Button / actionlistener help

Question

Hi,
I'm slowly writing a applet, that when you press a button(a.k.a btnOn), it gets replaced with another button (a.k.a btnOff) and vice versa. I would appreciate any help that anyone would give. This is part of a game that i am trying to make, with very little success. So any help would be appreciated. Thanks.
p.s. i know this is probably a really easy question, but for some reason i just can't figure it out.
thanks

Answer 1

Well i tried to change michael's code, i don't know if i did it right though... i probably didn't
but here you go:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
* Class l0gixGame - write a description of the class here
* @author (your name)
* @version (a version number)
public class logixGame extends JApplet implements ActionListener {
    JButton btnOn,btnOff;
    private static final ImageIcon image[]={
        new ImageIcon("On.png"),
        new ImageIcon("Off.png")};
   public void init(){
       /** creates the control panel, sets the size,locaiton and the background
        * colour
       JPanel controlPanel = new JPanel();
       controlPanel.setSize(new Dimension(400,275));
       controlPanel.setLocation(10,100);
       controlPanel.setBackground(Color.gray);
       /** creates the background panel, sets the size,locaiton and the
       * background color
       JPanel backGround = new JPanel();
       backGround.setSize(new Dimension(400,400));
       backGround.setLocation(0,0);
       backGround.setBackground(Color.gray);
       /** creates the play panel, sets the size,locaiton and the
       * background color
       JPanel playPanel = new JPanel();
       playPanel.setSize(new Dimension(400,275));
       playPanel.setLocation(500,200);
       playPanel.setBackground(Color.orange);
       /** creates the layout for the play panel, and the control panel
        * creates the content pane, and the three panels to the content pane
        * and sets the dimensions for the content pane
       controlPanel.setLayout(new GridLayout(8,12));
       playPanel.setLayout(new GridLayout(8,12));
       Container cp = getContentPane();
       cp.setSize(new Dimension(5000,5000));
       cp.add(controlPanel);
       cp.add(playPanel);
       cp.add(backGround);
       /**initialize the onbutton and the offbutton with the related graphics*/
       ImageIcon on = new ImageIcon(getImage(getCodeBase(),
       "On.png"));
       ImageIcon off = new ImageIcon(getImage(getCodeBase(),
       "Off.png"));
       ArrayList<String> control = new ArrayList<String>();
       ArrayList<String> play = new ArrayList<String>();
       /** Randimization of control panel and play panel*/
       /**1=off 2=on*/
       int row,column,i,x,y;
         for( column = 0; column <= 8; column = column+1)
                for (row = 0; row <= 14; row = row+1)
                    i = 1;
                    y = row * 50;
                    x = column * 50;
                    if ( (column % 2) == (row % 2) )
                        Random r = new Random();
                        int n = r.nextInt();
                        if(n % 2 == 0){
                             JLabel btn2 = new JLabel(off);
                            controlPanel.add(btn2);
                            control.add("1");
                            JButton btnOn = new JButton(on);
                            btnOn.setBackground(Color.orange);
                            playPanel.add(btnOn);
                            play.add("2");
                        else{
                            JLabel btn2 = new JLabel(on);
                            controlPanel.add(btn2);
                            control.add("2");
                            JButton btnOff = new JButton(off);
                            btnOff.setBackground(Color.orange);
                            playPanel.add(btnOff);
                            play.add("1");
                    else
                        Random r = new Random();
                        int n = r.nextInt();
                        if(n % 3 == 0){
                            JLabel btn2 = new JLabel(on);
                            controlPanel.add(btn2);
                            control.add("2");
                            JButton btnOn = new JButton(on);
                            btnOn.setBackground(Color.orange);
                            playPanel.add(btnOn);
                            play.add("2");
            String controlString =""+ control;
            String playString =""+ play;
            if(controlString.compareTo(playString)==0){
                JLabel winner = new JLabel("Winner!");
                backGround.add(winner);
public void actionPerformed (ActionEvent event) {
   if(btn.getIcon().equals(on))
       btn.setIcon(off);
    else
        btn.setIcon(on);
}what is the difference between your way of getting the image and mine???
3) for the moment, i don't really care, i just want to get the individual buttons working, and test out my strategy for winning, even though i am on a time restraint, i think it would be better to hand it in with individual buttons working, then none of the buttons working...
right know i get a "cannot find symbol -- variable on" in my actionlistener is there a specific reason???
thanks for the help i do really really appreciate it..... you don't know how much..
p.s. i told you i wasn't very good at this