A simple Java program demonstrating how to read and write Images to a file ?

Program to demonstrate how to read and write Image to a file in Java

package com.hubberspot.example;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;

public class ReadWriteImageDemo {

   public static void main(String[] args) {
 ReadWriteImageDemo demo = new ReadWriteImageDemo();
 demo.imageProcessing();
   }

   public void imageProcessing(){
 try {

 // url of the image is wrapped in URL Object
 URL url = new URL("http://1.bp.blogspot.com/-YUR1RgiOqW0/" +
 "UC1UBYT7zZI/AAAAAAAAAeo/g34uyKSvTBI/s1600/Robot+keypress+event.jpg");
   
        // BufferedImage ref variable holds the image read at specified URL 
 // by the ImageIO class through its static method read() 
   
 BufferedImage imageUrl = ImageIO.read(url);
   
 // BufferedImage ref variable holds the image read at specified File
 // by the ImageIO class through its static method read()
   
 BufferedImage image = ImageIO.read(new File("out.gif"));
           
 // ImageIO's class static method takes RenderedImage ,
        // formatName, File and creates or transfer rendered image to 
 // File Object 
 
 ImageIO.write(imageUrl, "gif",new File("outUrl.gif"));
 ImageIO.write(image, "gif",new File("url.jpg"));


        } catch (IOException e) {
  e.printStackTrace();
 }


    }
}

Output of the program :

After reading Images from url and file system, ImageIO write method will create two image files with the name as : outUrl.jpg and url.jpg. There must be internet connection so that image at Url can be fetched successfully.