处理键和鼠标侦听器

Question

如何在JPanel中同时处理鼠标和键监听器？ 我尝试添加混合侦听器，并设置JPanel的setFocusable（true）：

class MyListener implements MouseListener, KeyListener {

    public void mouseClicked(MouseEvent e) {}
    public void mousePressed(MouseEvent e) {}
    public void mouseReleased(MouseEvent e) {}
    public void mouseEntered(MouseEvent e) {}
    public void mouseExited(MouseEvent e) {}

    public void keyTyped(KeyEvent e) {}
    public void keyPressed(KeyEvent e) {}
    public void keyReleased(KeyEvent e) {}
}

但是当按下键时，鼠标监听器不会听动作，如何处理？