代码如下:
package QAppLet;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.awt.Button;
class Pannel extends Panel{
Pannel(String s){
setLayout(new BorderLayout());
add("Cdnter",new Button(s));
add("East",new Button(s));
add("West",new Button(s));
add("South",new Button(s));
add("North",new Button(s));
}
}
public class PanLayout extends Applet{
Button first=new Button("first card"),second=new Button("second card"),
third=new Button("third card");
Panel Card=new Panel();
CardLayout c1=new CardLayout();
public void init(){
setLayout(new BorderLayout());
Panel p=new Panel();
p.setLayout(new FlowLayout());
p.add(first);
p.add(second);
p.add(third);
add("North",p);
Card.setLayout(c1);
Card.add("card1",new Pannel("In the first card"));
Card.add("card2", new Pannel("In the second card"));
Card.add("card3", new Pannel("In the third card"));
first.addActionListener(new ActionButton());
second.addActionListener(new ActionButton());
third.addActionListener(new ActionButton());
}
class ActionButton implements ActionListener{
public void actionPerformed(ActionEvent e){
Object source=e.getSource();
if(source==first){
c1.first(Card);
}
else if(source==second){
c1.first(Card);
c1.next(Card);
}
else if(source==third){
c1.last(Card);
}
}
}
}