Method test

streams/FunctionMap.java:14–20

(String descr, Function<String, String> func)

    return Arrays.stream(elements);
  }
  static void
  test(String descr, Function<String, String> func) {
    System.out.println(" ---( " + descr + " )---");
    testStream()
      .map(func)
      .forEach(System.out::println);
  }
  public static void main(String[] args) {

    test("add brackets", s -> "[" + s + "]");