code: public static void transfer(InputStream in, OutputStream out) throws IOException
      {
          byte[] bytes = new byte[TRANSFER_BUFFER];
          int count;
          while ((count = in.read(bytes)) != -1)
          {
              out.write(bytes, 0, count);
          }
      }
docs: Transfers bytes from an input stream to an output stream.
  Callers of this method are responsible for closing the streams
  since they are the ones that opened the streams.