code: public static String[] tokenize(String str, String delimiters, boolean trim) {
          if (str == null) {
              return new String[0];
          }
          StringTokenizer st = new StringTokenizer(str, delimiters);
          List<String> tokens = new ArrayList<>();
          while (st.hasMoreTokens()) {
              tokens.add(trim ? st.nextToken().trim() : st.nextToken());
          }
          return tokens.toArray(new String[0]);
      }
docs: Tokenize the given {@code String} into a {@code String} array via a {@code StringTokenizer}.
  
  @param str the String to tokenize
  @param delimiters the delimiter characters
  @param trim trim the tokens via String's trim
  @return an array of the tokens