Method main

streams/FunctionMap.java:21–37

(String[] args)

      .forEach(System.out::println);
  }
  public static void main(String[] args) {

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

    test("Increment", s -> {
      try {
        return Integer.parseInt(s) + 1 + "";
      } catch(NumberFormatException e) {
        return s;
      }
    });

    test("Replace", s -> s.replace("2", "9"));

    test("Take last digit", s -> s.length() > 0 ?
      s.charAt(s.length() - 1) + "" : s);
  }
}
/* Output:
 ---( add brackets )---