Applets in Java

Applet is a Java program embedded within HTML pages. Java applets is compatible with almost all the web browsers like Mozilla Firefox, Google Chrome, Internet explorer, Netscape navigator and others that are java enabled. Applets make a website more dynamic and are secure.

Applet is designed to run remotely on the client browser. They cannot access system resources on local computer. They are often used for a small internet and intranet applications.

Following example will show how to develop an applet code that displays Hello World message and run it in the browser.

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class HelloWorldApplet extends Applet{
  public static void main(String[] args){
  Frame frame = new Frame("Roseindia.net");
  frame.setSize(400,200);
  Applet app = new HelloWorldApplet();
  frame.add(app);
  frame.setVisible(true);
  frame.addWindowListener(new WindowAdapter(){
  public void windowClosing(WindowEvent e){
  System.exit(0);
  }
  });
  }
  public void paint(Graphics g){
  g.drawString("Hello World!",200,100);
  }
}

Here is the HTML code required to Run an applet in web browser:

<html>
<head>
<title>A Simple Applet program</title>
</head>
<body>
<APPLET CODE="HelloWorldApplet.class" WIDTH=700 HEIGHT=500>
</APPLET>
</body>
</html>

The Applet tag in html is used to embed an applet in the web page.

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