Module java.desktop
Package 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

    Modifier and Type
    Method
    Description
    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 Details

    • 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.
      Parameters:
      e - the event to be processed

    • 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.
      Parameters:
      e - the event to be processed

    • 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.
      Parameters:
      e - the event to be processed