Computer Science 252
Problem Solving with Java

Fall 2015, The College of Saint Rose

Home     Syllabus     Schedule     Examples     Style Guide

RandomOvalsOnClick Demo

A working demo of RandomOvalsOnClick will appear below. Click inside the applet to interact with it.

RandomOvalsOnClick BlueJ Project

Click here to download a BlueJ project for RandomOvalsOnClick.

RandomOvalsOnClick Source Code

The Java source code for RandomOvalsOnClick is below. Click on a file name to download it.

RandomOvalsOnClick.java

import objectdraw.*;

import java.awt.*;

import java.util.Random;



/**

 * FILLS A CANVAS UP WITH RANDOM COLORED DOTS AT RANDOM POINTS

 * 

 * @author DR. Sharon Gower Small

 * @version version 1.0

 * 

 * Updated by Jim Teresco, The College of Saint Rose, Fall 2013

 * 

 * $Id: RandomOvalsOnClick.java 2218 2013-10-18 14:06:39Z terescoj $

 */



public class RandomOvalsOnClick extends WindowController

{

    private static final int OVAL_DIM = 10;

    private static final int OVALS_PER_CLICK = 1000;



    // Random number generator

    private Random randomGen = new Random();

    

    /*

     * add a lot of randomly placed and colored ovals on each click

     */

    public void onMouseClick(Location point) {

        

        for (int count = 0; count < OVALS_PER_CLICK; count++) {

            FilledOval randomOval = 

                new FilledOval(randomGen.nextInt(canvas.getWidth() - OVAL_DIM),

                               randomGen.nextInt(canvas.getHeight() - OVAL_DIM),

                               OVAL_DIM,OVAL_DIM,canvas);

            randomOval.setColor(new Color(randomGen.nextInt(256),

                                          randomGen.nextInt(256),

                                          randomGen.nextInt(256)));



        }

    }

}