Convert PNG to JPEG image file in Java

import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
 
public class ConvertImageFile {
 
   public static void main(String[] args) {
 
 BufferedImage bufferedImage;
 
 try {
 
   //read image file
   bufferedImage = ImageIO.read(new File("c:\\javanullpointer.png"));
 
   // create a blank, RGB, same width and height, and a white background
   BufferedImage newBufferedImage = new BufferedImage(bufferedImage.getWidth(),
   bufferedImage.getHeight(), BufferedImage.TYPE_INT_RGB);
   newBufferedImage.createGraphics().drawImage(bufferedImage, 0, 0, Color.WHITE, null);
 
   // write to jpeg file
   ImageIO.write(newBufferedImage, "jpg", new File("c:\\javanullpointer.jpg"));
 
   System.out.println("Done");
 
 } catch (IOException e) {
 
   e.printStackTrace();
 
 }
 
   }
 
}

Output

A new jpg file is generated, with white background.

File : javanullpointer.jpg, 9kb