ArrayList<Integer> list = new ArrayList<>();
        for (Integer aByte : bytes) {
            list.add(aByte + 3);
        }
=
        ArrayList<Integer> list = bytes.stream().map(aByte -> aByte + 3).collect(Collectors.toCollection(ArrayList::new));    //java 8

for (Integer integer : output)
        {
            System.out.println(integer);
        }
=
output.forEach(System.out::println);