WindowStateListener (Java SE 21 & JDK 21)
Description: declaration: module: java.desktop, package: java.awt.event, interface: WindowStateListener
Keywords: java.awt.event.WindowStateListener interface

Module java.desktop
Package 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

  Modifier and Type
  Method
  Description
  `void`
  `windowStateChanged(WindowEvent e)`
  Invoked when window state is changed.

- ## Method Details

  - ### windowStateChanged

    void windowStateChanged(WindowEvent e)
    Invoked when window state is changed.
    Parameters:
      `e` - the event to be processed