Drawing a bullsEye to the screen.

Code:
//Exercise P4.6 - by Brandon Milton

/*

 * This bullseye code is made by Brandon Milton, known as brandonio21 on BP Forums

 * This exercise is directly from Cay Horstman's: Computing Concepts with Java Essentials

 * 

 *   Commenting is for better understanding

 * 

 * Feel free to use

 * http://brandonsoft.com

 * http://bpforums.info

 */



import java.awt.Color; 

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.applet.Applet;

import java.awt.geom.Ellipse2D;

public class bullsEye extends Applet { //Tell Java that this is indeed an applet

    

    public void paint(Graphics g){ //This is what java needs to actually draw something

        Graphics2D g2 = (Graphics2D)g; //Tell java to use the newer graphics2d

        

        int rings = 8; //THIS CAN BE EDITED - This is the number of rings that the bullseye itself has. default is '8'

        

        int i = rings*50; //multiply the number of rings by 50, to get the largest rings width

        while (i > 0){ //As long as the width is not 0,

            Ellipse2D.Double elip = new Ellipse2D.Double(400 - (i/2),400 - (i/2),i,i); //Create a new circle, it's position is in the center of the previous ring, and it's size is the previous rings - 50

            if ((i/50 %2) == 0){ //If it is an even ring

                g2.setColor(Color.red);

                g2.draw(elip);

                g2.fill(elip);

                

            } else{ //It is an odd ring

                g2.setColor(Color.white);

                g2.draw(elip);

                g2.fill(elip);

            }

            i = i -50; //Decrease the size, and draw another ring

            

        }

    }



}