How to read and write image from a file ?

Consider one has to download image and store it on the local disk .. JAva provides an easy way to do this .
URL url = new URL(urlString); // url of the http link

BufferedImage image = ImageIO.read(url);

try{

ImageIO.write(image,imageType,new File("imageName") );

}catch(Exception e ){

System.out.println("FAILED to download ");

}