Having trouble figuring out my issue with Circle class

Question

I made another question about two weeks ago with having trouble with the Circle class. I couldn't exactly pinpoint a direct code to put on here to show you guys but no matter what I do with the Circle class, or any thing similar to it, I can't get the code to compile.

I have tried copying directly out of my textbook to see if the code provided by my teacher and the book will work, and I still get a "Cannot find symbol" whenever I try to create a Circle or Rectangle. Here's some code from my book for example

import javax.swing.JApplet;
import java.awt.Color;
import java.awt.Graphics;

public class Week8_ExtraCredit extends JApplet
{
    private int centerX = 200, centerY = 150;
    private Color toggleColor = Color.BLACK;
    private Circle circle;

    public void paint( Graphics g )
    {
        super.paint( g );

        for ( int diameter = 200; diameter >= 20; diameter -= 20 )
        {
            circle = new Circle( centerX - diameter / 2,
                                 centerY - diameter / 2,
                                 diameter, toggleColor );

            circle.draw( g );

            if ( toggleColor.equals( Color.BLACK ))
                toggleColor = Color.RED;
            else
                toggleColor = Color.BLACK;
        }
    }
}  

This code is pulled directly from my book which is supposed to create a circle of with black and red rings inside of it. But running it, I get this error

C:\Users\yardeen\Documents\JCreator LE\MyProjects\Week8_ExtraCredit\src\Week8_ExtraCredit.java:17: error: cannot find symbol
    private Circle circle;
            ^
  symbol:   class Circle
  location: class Week8_ExtraCredit

This is given for every instance the class Circle is called upon. If I could get any help as to why I'm getting this problem, that would be awesome. This has been the only thing stumping me in learning Java so far: :\

Answer 1

Assuming you didn't create a Circle class as your code and the above comments suggest, here's an alternate solution (unless you're required to create your own Circle class):

Make sure you have these imports:

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;

And then create an Ellipse:

Shape circle = new Ellipse2D.Double(x, y, width, height);

This line will replace your "circle = new Circle" line. Make sure x, y, width, and height are doubles, and if you want further information check out this .