Making Multiple Panels invisible and visible

Question

So I have this problem, Im trying to make different panels visible and invisible by the means of a button. I believe my code is sound, but its not working. I would really appreciate it if someone were to look at my code and solve this problem. Basically my button isnt working.
import java.awt.image.*;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Scanner;
public class panels extends JFrame
private JPanel panel1, panel2, panel3, panel4;
private JLabel title;
private JButton test;
public panels ()
setSize (400,800);
JButton test = new JButton ("test");
title = new JLabel ("");
JPanel panel1 = new JPanel();
panel1.setPreferredSize(new Dimension(200,200));
panel1.setLayout (new GridLayout(5,2));
panel1.setBackground(Color.black);
JPanel panel2 = new JPanel();
panel2.setPreferredSize(new Dimension (200,200));
panel2.setBackground(Color.red);
JPanel panel3 = new JPanel();
panel3.setPreferredSize (new Dimension (200,200));
panel3.setBackground(Color.orange);
JPanel panel4 = new JPanel();
panel4.setPreferredSize(new Dimension (200,200));
panel4.setBackground(Color.green);
Container container = getContentPane ();
container.setLayout (new GridLayout(4,1));
container.setBackground (Color.white);
container.add(panel1);
panel1.add(test);
container.add(panel2);
container.add(panel3);
container.add(panel4);
ButtonHandler handler = new ButtonHandler ();
test.addActionListener (handler);
setVisible (true);
public static void main (String args[])
panels application = new panels ();
private class ButtonHandler implements ActionListener
public void actionPerformed (ActionEvent event)
if (event.getSource () == test)
panel1.setVisible(true);
panel2.setVisible(false);
panel3.setVisible(false);
panel4.setVisible(false);
}

Answer 1

Take a look at this example and you will see that your code is missing a few things.
http://www.javaprogrammingforums.com/java-swing-tutorials/278-how-add-actionlistener-jbutton-java-swing.html
There are plenty of examles on the web of how to do that
http://www.youtube.com/watch?v=GvTZ2Huo0T4