b2 = new JButton("Click Me!");
b2.addActionListener(this);
cp.add(b2);

• i1 = new ImageIcon("red-ball.gif");
  b3 = new JButton("Red-Ball",i1);
  b3.addActionListener(this);
  cp.add(b3);
• b4 = new JButton();
  b4.addActionListener(this);
  b4.setText("OK");
  cp.add(b4);
• }
• public void actionPerformed(ActionEvent ae)
  {
  Object o;
  o = ae.getSource();
  if(o == b1)
  { t1.setText("Cyan-Ball is Clicked"); }
  else if(o == b2)
  { t1.setText("Button 2 is Clicked"); }
  else if(o == b3)
  { t1.setText("Red Ball is Clicked"); }
  else if(o == b4)
  { t1.setText(b4.getText()); }
• }
• }
  

• Output:

•