cardlayoutdemo.java

一个十分好的java基础学习的课件

import java.awt.*;
import java.applet.Applet;

public class CardLayoutDemo extends Applet
{   public void init( )
    {   p1=new Panel( );
        p1.add(new Button("Card 1"));
        p1.add(new Button("Card 2"));
        p1.add(new Button("Card 3"));
        p1.add(new Button("Card 4"));
        add("North",p1);

        Panel card1=new Panel( );
        card1.add(new Label("This is the first Card"));

        Panel card2=new Panel( );
        card2.add(new Label("This is the Second Card"));

        Panel card3=new Panel( );
        card3.add(new Label("This is the Third Card"));

        Panel card4=new Panel( );
        card4.add(new Label("This is the Forth Card"));

        p2=new Panel( );
        layout=new CardLayout( );
        p2.setLayout(layout);
        p2.add("Card 1",card1);
        p2.add("Card 2",card2);
        p2.add("Card 3",card3);
        p2.add("Card 4",card4);
        add("Center",p2);
    }
    
    public boolean action(Event e,Object a)
    {   if((e.target instanceof Component)&&((Component)e.target).getParent( ).equals(p1))
            layout.show(p2,(String)a);
        else
            return super.action(e,a);
        return true;
    }
    
    private Panel p1;
    private Panel p2;
    private CardLayout layout;
}