The Java Boutique: Step by Step Java Tutorial

Tutorials : Step by Step :
Chapter 1 :

Contents

Graphical Interface

Hello World Example

Drawing Shapes and using colors

Displaying Images

Using basic components

Layout of GUI

Drawing Shapes and using colors

/*
Applet will paint special shapes and use colors and fonts
Only new methods are explained
*/

import java.awt.*;
import java.applet.*;

public class DrawExample extends Applet
{

// Specify variables that will be needed everywhere, anytime here
// The font variable
Font bigFont;

// The colors you will use
     Color redColor;
     Color weirdColor;
     Color bgColor;

     public void init()
     {
// Here we will define the variables further
// Will use Arial as type, 16 as size and bold as style
// Italic and Plain are also available
          bigFont = new Font("Arial",Font.BOLD,16);

// Standard colors can be named like this
redColor = Color.red;

// lesser known colors can be made with R(ed)G(reen)B(lue).
weirdColor = new Color(60,60,122);

bgColor = Color.blue;

// this will set the backgroundcolor of the applet
setBackground(bgColor);

}

     public void stop()
     {
     }

// now lets draw things on screen
     public void paint(Graphics g)
     {
// tell g to use your font
      g.setFont(bigFont);
      g.drawString("Shapes and Colors",80,20);

// Now we tell g to change the color
g.setColor(redColor);

// This will draw a rectangle (xco,yco,xwidth,height);
g.drawRect(100,100,100,100);

// This will fill a rectangle
g.fillRect(110,110,80,80);

// change colors again

g.setColor(weirdColor);

// a circle (int x, int y, int width, int height,int startAngle, int arcAngle);
// ovals are also possible this way.

g.fillArc(120,120,60,60,0,360);

g.setColor(Color.yellow);

// Draw a line (int x1, int y1, int x2, int y2)

g.drawLine(140,140,160,160);

// reset the color to the standard color for the next time the applets paints
// an applet is repainted when a part wasn't visible anymore
// happens most often because of browser minimizing or scrolling.

g.setColor(Color.black);

}

// that's some basic drawing.
// next is drawing images on screen
// go to imageExample.java

Next...

Applet Index
(sorted alphabetically)
A B C D E F G H I J K
L M N O P Q R S T U
V W X Y Z #s

The Java Source
(applets w/source code)
A B C D E F G H I J K
L M N O P Q R S T U
V W X Y Z

How to Add Java Applets to Your Site

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