Java基础之CardLayout的使用

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ShowCardLayout 
		extends MouseAdapter{
		private JFrame f;
		private JPanel p1,p2,p3;
		private JLabel lb1,lb2,lb3;
		private CardLayout myCard;
		private Container c;
		public ShowCardLayout(){
		f=new JFrame("CardLayout示例");
		myCard=new CardLayout(5,10);
		p1=new JPanel();
		p2=new JPanel();
		p3=new JPanel();
		lb1=new JLabel(
				new ImageIcon("1.png"));
		lb2=new JLabel(
				new ImageIcon("2.png"));
		lb3=new JLabel(
				new ImageIcon("3.png"));
		}
		public void launchFrame(){
			c=f.getContentPane();
			c.setLayout(myCard);		
			p1.add(lb1);
			p2.add(lb2);
			p3.add(lb3);
			p1.addMouseListener(this);
			p2.addMouseListener(this);
			p3.addMouseListener(this);
			c.add(p1,"First");
			c.add(p2,"Second");
			c.add(p3,"Third");
			myCard.show(c,"Third");
			f.pack();
			f.setVisible(true);
			f.setDefaultCloseOperation(
				JFrame.EXIT_ON_CLOSE);
		}
		public void mousePressed(MouseEvent e){
			myCard.next(c);
		}
		public static void main(String args[]) {
			ShowCardLayout sc=
					new ShowCardLayout();
			sc.launchFrame();
		}
}