Java Applet Basics


An applet is a small Java program that is intended to be run within a web browser. Applets are used to provide interactive content on websites, such as games and animations.

To create an applet, you need to do the following:

  1. Create a new class that extends the java.applet.Applet class.
  2. Override the init(), start(), and paint() methods of the Applet class.

Here is an example of a simple applet that displays a message on the screen:

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

public class HelloApplet extends Applet {
    public void init() {
        // initialize the applet

    public void start() {
        // start the applet

    public void paint(Graphics g) {
        g.drawString("Hello, World!", 50, 25);

To run the applet, you will need to create an HTML page that includes the applet. Here is an example of an HTML page that displays the above applet:

    <applet code="HelloApplet" width="300" height="300"></applet>

To view the applet, you can open the HTML page in a web browser that supports Java applets.

For more information on applets in Java, you can refer to the official Java documentation at