JPanel panelCont=new JPanel(); // container
JPanel panelFirst=new JPanel(); // first interface
JPanel panelSecond=new GamePanel(); // seconde interface

JButton buttonOne=new JButton("New Game");
JButton buttonSecond=new JButton("Score");
JButton buttonThird=new JButton("Quit");

CardLayout cl=new CardLayout();


public CLayout() {

    panelCont.setLayout(cl);
    // ajouter les buttons dans la premire interface
    panelFirst.add(buttonOne);
    panelFirst.add(buttonSecond);
    panelFirst.add(buttonThird);
    panelFirst.setBackground(Color.BLUE);
    //panelSecond.setBackground(Color.red);
    panelCont.add(panelFirst,"1");
    panelCont.add(panelSecond, "2");
    cl.show(panelCont, "1");
    buttonOne.addActionListener(new ActionListener(){

        @Override
        public void actionPerformed(ActionEvent arg0) {
            // TODO Auto-generated method stub
            cl.show(panelCont,"2"); // sends you to the seconde panel
        }
    });
    frame.add(panelCont);
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    frame.pack();
    frame.setVisible(true);
}
public static void main(String [] args) {
    SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            new CLayout();
        }
    });
}