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📄 buttondemo.java

📁 java 完全探索的随书源码
💻 JAVA
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// ButtonDemo.java

import javax.swing.*;

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

class ButtonDemo extends JFrame implements ActionListener
{
   ButtonDemo (String title)
   {
      super (title);

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

      JButton jb = new JButton ("Ok", new ImageIcon ("bullet.gif"));
      jb.setHorizontalAlignment (SwingConstants.LEFT);
      jb.setToolTipText ("Press Ok to terminate the program.");
      jb.addActionListener (this);

      jb.setMnemonic ('O');

      getContentPane ().add (jb, BorderLayout.CENTER);

      jb = new JButton ("<html><i>Cancel</i></html>");
      jb.setVerticalAlignment (SwingConstants.BOTTOM);
      jb.setToolTipText ("Press Cancel to terminate the program.");
      jb.addActionListener (this);

      jb.setDefaultCapable (true);

      getContentPane ().add (jb, BorderLayout.EAST);

      getRootPane ().setDefaultButton (jb);

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

   public void actionPerformed (ActionEvent e)
   {
      if (e.getActionCommand ().equals ("Ok"))
          System.out.println ("OK was pressed.");
      else
          System.out.println ("Cancel was pressed.");

      System.exit (0);
   }

   public static void main (String [] args)
   {
      new ButtonDemo ("Button Demo");
   }
}

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