import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class bt2 extends JFrame
		 implements ActionListener
{
 JLabel l1;
 JButton b1;

 public bt2 ()
  {
   super ("Testing JButton");

   Container c = getContentPane ();
   c.setLayout (new FlowLayout() );
  
   l1 = new JLabel ("Hello");
   c.add (l1);

   b1 = new JButton ("Press Here");
   b1.addActionListener (this);
   b1.addMouseListener (new MouseClickHandler() ); 
   c.add (b1);
  
   setSize (200, 100);
   show ();
  }

 public void actionPerformed (ActionEvent e)
  {
   String s = "";

   s = s + "SHIFT_MASK: " + e.SHIFT_MASK;
   s = s + "\nCTRL_MASK: " + e.CTRL_MASK;
   s = s + "\nMETA_MASK: " + e.META_MASK;
   s = s + "\nALT_MASK: " + e.ALT_MASK;

   JOptionPane.showMessageDialog (null, s);
  }

 public static void main (String[] args)
 {
  bt2 app = new bt2 ();
 
  app.addWindowListener ( new WindowAdapter ()
      {
       public void windowClosing (WindowEvent e)
         {
          System.exit (0);
         }
      }
    );
 }


private class MouseClickHandler extends MouseAdapter
{
 public void mouseClicked (MouseEvent e)
   {
    String s = "";

    if ( e.isMetaDown () )
        s = "Right Mouse Click";
    else if (e.isAltDown () )
        s = "Center Mouse Click";
    else
        s = "Left Mouse Click";

    JOptionPane.showMessageDialog (null, s);
   }
}
}