javax.swing
Class JApplet

java.lang.Object   
  java.awt.Component   
      java.awt.Container   
          java.awt.Panel   
              java.applet.Applet   
                  javax.swing.JApplet

All Implemented Interfaces:

ImageObserver , MenuContainer , Serializable , Accessible , RootPaneContainer

public class JApplet
extends Applet   
implements Accessible   , RootPaneContainer   

An extended version of java.applet.Applet that adds support for the JFC/Swing component architecture. You can find task-oriented documentation about using JApplet in The Java Tutorial, in the section How to Make Applets.

The JApplet class is slightly incompatible with java.applet.Applet. JApplet contains a JRootPane as its only child. The contentPane should be the parent of any children of the JApplet. As a convenience add and its variants, remove and setLayout have been overridden to forward to the contentPane as necessary. This means you can write:

       applet.add(child);
 

And the child will be added to the contentPane. The contentPane will always be non-null. Attempting to set it to null will cause the JApplet to throw an exception. The default contentPane will have a BorderLayout manager set on it. Refer to RootPaneContainer for details on adding, removing and setting the LayoutManager of a JApplet.

Please see the JRootPane documentation for a complete description of the contentPane, glassPane, and layeredPane properties.

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

See Also:

RootPaneContainer , Serialized Form

Nested Class Summary

protected class

JApplet.AccessibleJApplet This class implements accessibility support for the JApplet class.

Nested classes/interfaces inherited from class java.applet.Applet

Applet.AccessibleApplet

Nested classes/interfaces inherited from class java.awt.Panel

Panel.AccessibleAWTPanel

Nested classes/interfaces inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

Component.AccessibleAWTComponent , Component.BltBufferStrategy , Component.FlipBufferStrategy

Field Summary

protected AccessibleContext	accessibleContext
protected JRootPane	rootPane
protected boolean	rootPaneCheckingEnabled If true then calls to add and setLayout will be forwarded to the contentPane.

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT , CENTER_ALIGNMENT , LEFT_ALIGNMENT , RIGHT_ALIGNMENT , TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT , ALLBITS , ERROR , FRAMEBITS , HEIGHT , PROPERTIES , SOMEBITS , WIDTH

Constructor Summary

JApplet ()
Creates a swing applet instance.

Method Summary

protected void	addImpl (Component comp, Object constraints, int index) Adds the specified child Component.
protected JRootPane	createRootPane () Called by the constructor methods to create the default rootPane.
AccessibleContext	getAccessibleContext () Gets the AccessibleContext associated with this JApplet.
Container	getContentPane () Returns the contentPane object for this applet.
Component	getGlassPane () Returns the glassPane object for this applet.
JMenuBar	getJMenuBar () Returns the menubar set on this applet.
JLayeredPane	getLayeredPane () Returns the layeredPane object for this applet.
JRootPane	getRootPane () Returns the rootPane object for this applet.
protected boolean	isRootPaneCheckingEnabled () Returns whether calls to add and setLayout are forwarded to the contentPane.
protected String	paramString () Returns a string representation of this JApplet.
void	remove (Component comp) Removes the specified component from the container.
void	setContentPane (Container contentPane) Sets the contentPane property.
void	setGlassPane (Component glassPane) Sets the glassPane property.
void	setJMenuBar (JMenuBar menuBar) Sets the menubar for this applet.
void	setLayeredPane (JLayeredPane layeredPane) Sets the layeredPane property.
void	setLayout (LayoutManager manager) Sets the LayoutManager.
protected void	setRootPane (JRootPane root) Sets the rootPane property.
protected void	setRootPaneCheckingEnabled (boolean enabled) Sets whether calls to add and setLayout are forwarded to the contentPane.
void	update (Graphics g) Just calls paint(g).

Methods inherited from class java.applet.Applet

destroy , getAppletContext , getAppletInfo , getAudioClip , getAudioClip , getCodeBase , getDocumentBase , getImage , getImage , getLocale , getParameter , getParameterInfo , init , isActive , newAudioClip , play , play , resize , resize , setStub , showStatus , start , stop

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add , add , add , add , add , addContainerListener , addPropertyChangeListener , addPropertyChangeListener , applyComponentOrientation , areFocusTraversalKeysSet , countComponents , deliverEvent , doLayout , findComponentAt , findComponentAt , getAlignmentX , getAlignmentY , getComponent , getComponentAt , getComponentAt , getComponentCount , getComponents , getComponentZOrder , getContainerListeners , getFocusTraversalKeys , getFocusTraversalPolicy , getInsets , getLayout , getListeners , getMaximumSize , getMinimumSize , getMousePosition , getPreferredSize , insets , invalidate , isAncestorOf , isFocusCycleRoot , isFocusCycleRoot , isFocusTraversalPolicyProvider , isFocusTraversalPolicySet , layout , list , list , locate , minimumSize , paint , paintComponents , preferredSize , print , printComponents , processContainerEvent , processEvent , remove , removeAll , removeContainerListener , removeNotify , setComponentZOrder , setFocusCycleRoot , setFocusTraversalKeys