Java™ Platform
Standard Ed. 6

java.awt.event
Interface KeyListener

All Superinterfaces:
EventListener
All Known Implementing Classes:
AWTEventMulticaster, BasicComboBoxUI.KeyHandler, BasicComboPopup.InvocationKeyHandler, BasicTableUI.KeyHandler, BasicTreeUI.KeyHandler, KeyAdapter

public interface KeyListener
extends EventListener

The listener interface for receiving keyboard events (keystrokes). The class that is interested in processing a keyboard event either implements this interface (and all the methods it contains) or extends the abstract KeyAdapter class (overriding only the methods of interest).

The listener object created from that class is then registered with a component using the component's addKeyListener method. A keyboard event is generated when a key is pressed, released, or typed. The relevant method in the listener object is then invoked, and the KeyEvent is passed to it.

Since:
1.1
See Also:
KeyAdapter, KeyEvent, Tutorial: Writing a Key Listener

Method Summary
 void keyPressed(KeyEvent e)
          Invoked when a key has been pressed.
 void keyReleased(KeyEvent e)
          Invoked when a key has been released.
 void keyTyped(KeyEvent e)
          Invoked when a key has been typed.
 

Method Detail

keyTyped

void keyTyped(KeyEvent e)
Invoked when a key has been typed. See the class description for KeyEvent for a definition of a key typed event.


keyPressed

void keyPressed(KeyEvent e)
Invoked when a key has been pressed. See the class description for KeyEvent for a definition of a key pressed event.


keyReleased

void keyReleased(KeyEvent e)
Invoked when a key has been released. See the class description for KeyEvent for a definition of a key released event.


Java™ Platform
Standard Ed. 6

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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.


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