School project

Question

I am having some trouble with this program. The goal of the program is to make a checkerboard. It keeps saying draw(java.awt.Shape) in java.awt.Graphics2D cannot be applied to (CheckerBoard) pen.draw(bask); and is also giving me an instantiationexception error during runtime. I have no idea how to fix the instantiationexception error can anyone help.
import java.applet.Applet;
import java.awt.Rectangle;
import java.awt.Graphics;
import java.awt.Graphics2D;
public class CheckerBoard extends Applet{
public void paint(Graphics g) {
Graphics2D pen = (Graphics2D) g;
     final int NSQUARES = 8;
     int size = Math.min(getWidth(), getHeight()) / NSQUARES;
     CheckerBoard bask = new CheckerBoard(NSQUARES, size);
          pen.draw(bask);
for (int i = 0; i < numSquares; i++){
for (int j = 0; j < numSquares; j++) {
          int inj = (i + j) % 2;
if (inj == 0)
Rectangle r = new Rectangle(i * size, j * size, size, size);
pen.draw(r);
public CheckerBoard(int aNumSquares, int aSize){
     numSquares = aNumSquares;
size = aSize;
int numSquares;
int size;
}

Answer 1

draw(java.awt.Shape) in java.awt.Graphics2D cannot be applied to (CheckerBoard)
pen.draw(bask);The compiler message is saying that your pen is a Graphics2D, bask is a CheckerBoard (a sort of Applet) and a Grapics2D does not know how to draw a CheckerBoard.
You can get a look at all the things a Graphics2D can do by looking at the API documentation: http://java.sun.com/javase/6/docs/api/java/awt/Graphics2D.html
So you should take that line out - or if you meant it to do something, describe that.
(It's a good idea to post your code here using the "code" tags. Put [code] at the start of your code and [/code] at the end - including the square brackets. It is also a good idea to use spaces, rather than tabs, to indent code. And to copy and paste actual code and complete error/compiler messages.)