code: public static void noSpace(String string) throws JSONException {
      int i, length = string.length();
      if (length == 0) {
        throw new JSONException("Empty string.");
      }
      for (i = 0; i < length; i += 1) {
        if (Character.isWhitespace(string.charAt(i))) {
          throw new JSONException("'" + string + "' contains a space character.");
        }
      }
    }
docs: Throw an exception if the string contains whitespace. Whitespace is not allowed in tagNames and attributes.
  
  @param string
  @throws JSONException