Computer Science 120
Introduction to Programming
Spring 2012, Siena College
SunAndMoon Demo
A working demo of SunAndMoon will appear below. Click inside the applet to interact with it.
SunAndMoon BlueJ Project
Click here to download a BlueJ project for SunAndMoon.
SunAndMoon Source Code
The Java source code for SunAndMoon is below. Click on a file name to download it.
import objectdraw.*;
import java.awt.*;
/*
* A program to animate the rising and setting of the sun and moon.
*
* Example from Computer Science 134, Williams College
*
* $Id: SunAndMoon.java 1487 2011-01-13 21:20:10Z terescoj $
*/
public class SunAndMoon extends WindowController {
private FilledRect field; // lower 1/3rd of window
private FilledRect sky; // top 2/3rds of window
private FilledOval heavenlyBody; // the sun or the moon
/*
* Create the sky, field and orb and set their colors
*/
public void begin() {
sky = new FilledRect(0, 0, 400, 260, canvas);
heavenlyBody = new FilledOval(100, 0, 80, 80, canvas);
field = new FilledRect(0, 260, 400, 140, canvas);
sky.setColor(Color.blue);
field.setColor(Color.green);
heavenlyBody.setColor(Color.yellow);
}
/*
* Make it look like night by using black, white and gray
*/
public void onMousePress(Location point) {
sky.setColor(Color.black);
field.setColor(Color.gray);
heavenlyBody.setColor(Color.white);
}
/*
* Make it look like a bright sunny day
*/
public void onMouseRelease(Location point) {
sky.setColor(Color.blue);
field.setColor(Color.green);
heavenlyBody.setColor(Color.yellow);
}
/*
* Move the sun-like circle down a little bit
*/
public void onMouseMove(Location point) {
heavenlyBody.move(0, 1.5);
}
/*
* Move the moon-like circle up a bit
*/
public void onMouseDrag(Location point) {
heavenlyBody.move(0, -1.5);
}
}