What is an applet? Explain life cycle of an applet. how an image can be loaded in applet? Give example.

 An applet is a Java program that runs within a web browser. It is a special type of Java application that is designed to be embedded within a web page and can be used to add dynamic content to web pages.

The life cycle of an applet consists of four methods:

1. init(): This method is called when the applet is first loaded into memory. It is used to initialize the applet and perform any necessary setup.
2. start(): This method is called when the applet is started, either by loading the web page or by returning to it from another page. It is used to start any threads or timers that the applet requires.
3. stop(): This method is called when the applet is stopped, either by navigating away from the page or by closing the web browser. It is used to stop any threads or timers that the applet started.
4. destroy(): This method is called when the applet is about to be unloaded from memory. It is used to perform any necessary cleanup, such as closing files or network connections.

To load an image in an applet, you can use the getImage() method of the java.applet.Applet class. Here is an example:

import java.applet.*;
import java.awt.*;
public class ImageApplet extends Applet {
    private Image image;
    public void init() {
        image = getImage(getCodeBase(), "image.jpg");
    }
    public void paint(Graphics g) {
        g.drawImage(image, 0, 0, this);
    }
}

In this example, we create an applet that loads an image called "image.jpg" from the same directory as the applet. We use the getCodeBase() method to get the URL of the applet's codebase (i.e. the directory containing the applet) and pass it along with the image filename to the getImage() method.

In the paint() method, we use the drawImage() method of the Graphics class to draw the image onto the applet's surface. We pass the image, along with the x and y coordinates of where to draw it and the applet itself as the ImageObserver.

Overall, this applet demonstrates how to load and display an image in an applet using the getImage() and drawImage() methods.