code: public static String toCamelCase(String word)
    {
      if(word == null) {
        return null;
      }
      if(word.isEmpty()) {
        return "";
      }
      return Character.toUpperCase(word.charAt(0)) + word.substring(1).toLowerCase();
    }
docs: Convert word to camel case. This method convert a single word to English convention title case, that is, first
  letter to upper case and the rest to lower. Note that this method may have not reasonable results if more words,
  perhaps space separated, are given; it simply convert all but the first to lower case. Use
  {@link #toMemberName(String)} or {@link #toTitleCase(String)} if need to convert more words.
  <p>
  Returns null if word argument is null and empty if empty.
  
  @param word word to convert.
  @return given word as title case, null or empty string.