import java.awt.Toolkit; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 

public class Test 
{ 
public static void main(String[] args) 
{ 
PrimaryFrame w = new PrimaryFrame(); 
w.setBounds(100, 100, 400, 400); 
w.setVisible(true); 
} 
} 

class PrimaryFrame extends JFrame 
{ 
public PrimaryFrame() 
{ 
JPanel top = (JPanel) getContentPane(); 
top.setToolTipText("Click on me!"); 
top.addMouseListener(new MouseAdapter() 
{ 
@Override 
public void mouseReleased(MouseEvent e) 
{ 
Toolkit.getDefaultToolkit().beep(); 
} 
}); 
} 
}