一个AWT程序

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

/**
 * @author Administrator
 */
public class NewJApplet extends javax.swing.JApplet {  
    /** Creates a new instance of NewJApplet */
    public void init()
    {
        Button eventSource=new Button("exent button");
        eventSource.addActionListener(new ButtonListener(this));
        add(eventSource);
    }
}
class ButtonListener implements ActionListener
{
  private Applet applet;
  public ButtonListener(Applet applet)
    {
        this.applet=applet;
    }
    public void actionPerformed(ActionEvent event)
    {
        Button source=(Button)event.getSource();
        applet.showStatus(source.getLabel()+"actived");
    }
}