javax.swing.JApplet
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, the add, remove, and setLayout methods of this class are overridden, so that they delegate calls to the corresponding methods of the ContentPane. For example, you can add a child component to an applet as follows:
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: 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 JavaBeans™ has been added to the java.beans package. Please see XMLEncoder.
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, the add, remove, and setLayout
methods of this class are overridden, so that they delegate calls
to the corresponding methods of the ContentPane.
For example, you can add a child component to an applet as follows:
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: 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 JavaBeans™
has been added to the java.beans package.
Please see XMLEncoder.->j-appletclj
(->j-applet)Constructor.
Creates a swing applet instance.
This constructor sets the component's locale property to the value returned by JComponent.getDefaultLocale.
throws: java.awt.HeadlessException - if GraphicsEnvironment.isHeadless() returns true.
Constructor. Creates a swing applet instance. This constructor sets the component's locale property to the value returned by JComponent.getDefaultLocale. throws: java.awt.HeadlessException - if GraphicsEnvironment.isHeadless() returns true.
get-accessible-contextclj
(get-accessible-context this)Gets the AccessibleContext associated with this JApplet. For JApplets, the AccessibleContext takes the form of an AccessibleJApplet. A new AccessibleJApplet instance is created if necessary.
returns: an AccessibleJApplet that serves as the
AccessibleContext of this JApplet - javax.accessibility.AccessibleContext
Gets the AccessibleContext associated with this JApplet.
For JApplets, the AccessibleContext takes the form of an
AccessibleJApplet.
A new AccessibleJApplet instance is created if necessary.
returns: an AccessibleJApplet that serves as the
AccessibleContext of this JApplet - `javax.accessibility.AccessibleContext`get-content-paneclj
(get-content-pane this)Returns the contentPane object for this applet.
returns: the value of the contentPane property. - java.awt.Container
Returns the contentPane object for this applet. returns: the value of the contentPane property. - `java.awt.Container`
get-glass-paneclj
(get-glass-pane this)Returns the glassPane object for this applet.
returns: the value of the glassPane property. - java.awt.Component
Returns the glassPane object for this applet. returns: the value of the glassPane property. - `java.awt.Component`
get-graphicsclj
(get-graphics this)Creates a graphics context for this component. This method will return null if this component is currently not displayable.
returns: a graphics context for this component, or null
if it has none - java.awt.Graphics
Creates a graphics context for this component. This method will
return null if this component is currently not
displayable.
returns: a graphics context for this component, or null
if it has none - `java.awt.Graphics`get-j-menu-barclj
(get-j-menu-bar this)Returns the menubar set on this applet.
returns: javax.swing.JMenuBar
Returns the menubar set on this applet. returns: `javax.swing.JMenuBar`
get-layered-paneclj
(get-layered-pane this)Returns the layeredPane object for this applet.
returns: the value of the layeredPane property. - javax.swing.JLayeredPane
throws: java.awt.IllegalComponentStateException - (a runtime exception) if the layered pane parameter is null
Returns the layeredPane object for this applet. returns: the value of the layeredPane property. - `javax.swing.JLayeredPane` throws: java.awt.IllegalComponentStateException - (a runtime exception) if the layered pane parameter is null
get-root-paneclj
(get-root-pane this)Returns the rootPane object for this applet.
returns: this components single JRootPane child. - javax.swing.JRootPane
Returns the rootPane object for this applet. returns: this components single JRootPane child. - `javax.swing.JRootPane`
get-transfer-handlerclj
(get-transfer-handler this)Gets the transferHandler property.
returns: the value of the transferHandler property - javax.swing.TransferHandler
Gets the transferHandler property. returns: the value of the transferHandler property - `javax.swing.TransferHandler`
removeclj
(remove this comp)Removes the specified component from the container. If comp is not the rootPane, this will forward the call to the contentPane. This will do nothing if comp is not a child of the JFrame or contentPane.
comp - the component to be removed - java.awt.Component
throws: java.lang.NullPointerException - if comp is null
Removes the specified component from the container. If comp is not the rootPane, this will forward the call to the contentPane. This will do nothing if comp is not a child of the JFrame or contentPane. comp - the component to be removed - `java.awt.Component` throws: java.lang.NullPointerException - if comp is null
repaintclj
(repaint this time x y width height)Repaints the specified rectangle of this component within time milliseconds. Refer to RepaintManager for details on how the repaint is handled.
time - maximum time in milliseconds before update - long
x - the x coordinate - int
y - the y coordinate - int
width - the width - int
height - the height - int
Repaints the specified rectangle of this component within time milliseconds. Refer to RepaintManager for details on how the repaint is handled. time - maximum time in milliseconds before update - `long` x - the x coordinate - `int` y - the y coordinate - `int` width - the width - `int` height - the height - `int`
set-content-paneclj
(set-content-pane this content-pane)Sets the contentPane property. This method is called by the constructor.
content-pane - the contentPane object for this applet - java.awt.Container
throws: java.awt.IllegalComponentStateException - (a runtime exception) if the content pane parameter is null
Sets the contentPane property. This method is called by the constructor. content-pane - the contentPane object for this applet - `java.awt.Container` throws: java.awt.IllegalComponentStateException - (a runtime exception) if the content pane parameter is null
set-glass-paneclj
(set-glass-pane this glass-pane)Sets the glassPane property. This method is called by the constructor.
glass-pane - the glassPane object for this applet - java.awt.Component
Sets the glassPane property. This method is called by the constructor. glass-pane - the glassPane object for this applet - `java.awt.Component`
set-j-menu-barclj
(set-j-menu-bar this menu-bar)Sets the menubar for this applet.
menu-bar - the menubar being placed in the applet - javax.swing.JMenuBar
Sets the menubar for this applet. menu-bar - the menubar being placed in the applet - `javax.swing.JMenuBar`
set-layered-paneclj
(set-layered-pane this layered-pane)Sets the layeredPane property. This method is called by the constructor.
layered-pane - the layeredPane object for this applet - javax.swing.JLayeredPane
Sets the layeredPane property. This method is called by the constructor. layered-pane - the layeredPane object for this applet - `javax.swing.JLayeredPane`
set-layoutclj
(set-layout this manager)Sets the LayoutManager. Overridden to conditionally forward the call to the contentPane. Refer to RootPaneContainer for more information.
manager - the LayoutManager - java.awt.LayoutManager
Sets the LayoutManager. Overridden to conditionally forward the call to the contentPane. Refer to RootPaneContainer for more information. manager - the LayoutManager - `java.awt.LayoutManager`
set-transfer-handlerclj
(set-transfer-handler this new-handler)Sets the transferHandler property, which is a mechanism to support transfer of data into this component. Use null if the component does not support data transfer operations.
If the system property suppressSwingDropSupport is false (the default) and the current drop target on this component is either null or not a user-set drop target, this method will change the drop target as follows: If newHandler is null it will clear the drop target. If not null it will install a new DropTarget.
Note: When used with JApplet, TransferHandler only provides data import capability, as the data export related methods are currently typed to JComponent.
Please see
How to Use Drag and Drop and Data Transfer, a section in The Java Tutorial, for more information.
new-handler - the new TransferHandler - javax.swing.TransferHandler
Sets the transferHandler property, which is a mechanism to support transfer of data into this component. Use null if the component does not support data transfer operations. If the system property suppressSwingDropSupport is false (the default) and the current drop target on this component is either null or not a user-set drop target, this method will change the drop target as follows: If newHandler is null it will clear the drop target. If not null it will install a new DropTarget. Note: When used with JApplet, TransferHandler only provides data import capability, as the data export related methods are currently typed to JComponent. Please see How to Use Drag and Drop and Data Transfer, a section in The Java Tutorial, for more information. new-handler - the new TransferHandler - `javax.swing.TransferHandler`
updateclj
(update this g)Just calls paint(g). This method was overridden to prevent an unnecessary call to clear the background.
g - the specified Graphics window - java.awt.Graphics
Just calls paint(g). This method was overridden to prevent an unnecessary call to clear the background. g - the specified Graphics window - `java.awt.Graphics`
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