testcardlayout.java

这是一个java程序

import java.awt.*;
import java.awt.event.*;
public class TestCardLayout{
	CardLayout cl = new CardLayout();
	Panel plCenter = new Panel();
	public static void main(String [] args){
		new TestCardLayout().init();
	}
	public void init(){
		Frame f=new Frame("布局管理器");
		Panel plWest = new Panel();
		f.add(plWest,"West");
		f.add(plCenter);
		
		plWest.setLayout(new GridLayout(3,1));
		Button btnPrev = new Button("prev");
		plWest.add(btnPrev);
		Button btnNext = new Button("next");
		plWest.add(btnNext);
		Button btnThree = new Button("three");
		plWest.add(btnThree);
		
		plCenter.setLayout(cl);
		plCenter.add(new Button("One"),"1");
		plCenter.add(new Button("two"),"2");
		plCenter.add(new Button("three"),"3");
		plCenter.add(new Button("four"),"4");
		plCenter.add(new Button("five"),"5");

		class MyActionListener implements ActionListener{
			public void actionPerformed(ActionEvent e){
				if(e.getActionCommand().equals("prev"))
					cl.previous(plCenter);
				else if(e.getActionCommand().equals("next"))
					cl.next(plCenter);
				else if(e.getActionCommand().equals("three"))
					cl.show(plCenter,"3");
			}
		}
		MyActionListener ma = new MyActionListener();
		btnPrev.addActionListener(ma);
		btnNext.addActionListener(ma);
		btnThree.addActionListener(ma);
				
		f.setSize(300,300);
		f.setVisible(true);
	}
}