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 its only child. The contentPane
should be the parent
of any children of the JWindow
.
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 a window as follows:
window.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 JWindow
to throw an exception. The default contentPane
will have a
BorderLayout
manager set on it.
Refer to javax.swing.RootPaneContainer
for details on adding, removing and setting the LayoutManager
of a JWindow
.
Please see the JRootPane
documentation for a complete description of
the contentPane
, glassPane
, and
layeredPane
components.
In a multi-screen environment, you can create a JWindow
on a different screen device. See java.awt.Window
for more
information.
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 java.beans.XMLEncoder
.
extends
JRootPane