// LeftRight example from L&L, page 258, modified
// Illustrates one listener for multiple buttons

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

class LeftRight {

   public static void main (String[] args) {

	JFrame frame = new JFrame("Left-Right");
 	frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

	LeftRightPanel panel = new LeftRightPanel ();

	frame.getContentPane().add(panel);
	frame.pack();
	frame.setVisible(true);
   }
}

class LeftRightPanel extends JPanel implements ActionListener {

   JButton left, right;
   JLabel label;
   JPanel buttonPanel;   

   public LeftRightPanel () {

	left = new JButton ("Left");
	right = new JButton ("Right");

	left.addActionListener(this);
	right.addActionListener(this);

	label = new JLabel("Push a button");

	buttonPanel = new JPanel();
        buttonPanel.setPreferredSize (new Dimension (200, 40));
	buttonPanel.setBackground(Color.blue);
	buttonPanel.add(left);
	buttonPanel.add(right);

	setBackground (Color.cyan);
	setPreferredSize (new Dimension (200, 100));
	add(label);
	add(buttonPanel);

   }

   public void actionPerformed (ActionEvent event) {

	if (event.getSource () == left)    
	   label.setText ("Left");
	else
	   label.setText ("Right");

   }

}