First Applet Tutorial

Applets

Java on the Web

Open Kawa and save this program to your diskette and compile it.

// FirstApplet.java Arnow&Weiss p.85

// Needs an html file to run this or any applet

import java.awt.*; //java abstract window toolkit
import java.applet.*; //to make applets
public class FirstApplet extends Applet {
public void paint(Graphics g){ //almost everybody calls it g
g.drawString("This is everyone's first applet.",20,20);
}
}

Now save this HTML program to your diskette

<HTML>
<HEAD>
<TITLE>First Applet</TITLE>
</HEAD>
<BODY>
<APPLET CODE="FirstApplet.class" WIDTH=300 HEIGHT=60>
</APPLET>
</BODY>
</HTML>

Run the HTML program.

Where does the output appear?
How big is the box?
Stop the Run

From your web browser file menu open your html file.

Where does the output appear?
How big is the box?
Stop this run by pushing the BACK button on your browser

Other neat drawing facilities

fillOval(x1,y1,wd,ht); //use in Paint routine

fillRect same parameters as above

drawOval .

drawRect .

drawLine (x1,y1,wd,ht);

Color c =new Color (amt red(0-255), green, blue);

setColor (c)

Sample

// Shapes.java

// Needs an html file to run this or any applet

import java.awt.*; //java abstract window toolkit
import java.applet.*; //to make applets
public class Shapes extends Applet {
public void paint(Graphics g){ //almost everybody calls it g
g.drawString("This is an applet using shapes.",20,20);

       // Set the line color
       Color c =new Color (100, 10, 100); //rgb
       g.setColor (c);

       //Set the font
       Font f;
       f = new Font("Helvetica",Font.ITALIC, 24);
       g. setFont(f);
       g.drawString("First Color",20,90);

       //Draw Oval
       g.drawOval (40,20,60,35); //(x,y,wd,ht)
       c =new Color (10, 100, 100); //rgb
       g.setColor (c);
       g.fillOval (45,25,50,25);

       c= new Color(255,0,0); // all red
       g.setColor(c);
       g.fillRect(140,60,45,30);
     }
}

Do something neat!
Documentation for Graphics class: