There and error in 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'm new to programming and I don't know if these are errors in the code

Answer 1

The compiler doesn't know what "Spot" is. It isn't in any of the packages you imported (java.awt.*, etc), so I'm assuming it's another class you wrote. At compile time, the compiler must be able to find that class, so it's looking for a file named Spot.class in your CLASSPATH. I think you just have a simple classpath problem that all beginners run into. If you don't have a Spot class, then it's a different problem. Maybe you meant to declare the "spot" variable as a different thing?