import java.awt.*;
import java.awt.event.*;
public class CardLayoutDemo extends Frame implements MouseListener{

    private Button first=new Button("A");
    private Button second=new Button("B");
    private Button third=new Button("C");
    private CardLayout cl=new CardLayout();
    private Panel cards=new Panel();

    public CardLayoutDemo(String string){
        super(string);
        init();    //调用init方法
    }
    
    public void init(){
        setLayout(new BorderLayout());
        setSize(500, 500);
        
        Panel p=new Panel();
        p.setLayout(new FlowLayout());
        
        first.addMouseListener(this);
        second.addMouseListener(this);
        third.addMouseListener(this);
        
        p.add(first);
        p.add(second);
        p.add(third);
        
        add("North",p);
        cards.setLayout(cl);
        cards.add("First cards",new Button("AA"));
        cards.add("second Button",new Button("BB"));
        cards.add("third cards",new Button("CC"));
        add("Center",cards);
        
        addWindowListener(new WindowAdapter(){
            public void WindowClosing(WindowEvent evt){
                setVisible(false);
                dispose();
                System.exit(0);
            }
        });
        
        setVisible(true);
    }
    
    public static void main(String[] args) {
        new CardLayoutDemo("ABCD");   //创建CardLayoutDemo类型变量    
    
    }
    
public void mouseClicked(MouseEvent evt){
    if(evt.getSource()==first){
    cl.first(cards);
}
else if(evt.getSource()==second){
    cl.first(cards);
    cl.next(cards);
}
else if(evt.getSource()==third){
    cl.last(cards);
}
}
    public void mouseEntered(MouseEvent arg0){
    }
    public void mouseExited(MouseEvent arg0){
    }
    public void mousePressed(MouseEvent arg0){
    }
    public void mouseReleased(MouseEvent arg0){
    }
    
}