WindowStateListener (Java Platform SE 8 )
Keywords: java.awt.event.WindowStateListener interface
Date: 2026-08-19

java.awt.event

## Interface WindowStateListener

- All Superinterfaces:
    EventListener
  All Known Implementing Classes:
    AWTEventMulticaster, BasicToolBarUI.FrameListener, JMenu.WinListener, WindowAdapter

      public interface WindowStateListener
      extends EventListener

  The listener interface for receiving window state events.

  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.

  Since:
    1.4
  See Also:
    `WindowAdapter`, `WindowEvent`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `windowStateChanged(WindowEvent e)` Invoked when window state is changed.

- - ### Method Detail

    - #### windowStateChanged

          void windowStateChanged(WindowEvent e)

      Invoked when window state is changed.

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