code: @SuppressLint("DefaultLocale")
      private static String toLowerCaseFirstOne(String string) {
          int length = string.length();
  
          if (length == 0 || Character.isLowerCase(string.charAt(0))) {
              return string;
          } else if (length == 1) {
              return string.toLowerCase();
          } else {
              return (new StringBuilder())
                      .append(Character.toLowerCase(string.charAt(0)))
                      .append(string.substring(1)).toString();
          }
      }
docs: Change string first char to lower case
  
  @param string wait change string
  @return new first lower case string