public interface WindowStateListener extends EventListener
 The class that is interested in processing a window state event
 either implements this interface (and all the methods it contains)
 or extends the abstract WindowAdapter class
 (overriding only the methods of interest).
 
 The listener object created from that class is then registered with
 a window using the Window's
 addWindowStateListener method.  When the window's
 state changes by virtue of being iconified, maximized etc., the
 windowStateChanged method in the listener object is
 invoked, and the WindowEvent is passed to it.
WindowAdapter, 
WindowEvent| Modifier and Type | Method and Description | 
|---|---|
| void | windowStateChanged(WindowEvent e)Invoked when window state is changed. | 
void windowStateChanged(WindowEvent e)
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