Drawing Basic Rectangles Using Java

DarkDivinity · January 11, 2008

I posted on another forums... But not allowed to post links

In this tut ill show you how to draw two basic rectangles with Java.

First we start with out imports:

import java.awt.*;import java.applet.Applet;//tells the browser its an applet lol

Now we start with the class:

public class Rectangles extends Applet	   {

And then the voids:

public void paint(Graphics g) //you will always need Graphics g so the applet knows its a drawing			  {			  int left = 5;			  int top = 5;			  int width = (this.size().width) / 2 - 10; //the width of the rectangles			  int height = this.size().height - 10; //the height of the rectangles			  drawRects(g, left, top, width, height); //obvious what it does			  left = width + 15;			  drawFilledRects(g, left ,top, width, height); //filles the recangles			  }	   public void drawRects(Graphics g, int l, int t, int w, int h)			  {			  while (h > 0)					{					g.drawRect(l, t, w, h);					l += 10; //length					t += 10; //idk lol					w -= 20; //width					h -= 20; //height					}			  }public void drawFilledRects(Graphics g, int l, int t, int w, int h)	   {			  g.setColor(Color.black); //the colour it sets - try green etc			  while (h > 0)					{					g.fillRect(l, t, w, h);					l += 10; //length					t += 10;					w -= 20; //width					h -= 20; //height					if (g.getColor() == Color.white) //the other colour etc					   g.setColor(Color.black);					else					   g.setColor(Color.white);					}		  }}

Now you need the HTML code to run it in your browser

<HTML>
<HEAD>
<TITLE>Rectangles</TITLE>
</HEAD>
<BODY>
<H1>A test page for my Java applet<BR>
</H1>
<P>
This is the output from a Java applet:<BR>
<BR>
<APPLET CODE="Rectangles.class" WIDTH=150 HEIGHT=50>
</APPLET>
</BODY>
</HTML>

Now make sure you name the java file Rectangles.java!
This is what I learned from my java book (with JDK v 1.1)
Also Read the comments I have added to help you out!

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Drawing Basic Rectangles Using Java

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