KeyListener

[Tim Alvord]

I have a JFrame to which I have added JButtons.

public class MyClass extends JFrame implements ActionListener, KeyListener
{
    win=new JFrame("MyFrame");
    win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    win.setBounds(400,200,335,630);
    win.setResizable(false);

    Container c=win.getContentPane();
    c.setBackground(Color.black);

    btnA = new JButton("A");
    btnA.setForeground(Color.white);
    btnA.setBackground(Color.black);

    c.add(btnA);

    public void actionPerformed(ActionEvent e)
    {
        if (e.getSource()==btnAbout)
        {
            AboutDialog frmAbout = new AboutDialog(win, "MyProgram");
        }
    }

    @Override
    public void keyPressed(KeyEvent e)
    {
    }

    @Override
    public void keyReleased(KeyEvent e)
    {
    }

    @Override
    public void keyTyped(KeyEvent e)
    {
    }
}

Where do I add the KeyListener to? win or c? I've tried both and the code never calls keyPressed(), keyReleased() or keyTyped()...

Any ideas on what I'm doing wrong?

[Campbell Ritchie]

Welcome to the Ranch

My, we have a lot of compiler errors in that code! Have you come across the Java Tutorials yet? I think that link will help you
I think the bit you have missed out is that you have to add the Listener to something.

[Campbell Ritchie]

Once I got rid of the many compiler errors, btnA.addKeyListener(this); seemed to do the trick. I had to click the button so it gained focus, then push a key.

[Tim Alvord]

Campbell,
If I attach the KeyListener to the button I have no problem. I need or would like anyway to attach it to the Frame or Container... I have alot of JButtons on the form and would rather not have to attach a KeyListener to all of them. I'd rather attach it to the Frame and then press the appropriate button...

[Michael Dunn]

KeyListeners will not work the you want them to.

KeyBindings is how you do it.

[Campbell Ritchie]

…and this is where you can learn about key bindings.