Moving Balls mini project using Java Applet
Write a program to develop a application in java applet which will show balls that will move across the screen .
In Moving Balls using Java Applet project we have two balls moving perpendicular to each other . Also balls have some sort of animation which will change it’s color a regular intervals . The code for this applet is simple and this code can be used as applet assignment in your academics .
Sample code for Applet Animated Balls that will move regularly across the screen :
import java.util.*; import java.applet.*; import java.awt.*; import java.awt.event.*; //Package Declarations public class balls extends Applet implements Runnable { Random r = new Random(); // Random number generation for Different Colours int x = 10, y = 10,sang1 = 0, sang2 = 0, he = 500 , wi = 500; public void init() { Thread t = new Thread(this); // Thread creation for animation t.start(); } public void run() { while(true) { try { repaint(); Thread.sleep(100); // Thread time interval set to 100 mil seconds if( x < wi - 100) // Playing with position of balls on the applet screen x += 5; if( y < he - 100) y += 5; if( x > wi - 100) x = wi - 100; if( y > he - 100) y = he - 100; sang1 += 10; sang2 += 10; } catch(Exception e) { } } } public void paint(Graphics g) { Dimension d = getSize(); he = d.height; wi = d.width; g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); // Balls random colors sets g.fillArc(x,20,100,100,sang1,90); g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); g.fillArc(x,20,100,100,sang1 + 90,90); g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); g.fillArc(x,20,100,100,sang1 + 180,90); g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); g.fillArc(x,20,100,100,sang1 + 270,90); g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); g.fillArc(10, y, 100, 100, sang2 ,90); g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); g.fillArc(10,y,100,100, sang2 + 90,90); g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); g.fillArc(10,y,100,100,sang2 + 180,90); g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); g.fillArc(10,y,100,100,sang2 + 270,90); } }
Now if you want to Change the speed of the Balls moving speed just change this Line …
repaint(); Thread.sleep(100);
Increase limit of sleep parameter for say Thread.sleep(400) to decrease speed or for increasing speed decrease parameter value .
To set the size of screen of applet just change values of he and wi in Above Code .