哪位大侠能做一个CardLayout 的示例程序？

Question

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;public class CardDeck extends JFrame
                      implements ActionListener {
   private CardLayout cardManager;
   private JPanel deck;
   private JButton controls[];
   private String names[] = { "First card", "Next card",
                              "Previous card", "Last card" };   public CardDeck()
   {
      super( "CardLayout " );      Container c = getContentPane();      // create the JPanel with CardLayout
      deck = new JPanel();
      cardManager = new CardLayout(); 
      deck.setLayout( cardManager );        // set up card1 and add it to JPanel deck
      JLabel label1 =
         new JLabel( "card one", SwingConstants.CENTER );
      JPanel card1 = new JPanel();
      card1.add( label1 ); 
      deck.add( card1, label1.getText() ); // add card to deck
      
      // set up card2 and add it to JPanel deck
      JLabel label2 =
         new JLabel( "card two", SwingConstants.CENTER );
      JPanel card2 = new JPanel();
      card2.setBackground( Color.yellow );
      card2.add( label2 );
      deck.add( card2, label2.getText() ); // add card to deck      // set up card3 and add it to JPanel deck
      JLabel label3 = new JLabel( "card three" );
      JPanel card3 = new JPanel();
      card3.setLayout( new BorderLayout() );  
      card3.add( new JButton( "North" ), BorderLayout.NORTH );
      card3.add( new JButton( "West" ), BorderLayout.WEST );
      card3.add( new JButton( "East" ), BorderLayout.EAST );
      card3.add( new JButton( "South" ), BorderLayout.SOUTH );
      card3.add( label3, BorderLayout.CENTER );
      deck.add( card3, label3.getText() ); // add card to deck      // create and layout buttons that will control deck
      JPanel buttons = new JPanel();
      buttons.setLayout( new GridLayout( 2, 2 ) );
      controls = new JButton[ names.length ];      for ( int i = 0; i < controls.length; i++ ) {
         controls[ i ] = new JButton( names[ i ] );
         controls[ i ].addActionListener( this );
         buttons.add( controls[ i ] );
      }      // add JPanel deck and JPanel buttons to the applet
      c.add( buttons, BorderLayout.WEST );
      c.add( deck, BorderLayout.EAST );      setSize( 450, 200 );
      show();
   }   public void actionPerformed( ActionEvent e )
   {
      if ( e.getSource() == controls[ 0 ] )    
         cardManager.first( deck ); // show first card
      else if ( e.getSource() == controls[ 1 ] )    
         cardManager.next( deck );  // show next card
      else if ( e.getSource() == controls[ 2 ] )
         cardManager.previous( deck );  // show previous card
      else if ( e.getSource() == controls[ 3 ] )
         cardManager.last( deck );  // show last card            
   }   public static void main( String args[] )
   {
      CardDeck cardDeckDemo = new CardDeck();      cardDeckDemo.addWindowListener(
         new WindowAdapter() {
            public void windowClosing( WindowEvent e )
            {
               System.exit( 0 );
            }
         }
      );
   }
}

Answer 1

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class CardLayoutDemo implements ActionListener{
     
     JPanel p1,p2,p3,p4;
     int i = 1;
     JFrame f;
     
    public CardLayoutDemo() {
    
     f = new JFrame();
        Container contentPane = f.getContentPane();
        contentPane.setLayout(new GridLayout(2,1));
        
        p1 = new JPanel();
        Button b = new Button("Change Card");
        b.addActionListener(this);
        p1.add(b);
        contentPane.add(p1);
        
        p2 = new JPanel();
        p2.setLayout(new FlowLayout());
        p2.add(new JButton("first"));
        p2.add(new JButton("second"));
        p2.add(new JButton("third"));
        p3 = new JPanel();
        p3.setLayout(new GridLayout(3,1));
        p3.add(new JButton("fourth"));
        p3.add(new JButton("fifth"));
        p3.add(new JButton("This is the last button"));
        p4 = new JPanel();
        p4.setLayout(new CardLayout());
        p4.add("one",p2);
        p4.add("two",p3);
        ((CardLayout)p4.getLayout()).show(p4,"one");
        
        contentPane.add(p4);
        
    f.setTitle("CardLayout");
    f.pack();
        f.setVisible(true);
        
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                    System.exit(0);
            }
        });
    }
    
    public void actionPerformed(ActionEvent event)
    {
        switch(i)
        {
            case 1:
                ((CardLayout)p4.getLayout()).show(p4,"two");
                break;
            case 2:
                ((CardLayout)p4.getLayout()).show(p4,"one");
                break;
        }
        i++;
        if (i==3)
            i=1;
            
        f.validate();
    }
         
    public static void main(String args[]) {
    
        new CardLayoutDemo();
        
    }
}