I need help with writing up the Java Code.

Need help writing code for java game with animation?

• i need help getting a rectangle to move side to side these are the dimensions: g.setColor(Color.BLUE); g.fillRect(397,207,25,165); i need it to move along the x axis between the points 200 and 570 where y=125 (moving pretty much on a horizontal line) not sure if i should use a thread or what..thanks

• Answer:

  you need a thread. suppose you have a: import java.awt.*; import java.applet.*; public class myApplet extends Applet { public void init ( ) { //this sets up the thread new MyThread(this).start(); } public void paint(Graphics g) { g.setColor(Color.BLUE); //the following starts the rectangle at 397, 207 with dimensions 25 x 165. //as i increases, the rectange will move. g.fillRect(397+i, 207, 25, 165); } //suppose we had a method moveRight( ) that increments i by 1 space. public void moveRight( ) { i++; //note: maybe you want if it goes off the screen to readjust itself if(397 + i >=getWidth()) { i=0; } repaint(); //this refreshes the display } private int i=0; } now we will make a MyThread class to extend Thread. we will put the applet to sleep and then wake it up and move it again. class MyThread extends Thread { public MyThread(MyApplet applet) { this.applet = applet; //stores the reference as a local variable. } public void run() { while(true) { try { Thread.sleep(1000); //this puts the applet to sleep for 1000 milliseconds = 1 sec } catch (InterruptedException e) { } applet.moveRight(); } } private MyApplet applet; }