/** A very simple expamle of a Java GUI applet
 **/

// AWT components and Event classes used:

import java.applet.Applet;
import java.awt.Button;
import java.awt.Frame;

import java.awt.event.ActionListener;   // interface
import java.awt.event.ActionEvent;      // events that interface relates to

public class SimpleApplet extends Applet implements ActionListener {

  // we don't need a frame; the applet itself is a kind of
  // (extends a) GUI component container called a Panel.
  private Button doSomethingButton = null;

  /** Constructor: make a frame to hold the GUI components and the
   ** GUI components themselves.
   **/
  public void init() {
    doSomethingButton = new Button("Do Something");

    // This object that is being constructed agrees to listen for
    // events the button will generate.
    doSomethingButton.addActionListener(this);

    // add the button to the applet
    add(doSomethingButton);
  }

  /** run the application
   **/
  public void start() {
    // the browser will make the components visible
  }

  public void stop() {
  }

  public void destroy() {
  }

  public void actionPerformed(ActionEvent e) {
    // Where do you think thhis output will appear?
    System.out.println("You pressed the button");
  }
}