disposedialogdemo.java

java 完全探索的随书源码

// DisposeDialogDemo.java

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

class DisposeDialogDemo
{
   public static void main (String [] args)
   {
      Frame f = new Frame ("Dialog Demo");
      f.setSize (200, 100);
      f.setVisible (true);

      AreYouSure ays = new AreYouSure (f, "Is the sky blue?");

      if (ays.getState () == true)
          System.out.println ("Yes, the sky is blue.");
      else
          System.out.println ("No, the sky is not blue.");

      System.exit (0);
   }
}

class AreYouSure extends Dialog implements ActionListener
{
   private boolean state;

   AreYouSure (Frame f, String title)
   {
      super (f, title, true); // Ensure dialog is modal

      Panel p = new Panel ();

      Button b = new Button ("Yes");
      b.addActionListener (this);
      p.add (b);

      b = new Button ("No");
      b.addActionListener (this);
      p.add (b);

      add (p);

      setSize (200, 100);
      setResizable (false);
      setVisible (true);
   }

   public void actionPerformed (ActionEvent e)
   {
      if (e.getActionCommand ().equals ("Yes"))
          state = true;
      else
          state = false;

      dispose ();
   }

   public boolean getState ()
   {
      return state;
   }
}