code: public static String journalIdBytesToString(byte[] jid) {
      char[] charArray = new char[jid.length];
      for (int i = 0; i < jid.length; i++) {
        charArray[i] = (char) jid[i];
      }
      return new String(charArray, 0, charArray.length);
    }
docs: Translates byte[] journal id into String. This will be done only the first
  time we are accessing a journal.