I try to attach a KeyListener to my JComponent but no
keystrokes make it to the JComponent. MouseMotions, on
the other hand, are percieved by the JComponent. I do not
understand where the keystrokes go, since both Listeneres
are attached in identical ways. This code illustrates the
problem. When the mouse is moved over the JFrame,
a long stream of 'mouseMoved()' messages is send to
stdout. Pressing keys when the JFrame has focus yields
no output.

//class MouseAndKeys
class MouseAndKeys extends javax.swing.JComponent
{

//constructor
MouseAndKeys()
{
 super();
 addMouseMotionListener(new javax.swing.event.MouseInputAdapter()
 {
  public void mouseMoved(java.awt.event.MouseEvent a)
  {
   System.out.println("mouseMoved()");
  }
 });
 addKeyListener(new KeyAdapter()
 {
  public void keyPressed(java.awt.event.KeyEvent a)
  {
   System.out.println("keyPressed()");
  }
 });
}

//main
public static void main(String[]a)
{
 javax.swing.JFrame jframe=new javax.swing.JFrame("MouseAndKeys");
 jframe.getContentPane().add(new MouseAndKeys());
 jframe.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
 jframe.pack();
 jframe.setSize(610,377);
 jframe.setVisible(true);
}
}