Is there a error with this code

Question

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class ClickMe extends Applet implements MouseListener {
private Spot spot = null;
private static final int RADIUS = 7;
public void init() {
addMouseListener(this);
public void paint(Graphics g) {
//draw a black border and a white background
g.setColor(Color.white);
g.fillRect(0, 0, getSize().width - 1, getSize().height - 1);
g.setColor(Color.black);
g.drawRect(0, 0, getSize().width - 1, getSize().height - 1);
//draw the spot
g.setColor(Color.red);
if (spot != null) {
g.fillOval(spot.x - RADIUS, spot.y - RADIUS, RADIUS * 2, RADIUS * 2);
public void mousePressed(MouseEvent event) {
if (spot == null) {
spot = new Spot(RADIUS);
spot.x = event.getX();
spot.y = event.getY();
repaint();
public void mouseClicked(MouseEvent event) {}
public void mouseReleased(MouseEvent event) {}
public void mouseEntered(MouseEvent event) {}
public void mouseExited(MouseEvent event) {}
When I compile the the code I get a "cannot resolve symbol"
private Spot spot = null;
spot = new Spot(RADIUS);
I don't know if these are errors in the code

Answer 1

'cannot resolve symbol' errors usually mean a problem with the declarations and initialisations at the start of your class. This is specifically to do with your line private Spot spot = null;
i haven`t much time to look at your code, but i would suggest getting rid of the null initialisation here, and do you ever actually change this value? after a quick look it seems that you only query it to see if the variable spot is null. if you never affect this value, then it will always be null and only one if statement will ever be executed.
but as i said i haven`t any time, so could be off here
boutye - boss is coming bak argh!