myapplet3.java

来自「java 完全探索的随书源码」· Java 代码 · 共 55 行

// MyApplet3.java

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

public class MyApplet3 extends java.applet.Applet
                       implements ActionListener
{
   Button b;

   public void init ()
   {
      b = new Button ("Open frame");
      b.addActionListener (this);
      add (b);
   }

   public void actionPerformed (ActionEvent e)
   {
      b.setEnabled (false);
      new MyFrame ("MyFrame", b);
   }
}

class MyFrame extends Frame implements ActionListener
{
   private Button launch;

   MyFrame (String title, Button launch)
   {
      super (title);

      // Assign launch argument to launch field.

      this.launch = launch;

      Button b = new Button ("Close Frame");
      b.addActionListener (this);

      Panel p = new Panel ();
      p.add (b);

      add (p);

      setSize (200, 80);
      setVisible (true);
   }

   public void actionPerformed (ActionEvent e)
   {
      dispose ();
      launch.setEnabled (true);
   }
}