KeyListener (Java SE 10 & JDK 10 )
Keywords: java.awt.event.KeyListener interface

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

    All Methods Instance Methods Abstract Methods
    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 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.
      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