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Java Standard Edition (SE)

KeyAdapter


java.awt.event

Class KeyAdapter

  • All Implemented Interfaces:
    KeyListener, EventListener
    Direct Known Subclasses:
    BasicComboBoxUI.KeyHandler, BasicComboPopup.InvocationKeyHandler, BasicTreeUI.KeyHandler


    public abstract class KeyAdapter
    extends Object
    implements KeyListener
    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 Detail

      • KeyAdapter

        public KeyAdapter()
    • Method Detail

      • keyTyped

        public void keyTyped(KeyEvent e)
        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


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