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Listing 2. Demo Button with Inner Class ActionListener

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
/** This is another ButtonDemo Application
 * @version $Id: ButtonDemo2.java,v 1.2
 * 1999/01/25 19:07:00 ian Exp $
 */
public class ButtonDemo2 extends JFrame {
  JButton b1, b2;
  /** Construct a ButtonDemo2 */
  public ButtonDemo2() {
    super("Linux Journal Button Demo");
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    // An Inner Class for implementing the action
    // listeners
    class MyActionListener implements ActionListener
    {
      String buttonMessage;
      public void actionPerformed(ActionEvent event)
      {
        System.out.println("Thanks for pushing " +
          buttonMessage);
        System.exit(0);
      }
      MyActionListener(String msg) {
        buttonMessage = msg;
      }
    }
    cp.add(b1 = new JButton("Button 1"));
    b1.addActionListener(new MyActionListener(
      "Button 1"));
    cp.add(b2 = new JButton("Button 2"));
    b2.addActionListener(new MyActionListener(
      "Button 2"));
    pack();
  }
  public static void main(String av[]) {
      new ButtonDemo2().setVisible(true);
  }
}