Erro ao comparar 2 InputStream

private boolean isSame( InputStream input1, InputStream input2 ) throws IOException {
      //boolean error = false;
      try {
          byte[] buffer1 = new byte[1024];
          byte[] buffer2 = new byte[1024];
          try {
              int numRead1 = 0;
              int numRead2 = 0;
              while (true) {
                  numRead1 = input1.read(buffer1);
                  numRead2 = input2.read(buffer2);
                  if (numRead1 > -1) {
                      if (numRead2 != numRead1) return false;
                      // Otherwise same number of bytes read
                      if (!Arrays.equals(buffer1, buffer2)) return false;
                      // Otherwise same bytes read, so continue ...
                  } else {
                      // Nothing more in stream 1 ...
                      return numRead2 < 0;
                  }
              }
          } finally {
              //input1.close();
          }
      } catch (IOException e) {
          //error = true; // this error should be thrown, even if there is an error closing stream 2
          throw e;
      } catch (RuntimeException e) {
          //error = true; // this error should be thrown, even if there is an error closing stream 2
          throw e;
      } finally {
//          try {
//              input2.close();
//          } catch (IOException e) {
//              if (!error) throw e;
//          }
      }
  }

InputStream in = conn.getInputStream();
                        InputStream inOld = new FileInputStream(fileOld);

                        //InputStream inCopia = in;
                        //InputStream inOldCopia = inOld;

                        if(isSame(in, inOld)){
                            System.out.println("mesmo");
                        }

			int i=0;
			while ((i = in.read()) != -1){
				out.write(i);
			}
			in.close();
			out.close();
			System.out.println("Gravação efetuada com sucesso");