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Showing content from https://docs.oracle.com/en/java/javase/19/docs/api/java.desktop/java/awt/event/KeyAdapter.html below:

KeyAdapter (Java SE 19 & JDK 19)

All Implemented Interfaces:

KeyListener, EventListener

Direct Known Subclasses:

BasicComboBoxUI.KeyHandler, BasicComboPopup.InvocationKeyHandler, BasicTreeUI.KeyHandler

An abstract adapter class for receiving keyboard events. The methods in this class are empty. This class exists as convenience for creating listener objects.

Extend this class to create a KeyEvent listener and override the methods for the events of interest. (If you implement the KeyListener interface, you have to define all of the methods in it. This abstract class defines null methods for them all, so you can only have to define methods for events you care about.)

Create a listener object using the extended class and then register it with a component using the component's addKeyListener method. When a key is pressed, released, or typed, the relevant method in the listener object is invoked, and the KeyEvent is passed to it.

Since:

1.1

See Also:

• KeyEvent
• KeyListener
• Tutorial: Writing a Key Listener

• Constructor Summary

  Constructors

• Method Summary

  void

  Invoked when a key has been pressed.

  void

  Invoked when a key has been released.

  void

  Invoked when a key has been typed.

  Methods declared in class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Constructor Details
  • KeyAdapter

    protected KeyAdapter()

    Constructs a KeyAdapter.

• Method Details
  • keyTyped

    Invoked when a key has been typed. This event occurs when a key press is followed by a key release.

    Specified by:

    keyTyped in interface KeyListener

    Parameters:

    e - the event to be processed

  • keyPressed

    Invoked when a key has been pressed.

    Specified by:

    keyPressed in interface KeyListener

    Parameters:

    e - the event to be processed

  • keyReleased

    Invoked when a key has been released.

    Specified by:

    keyReleased in interface KeyListener

    Parameters:

    e - the event to be processed

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