import java.awt.image.BufferedImage;
import java.io.File;
import java.net.URL;

import javax.imageio.ImageIO;

public class ImageIOJavaExample {
    public static void main(String args[]) throws Exception{    
        URL imageURL = new URL("file:///D:/hello-world.png");
        BufferedImage bi = ImageIO.read(imageURL);
        
        ImageIO.write(bi, "jpg", new File("D:/hello-world-copy.png"));
        System.out.println("Copied!");
    }
}