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"���ֵĴ󱦱�" <khadgar.bbs@bbs.nankai.edu.cn> д���ʼ�
news:4DB8DY$AWU@bbs.nankai.edu.cn...
> ����52�е�ButtonTest.this��ΪʲôҪ��ôд��this���ò�������ڶ�����˵����
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> javadoc��������˵�ģ�
> public static void showMessageDialog(Component parentComponent,
>                                      Object message,
>                                      String title,
>                                      int messageType)
> parentComponent - determines the Frame in which the dialog is displayed;
if
> null, or if the parentComponent has no Frame, a default Frame is used
> ����ط��ܾ�����Щת��������ϣ����ֽ�������һЩ��
> ���⣬����������֮��������.class�ļ���
> ButtonTest.class
> ButtonTest$ButtonHandler.class
> ButtonTest$1.class
> ���һ���Dz���һ�������ڲ��ָࣿ���dz����е��ĸ��ط���
>
> // Fig. 13.10: ButtonTest.java
> // Creating JButtons.
> import java.awt.*;
> import java.awt.event.*;
> 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( "bug1.gif" );
>       Icon bug2 = new ImageIcon( "bug2.gif" );
>       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( 275, 100 );
>       setVisible( true );
>
>    } // end ButtonTest constructor
>
>    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( ButtonTest.this,
>                                     //???????????????????
>             "You pressed: " + event.getActionCommand() );
>       }
>
>    } // end private inner class ButtonHandler
>
> } // end class ButtonTest
> --
> �� ��Դ:���Ұ��Ͽ�վ nkbbs.org��[FROM: 10.21.2.74]