var list = List.of(5, 13, 34); list.stream() .map(x -> x % 10) .peek(System.out::println) .filter(x -> x > 3) .forEach(System.out::println); List<String> animals = List.of("dog", "cat", "parrot"); animals.stream() .sorted() .peek(item -> System.out.println(item)) .map(String::length); System.out.println(animals);