered pane parameter is <code>null</code>
 * @see #getLayeredPane
 * @see RootPaneContainer#setLayeredPane
 */
@BeanProperty(bound = false, hidden = true, description
 = "The pane that holds the various frame layers.")
publicvoidsetLayeredPane(JLayeredPanelayeredPane) {
getRootPane().setLayeredPane(layeredPane);
 }

/**
 * Returns the <code>glassPane</code> object for this frame.
 * @return the <code>glassPane</code> property
 *
 * @see #setGlassPane
 * @see RootPaneContainer#getGlassPane
 */
publicComponentgetGlassPane() {
returngetRootPane().getGlassPane();
 }

/**
 * Sets the <code>glassPane</code> property.
 * This method is called by the constructor.
 * @param glassPane the <code>glassPane</code> object for this frame
 *
 * @see #getGlassPane
 * @see RootPaneContainer#setGlassPane
 */
@BeanProperty(bound = false, hidden = true, description
 = "A transparent pane used for menu rendering.")
publicvoidsetGlassPane(ComponentglassPane) {
getRootPane().setGlassPane(glassPane);
 }

/**
 * {@inheritDoc}
 *
 * @since 1.6
 */
@BeanProperty(bound = false)
publicGraphicsgetGraphics() {
JComponent.getGraphicsInvoked(this);
returnsuper.getGraphics();
 }

/**
 * Repaints the specified rectangle of this component within
 * <code>time</code> milliseconds. Refer to <code>RepaintManager</code>
 * for details on how the repaint is handled.
 *
 * @param time maximum time in milliseconds before update
 * @param x the <i>x</i> coordinate
 * @param y the <i>y</i> coordinate
 * @param width the width
 * @param height the height
 * @see RepaintManager
 * @since 1.6
 */
publicvoidrepaint(longtime, intx, inty, intwidth, intheight) {
if (RepaintManager.HANDLE_TOP_LEVEL_PAINT) {
RepaintManager.currentManager(this).addDirtyRegion(
this, x, y, width, height);
 }
else {
super.repaint(time, x, y, width, height);
 }
 }

/**
 * Provides a hint as to whether or not newly created <code>JFrame</code>s
 * should have their Window decorations (such as borders, widgets to
 * close the window, title...) provided by the current look
 * and feel. If <code>defaultLookAndFeelDecorated</code> is true,
 * the current <code>LookAndFeel</code> supports providing window
 * decorations, and the current window manager supports undecorated
 * windows, then newly created <code>JFrame</code>s will have their
 * Window decorations provided by the current <code>LookAndFeel</code>.
 * Otherwise, newly created <code>JFrame</code>s will have their
 * Window decorations provided by the current window manager.
 * <p>
 * You can get the same effect on a single JFrame by doing the following:
 * <pre>
 * JFrame frame = new JFrame();
 * frame.setUndecorated(true);
 * frame.getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
 * </pre>
 *
 * @param defaultLookAndFeelDecorated A hint as to whether or not current
 * look and feel should provide window decorations
 * @see javax.swing.LookAndFeel#getSupportsWindowDecorations
 * @since 1.4
 */
publicstaticvoidsetDefaultLookAndFeelDecorated(booleandefaultLookAndFeelDecorated) {
if (defaultLookAndFeelDecorated) {
SwingUtilities.appContextPut(defaultLookAndFeelDecoratedKey, Boolean.TRUE);
 } else {
SwingUtilities.appContextPut(defaultLookAndFeelDecoratedKey, Boolean.FALSE);
 }
 }


/**
 * Returns true if newly created <code>JFrame</code>s should have their
 * Window decorations provided by the current look and feel. This is only
 * a hint, as certain look and feels may not support this feature.
 *
 * @return true if look and feel should provide Window decorations.
 * @since 1.4
 */
publicstaticbooleanisDefaultLookAndFeelDecorated() {
BooleandefaultLookAndFeelDecorated =
 (Boolean) SwingUtilities.appContextGet(defaultLookAndFeelDecoratedKey);
if (defaultLookAndFeelDecorated == null) {
defaultLookAndFeelDecorated = Boolean.FALSE;
 }
returndefaultLookAndFeelDecorated.booleanValue();
 }

/**
 * Returns a string representation of this <code>JFrame</code>.
 * This method
 * is intended to be used only for debugging purposes, and the
 * content and format of the returned string may vary between
 * implementations. The returned string may be empty but may not
 * be <code>null</code>.
 *
 * @return a string representation of this <code>JFrame</code>
 */
protectedStringparamString() {
StringdefaultCloseOperationString;
if (defaultCloseOperation == HIDE_ON_CLOSE) {
defaultCloseOperationString = "HIDE_ON_CLOSE";
 } elseif (defaultCloseOperation == DISPOSE_ON_CLOSE) {
defaultCloseOperationString = "DISPOSE_ON_CLOSE";
 } elseif (defaultCloseOperation == DO_NOTHING_ON_CLOSE) {
defaultCloseOperationString = "DO_NOTHING_ON_CLOSE";
 } elseif (defaultCloseOperation == EXIT_ON_CLOSE) {
defaultCloseOperationString = "EXIT_ON_CLOSE";
 } elsedefaultCloseOperationString = "";
StringrootPaneString = (rootPane != null ?
rootPane.toString() : "");
StringrootPaneCheckingEnabledString = (rootPaneCheckingEnabled ?
"true" : "false");

returnsuper.paramString() +
",defaultCloseOperation=" + defaultCloseOperationString +
",rootPane=" + rootPaneString +
",rootPaneCheckingEnabled=" + rootPaneCheckingEnabledString;
 }



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

/**
 * The accessible context property.
 */
protectedAccessibleContextaccessibleContext = null;

/**
 * Gets the AccessibleContext associated with this JFrame.
 * For JFrames, the AccessibleContext takes the form of an
 * AccessibleJFrame.
 * A new AccessibleJFrame instance is created if necessary.
 *
 * @return an AccessibleJFrame that serves as the
 * AccessibleContext of this JFrame
 */
publicAccessibleContextgetAccessibleContext() {
if (accessibleContext == null) {
accessibleContext = newAccessibleJFrame();
 }
returnaccessibleContext;
 }

/**
 * This class implements accessibility support for the
 * <code>JFrame</code> class. It provides an implementation of the
 * Java Accessibility API appropriate to frame user-interface
 * elements.
 */
protectedclassAccessibleJFrameextendsAccessibleAWTFrame {

/**
 * Constructs an {@code AccessibleJFrame}.
 */
protectedAccessibleJFrame() {}

// AccessibleContext methods
/**
 * Get the accessible name of this object.
 *
 * @return the localized name of the object -- can be null if this
 * object does not have a name
 */
publicStringgetAccessibleName() {
if (accessibleName != null) {
returnaccessibleName;
 } else {
if (getTitle() == null) {
returnsuper.getAccessibleName();
 } else {
returngetTitle();
 }
 }
 }

/**
 * Get the state of this object.
 *
 * @return an instance of AccessibleStateSet containing the current
 * state set of the object
 * @see AccessibleState
 */
publicAccessibleStateSetgetAccessibleStateSet() {
AccessibleStateSetstates = super.getAccessibleStateSet();

if (isResizable()) {
states.add(AccessibleState.RESIZABLE);
 }
if (getFocusOwner() != null) {
states.add(AccessibleState.ACTIVE);
 }
// FIXME: [[[WDW - should also return ICONIFIED and ICONIFIABLE
// if we can ever figure these out]]]
returnstates;
 }
 } // inner class AccessibleJFrame
}