How to Use CardLayout?

import java.awt.*;

public class TestCardLayout {

public static void main(String[] args){

Frame f = new Frame("TestCard Layout");

f.setSize(200,200);

f.setLayout(new CardLayout());

f.add("GraphicsPanel",new GraphicsPanel());

f.add("LabelPanel",new LabelPanel());

f.add("ButtonPanel",new ButtonPanel());

f.setVisible(true);

}