Change panel's content?

Question

Hi, All!
I have JPanel (pC) with other JPanel(p1) and JButton. I want to change p1 to p2 on click button, but I don't see expected result.
class testChange extends JFrame implements ActionListener {
     JPanel p1=new JPanel(),
          p2=new JPanel(),
          p3=new JPanel(),
          pC=new JPanel();
     static int count=0;
     testChange () {
          p1.add(new JLabel("Panel 1"));
          p2.add(new JLabel("Panel 2"));
          p3.add(new JLabel("Panel 3"));
          JPanel pC=new JPanel(new GridLayout(3,0));
          JButton b=new JButton("Next");
          b.addActionListener (this);
          pC.add(b);
          getContentPane().add(pC);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          pack();
          setVisible(true);
     public void actionPerformed (ActionEvent e) {
          switch (count) {
               case 0:
                    pC.add(p1);
                    pC.repaint();
                    pC.validate();
                    count++;
                    break;
               case 1:
                    pC.remove(p1);
                    pC.add(p2);
                    pC.repaint();
                    pC.validate();
                    count++;
          break;
               case 2:
                    pC.remove(p2);
                    pC.add(p3);
                    pC.repaint();
                    pC.validate();
                    count++;
          break;
               case 3:
                    pC.remove(p3);
                    pC.add(p1);
                    pC.repaint();
                    pC.validate();
                    count=0;
          break;
public static void main (String [] argv) {
          new testChange();
Who can hint me why after click button don't change panels (p1->p2->p3->p1) on JPanel pC?
Thanks.

Answer 1

The CardLayout looks like just the thing you need.
Check http://java.sun.com/docs/books/tutorial/uiswing/layout/card.html for examples.