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:

Accessible, ImageObserver, MenuContainer, RootPaneContainer, Serializable

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 it's only child. The contentPane should be the parent of any children of the JApplet. This is different than java.applet.Applet, e.g. to add a child to an an java.applet.Applet you'd write:

       applet.add(child);
 

However using JApplet you need to add the child to the JApplet's contentPane instead:

       applet.getContentPane().add(child);
 

The same is true for setting LayoutManagers, removing components, listing children, etc. All these methods should normally be sent to the contentPane() instead of the JApplet itself. 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.

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

For the keyboard keys used by this component in the standard Look and Feel (L&F) renditions, see the JApplet key assignments.

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.

Nested Class Summary
protected  class	JApplet.AccessibleJApplet     This class implements accessibility support for the JApplet class.

 

Nested classes inherited from class java.applet.Applet

 

Nested classes inherited from class java.awt.Panel

 

Nested classes inherited from class java.awt.Container

 

Nested classes inherited from class java.awt.Component

Component.BltBufferStrategy, Component.FlipBufferStrategy

 

Field Summary
protected  AccessibleContext	accessibleContext
protected  JRootPane	rootPane
protected  boolean	rootPaneCheckingEnabled

 

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)     By default, children may not be added directly to a this component, they must be added to its contentPane instead.
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()
protected  String	paramString()     Returns a string representation of this JApplet.
void	remove(Component comp)     Removes the specified component from this 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)     By default the layout of this component may not be set, the layout of its contentPane should be set instead.