Computer Science 120
Introduction to Programming
Spring 2011, Siena College
NudgeBall Demo
A working demo of NudgeBall will appear below. Click inside the applet to interact with it.
NudgeBall BlueJ Project
Click here to download a BlueJ project for NudgeBall.
NudgeBall Source Code
The Java source code for NudgeBall is below. Click on a file name to download it.
import objectdraw.*; import java.awt.*; /* * Example NudgeBall: draw a ball on the screen and move it * to the right each time the mouse is clicked on the ball. * * Jim Teresco, Siena College, CSCI 120, Spring 2011 * * $Id: NudgeBall.java 1501 2011-01-24 20:48:50Z terescoj $ */ public class NudgeBall extends WindowController { // a constant defining the size of the ball private static final int BALL_DIAMETER = 50; // a constant defining the initial location of the ball private static final Location BALL_POSITION = new Location(100, 100); // a constant defining how far to move the ball when clicked private static final int BALL_MOVE = 10; // the ball we will be moving private FilledOval ball; public void begin() { ball = new FilledOval(BALL_POSITION, BALL_DIAMETER, BALL_DIAMETER, canvas); } /* Move the ball to the right if we clicked on it */ public void onMouseClick(Location point) { if (ball.contains(point)) ball.move(BALL_MOVE, 0); } }