import java.io.File;  import java.io.IOException;  import java.util.Iterator;    import javax.imageio.ImageIO;  import javax.imageio.ImageReader;  import javax.imageio.stream.ImageInputStream;    public class DetermineFormatOfAnImage {        public static void main(String[] args) throws IOException {            // get image format in a file          File file = new File("newimage.jpg");            // create an image input stream from the specified file          ImageInputStream iis = ImageIO.createImageInputStream(file);            // get all currently registered readers that recognize the image format          Iterator<ImageReader> iter = ImageIO.getImageReaders(iis);            if (!iter.hasNext()) {              throw new RuntimeException("No readers found!");          }            // get the first reader          ImageReader reader = iter.next();            System.out.println("Format: " + reader.getFormatName());            // close stream          iis.close();        }    }