File Input Output Java

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class Util{
    public static void copyInputstreamToFile (InputStream in, OutputStream out) {
        try {
            byte[] buf = new byte[1024];
            int len;
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
            in.close();
            out.close();
        } catch (IOException ex) {
           
        }
    }
}