code: static String capitalizeFirstCharOfString(final String input) {
          if (input == null || input.length() == 0) {
              return "";
          }
          else if (input.length() == 1) {
              return input.toUpperCase();
          }
          else {
              return input.substring(0, 1).toUpperCase() + input.substring(1);
          }
      }
docs: Capitalizes first char of an input string.
  
  @param input the string to be processed;
  @return The input string with the first capitalized char. Returns empty string, if passed input String is null or empty.