Display image in Applet

• Loading the image : The applet must first be loaded with the image file before continuing. This is typically done by invoking the init() method, which is called when the applet is first loaded. The getImage() method, which takes the URL of the image as input and returns an Image object, can be used to load an image. A "image.jpg" image file loaded from the applet's directory can be seen in the below example.
  

  public void init() {
      Image img = getImage(getCodeBase(), "image.jpg");
  }
  








• Drawing the image : The java.awt.Graphics class can be used to draw the image on the applet after it has been loaded. This is usually done using the paint() method, which is called whenever the applet needs to be redraw. You can draw an image by passing an Image object, the x and y coordinates of where it should be drawn, and the applet itself to the Graphics class's drawImage() method. Here is an example applet that demonstrates how to draw an image.
  

  public void paint(Graphics g) {
      Image img = getImage(getCodeBase(), "image.jpg");
      g.drawImage(img, 0, 0, this);
  }
  

  
  

  In this case, the applet itself, the Image object, and the x and y coordinates of (0, 0) are passed as parameters to the drawImage() method. This will cause the applet's top-left image to be drawn.



• Handling errors : Loading an image from a distant server can take some time, and there is a chance that something could go wrong. To handle errors and catch any exceptions that might be thrown during image loading, use a try-catch block. Here is an example of loading an image and handling any possible exceptions.
  
  
  
  
  
  

  public void init() {
      try {
          Image img = getImage(new URL("http://example.com/image.jpg"));
      } catch (Exception e) {
          e.printStackTrace();
      }
  }
  

  
  

  The drawImage() method in this case receives as parameters the applet itself, the Image object, and the (0, 0) x and y coordinates. This will cause the applet's top-left image to be drawn.

  
  

  It's crucial to keep in mind that images should load asynchronously in the init() method to avoid interrupting the applet's user interface. Use methods like getImage(), which load the image in the background and return right away, in order to achieve this. The handling of any exceptions that might be thrown when loading the image is something else you should remember to do.

how to display an image in an applet

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

public class ImageApplet extends Applet {
  Image img;

  public void init() {
    img = getImage(getCodeBase(), "image.jpg");
  }

  public void paint(Graphics g) {
    g.drawImage(img, 0, 0, this);
  }
}