[ShoeNinja]

You are not creating a rectangle object. When you try to define width, there is no object there.

Code:

public class DrawRec {
    public static void main(String[] args) {
        Rectangle myRect = new Rectanle();
        myRect.width = 40;
        myRect.height = 50;
        System.out.println("myRect's area is " + myRect.area());
    }
}