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Class com.sun.java.swing.JWindow 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Window
                           |
                           +----com.sun.java.swing.JWindow
public class JWindow
extends Window
implements Accessible, RootPaneContainer
A JWindow is a container that can be displayed anywhere on the user's desktop. It does not have the title bar, window-management buttons, or other trimmings associated with a JFrame, but it is still a "first-class citizen" of the user's desktop, and can exist anywhere on it.

The JWindow component contains a JRootPane as it's only child. The contentPane() should be the parent of any children of the JWindow. From the older java.awt.Window object you would normally do something like this:

       window.add(child);
However, using JWindow you would code:
       window.getContentPane().add(child);
The same is true of setting LayoutManagers, removing components, listing children, etc. All these methods should normally be sent to the contentPane() instead of the JWindow itself. The contentPane() will always be non-null. Attempting to set it to null will cause the JWindow 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() components.

For the keyboard keys used by this component in the standard Look and Feel (L&F) renditions, see the JWindow 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 Swing1.0 applications. It will not be possible to load serialized Swing1.0 objects with future releases of Swing. The JDK1.2 release of Swing will be the compatibility baseline for the serialized form of Swing objects.

See Also:
JRootPane

Variable Index

o accessibleContext
The accessible context property
o rootPane
The JRootPane instance that manages the contentPane and optional menuBar for this frame, as well as the glassPane.
o rootPaneCheckingEnabled
If true then calls to add and setLayout cause an exception to be thrown.

Constructor Index

o JWindow()
Creates a window with no specified owner.
o JWindow(Frame)
Creates a window with the specified owner frame.

Method Index

o addImpl(Component, Object, int)
By default, children may not be added directly to a this component, they must be added to its contentPane instead.
o createRootPane()
Called by the constructor methods to create the default rootPane.
o getAccessibleContext()
Get the AccessibleContext associated with this JWindow
o getContentPane()
Returns the contentPane object for this window.
o getGlassPane()
Returns the glassPane object for this window.
o getLayeredPane()
Returns the layeredPane object for this window.
o getRootPane()
Returns the rootPane object for this window.
o isRootPaneCheckingEnabled()
Returns whether calls to add and setLayout cause an exception to be thrown.
o setContentPane(Container)
Sets the contentPane property.
o setGlassPane(Component)
Sets the glassPane property.
o setLayeredPane(JLayeredPane)
Sets the layeredPane property.
o setLayout(LayoutManager)
By default the layout of this component may not be set, the layout of its contentPane should be set instead.
o setRootPane(JRootPane)
Sets the rootPane property.
o setRootPaneCheckingEnabled(boolean)
Determines whether calls to add and setLayout cause an exception to be thrown.
o windowInit()
Called by the constructors to init the JWindow properly.

Variables

o rootPane 
 protected JRootPane rootPane
The JRootPane instance that manages the contentPane and optional menuBar for this frame, as well as the glassPane.

See Also:
getRootPane, setRootPane
o rootPaneCheckingEnabled 
 protected boolean rootPaneCheckingEnabled
If true then calls to add and setLayout cause an exception to be thrown.

See Also:
isRootPaneCheckingEnabled, setRootPaneCheckingEnabled
o accessibleContext 
 protected AccessibleContext accessibleContext
The accessible context property

Constructors

o JWindow 
 public JWindow()
Creates a window with no specified owner.

o JWindow 
 public JWindow(Frame owner)
Creates a window with the specified owner frame.

Parameters:
owner - the frame from which the window is displayed

Methods

o windowInit 
 protected void windowInit()
Called by the constructors to init the JWindow properly.

o createRootPane 
 protected JRootPane createRootPane()
Called by the constructor methods to create the default rootPane.

o isRootPaneCheckingEnabled 
 protected boolean isRootPaneCheckingEnabled()
Returns whether calls to add and setLayout cause an exception to be thrown.

Returns:
true if add and setLayout are checked
See Also:
addImpl, setLayout, setRootPaneCheckingEnabled
o setRootPaneCheckingEnabled 
 protected void setRootPaneCheckingEnabled(boolean enabled)
Determines whether calls to add and setLayout cause an exception to be thrown.

Parameters:
enabled - a boolean value, true if checking is to be enabled, which cause the exceptions to be thrown
See Also:
addImpl, setLayout, isRootPaneCheckingEnabled
o addImpl 
 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. For example: 
 thisComponent.getContentPane().add(child)
An attempt to add to directly to this component will cause an runtime exception to be thrown. Subclasses can disable this behavior.

Throws: Error
if called with rootPaneChecking true
Overrides:
addImpl in class Container
See Also:
setRootPaneCheckingEnabled
o setLayout 
 public void setLayout(LayoutManager manager)
By default the layout of this component may not be set, the layout of its contentPane should be set instead. For example: 
 thisComponent.getContentPane().setLayout(new BorderLayout())
An attempt to set the layout of this component will cause an runtime exception to be thrown. Subclasses can disable this behavior.

Throws: Error
if called with rootPaneChecking true
Overrides:
setLayout in class Container
See Also:
setRootPaneCheckingEnabled
o getRootPane 
 public JRootPane getRootPane()
Returns the rootPane object for this window.

See Also:
setRootPane, getRootPane
o setRootPane 
 protected void setRootPane(JRootPane root)
Sets the rootPane property. This method is called by the constructor.

Parameters:
root - the rootPane object for this window
See Also:
getRootPane
o getContentPane 
 public Container getContentPane()
Returns the contentPane object for this window.

Returns:
the Container which is the contentPane
See Also:
setContentPane, getContentPane
o setContentPane 
 public void setContentPane(Container contentPane)
Sets the contentPane property. This method is called by the constructor.

Parameters:
contentPane - the contentPane object for this window
Throws: IllegalComponentStateException
(a runtime exception) if the content pane parameter is null
See Also:
getContentPane, setContentPane
o getLayeredPane 
 public JLayeredPane getLayeredPane()
Returns the layeredPane object for this window.

Returns:
the JLayeredPane object
See Also:
setLayeredPane, getLayeredPane
o setLayeredPane 
 public void setLayeredPane(JLayeredPane layeredPane)
Sets the layeredPane property. This method is called by the constructor.

Parameters:
layeredPane - the layeredPane object for this window
Throws: IllegalComponentStateException
(a runtime exception) if the content pane parameter is null
See Also:
getLayeredPane, setLayeredPane
o getGlassPane 
 public Component getGlassPane()
Returns the glassPane object for this window.

Returns:
the Component which is the glassPane
See Also:
setGlassPane, getGlassPane
o setGlassPane 
 public void setGlassPane(Component glassPane)
Sets the glassPane property. This method is called by the constructor.

Parameters:
glassPane - the glassPane object for this window
See Also:
getGlassPane, setGlassPane
o getAccessibleContext 
 public AccessibleContext getAccessibleContext()
Get the AccessibleContext associated with this JWindow

Returns:
the AccessibleContext of this JWindow 
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