mixedhello.java

来自「java 完全探索的随书源码」· Java 代码 · 共 60 行

// MixedHello.java

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

class MixedHello extends JFrame implements ActionListener
{
   Button b1;
   JButton b2;

   static String [] labels =
   {
      "Hello! Welcome to mixed Swing!",
      "This program mixes an AWT button with a Swing button.",
      "You cannot assign icons to AWT buttons.",
      "You can assign icons to Swing buttons."
   };

   int nextLabel;

   MixedHello (String title)
   {
      super (title);

      addWindowListener (new WindowAdapter ()
                         {
                             public void windowClosing (WindowEvent e)
                             {
                                System.exit (0);
                             }
                         });

      Panel p = new Panel ();
      b1 = new Button ("AWT button");
      b1.addActionListener (this);
      p.add (b1);
      b2 = new JButton (labels [nextLabel++],
                       new ImageIcon ("bullet.gif"));
      b2.addActionListener (this);
      p.add (b2);
      setContentPane (p);

      setSize (400, 100);
      setVisible (true);
   }

   public void actionPerformed (ActionEvent e)
   {
      b2.setText (labels [nextLabel++]);
      nextLabel %= labels.length;
   }

   public static void main (String [] args)
   {
      new MixedHello ("Hello, Mixed Version");
   }
}