import java.awt.*; 
import java.awt.event.*;
import javax.swing.*;

public class LayoutTest {
    public static void main(String[] args) {
	LayoutTestFrame test = new LayoutTestFrame(); 

	JPanel cards = new JPanel(); 
	CardLayout cl = new CardLayout(5,5);
	cards.setLayout(cl);

	class ButtonHandler implements ActionListener {
	    public void actionPerformed(ActionEvent evt) {
		CardLayout layout = (CardLayout) cards.getLayout();
		layout.next(cards);
	    }
	}

	// the listener
	ButtonHandler bh = new ButtonHandler();
	
	// add components
	JButton ok = new JButton("ok"); 
	ok.setBackground(Color.green); 
	ok.setOpaque(true);
	ok.addActionListener(bh); 
	
	JButton cancel = new JButton("cancel"); 
	cancel.setBackground(Color.red);
	cancel.setOpaque(true);
	cancel.addActionListener(bh); 

	JPanel questionPanel = new JPanel(); 
	JLabel question = new JLabel("Save file?"); 
	question.setBackground(Color.yellow);
	question.setOpaque(true);

	JButton next = new JButton("next"); 
	next.addActionListener(bh); 
	
	questionPanel.add(question); 
	questionPanel.add(next);
	
	cards.add(questionPanel);
	cards.add(ok); 
	cards.add(cancel); 

	test.getContentPane().add(cards);
	test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	test.setVisible(true); 
    }
}

class LayoutTestFrame extends JFrame {
    public LayoutTestFrame() {
	setBackground(Color.lightGray);
	setSize(400,300);
	setLocation(100,100);
    }
}