code: private static boolean isWhiteSpace(final char ch) {
          if (ch == CHAR_SPACE) return true;
          if (ch == CHAR_TAB) return true;
          if (ch == CHAR_NEW_LINE) return true;
          if (ch == CHAR_VERTICAL_TAB) return true;
          if (ch == CHAR_CARRIAGE_RETURN) return true;
          if (ch == CHAR_FORM_FEED) return true;
          return false;
      }
docs: Tests a char to see if is it whitespace.
  This method considers the same characters to be white
  space as the Pattern class does when matching \s
  
  @param ch the character to be tested
  @return true if the character is white  space, false otherwise.