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

class MyGUI {
   public static void main(String[] args) {
      JFrame frame = new JFrame("GUI");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      Container pane = frame.getContentPane();
      Font bigger = pane.getFont().deriveFont((float)40);

      JPanel displayPanel = new JPanel();
      JPanel buttonPanel = new JPanel();
      pane.setLayout(new BorderLayout());
      pane.add(displayPanel, BorderLayout.NORTH);
      pane.add(buttonPanel, BorderLayout.SOUTH);

      JLabel display = new JLabel("Hello");
      display.setFont(bigger);
      displayPanel.add(display);

      JButton button1 = new JButton("Tickle");
      button1.setFont(bigger);
      JButton button2 = new JButton("Pinch");
      button2.setFont(bigger);
      buttonPanel.add(button1);
      buttonPanel.add(button2);     

      MyListener listener1 = new MyListener(display, "Hee hee hee");
      button1.addActionListener(listener1);

      MyListener listener2 = new MyListener(display, "Ouch!");
      button2.addActionListener(listener2);

      frame.pack();
      frame.setVisible(true);
   }  // end of main()

}  // end of class MyGUI

class MyListener implements ActionListener {
   JLabel myLabel;
   String myMessage;

   // constructor
   MyListener(JLabel label, String message) { 
      myLabel = label;
      myMessage = message;
   }  

   public void actionPerformed(ActionEvent e) {
      myLabel.setText(myMessage);
   }

}  // end of class MyListener