buttontest.java.bak

JButton的一个实例 用于检测其反转功能

 // Fig. 12.10: ButtonTest.java
    // Creating JButtons.
    
    // Java core packages
    import java.awt.*;
    import java.awt.event.*;
    
    // Java extension packages
    import javax.swing.*;
   
   public class ButtonTest extends JFrame {
      private JButton plainButton, fancyButton;
   
      // set up GUI
      public ButtonTest()
      {
         super( "Testing Buttons" );
   
         // get content pane and set its layout
         Container container = getContentPane();
         container.setLayout( new FlowLayout() );
   
         // create buttons
       plainButton = new JButton( "Plain Button" );
         container.add( plainButton );
   
         Icon bug1 = new ImageIcon( "6691a200461912265523010.jpg" );
         Icon bug2 = new ImageIcon( "1086340634_4311.jpg" );
         fancyButton = new JButton( "Fancy Button", bug1 );
         fancyButton.setRolloverIcon( bug2 );
         container.add( fancyButton );
   
         // create an instance of inner class ButtonHandler
         // to use for button event handling 
         ButtonHandler handler = new ButtonHandler();
         fancyButton.addActionListener( handler );
         plainButton.addActionListener( handler );
   
         setSize( 500, 600 );
         setVisible( true );
      }
   
      // execute application
      public static void main( String args[] )
      { 
         ButtonTest application = new ButtonTest();
   
         application.setDefaultCloseOperation(
            JFrame.EXIT_ON_CLOSE );
      }
   
      // inner class for button event handling
      private class ButtonHandler implements ActionListener {
   
         // handle button event
         public void actionPerformed( ActionEvent event )
         {
            JOptionPane.showMessageDialog( null,
               "You pressed: " + event.getActionCommand() );
         }
   
      }  // end private inner class ButtonHandler
   
   }  // end class ButtonTest