Re: addKeyListener is NOT working

From:
Vova Reznik <address@mail.com>
Newsgroups:
comp.lang.java.help
Date:
Tue, 23 May 2006 18:53:32 GMT
Message-ID:
<MSIcg.13968$fb2.485@newssvr27.news.prodigy.net>
Lars Willich wrote:

When I press a key the keyPressed() procedure is NOT called. Why ?
In contrast the button events working successfully.

Possible the key-Event is not forwarded to the "outer" level.
How do I forward these events otherwise?

public class xxx extends JFrame implements ActionListener, KeyListener {
      boolean inAnApplet = true;

      public xxx() {
      
         ...
         mybutton.addActionListener(this);
         ...
         addKeyListener(this);
         ...
         ...
         addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                   if (inAnApplet) {
                       dispose();
                   } else {
                       System.exit(0);
                   }
               }
           });
          }
          
      public void keyPressed(KeyEvent e) {
     System.out.println("In KeyPressed"); // never reached !!
     ... }
    
     public void actionPerformed(ActionEvent e){
        System.out.println("In ActPerf"); //reached !!
        ... }
      }

   public static void main(String args[]) {
      ...
      xxx window = new xxx();
      }

Lars


Because a button is not in focus.
You may set your button as default button
JRootPane#setDefaultButton(JButton)
or read comments for
JComponent#registerKeyboardAction
or AbstractButton#setMnemonic()

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