[java] System.out::println, method reference

code

List<String> list = new ArrayList<>();
list.add("aa");
list.add("bb");
list.add("cc");

System.out.println("---1");
for (String str : list) {
    System.out.println(str);
}

System.out.println("---2");
list.forEach(s -> System.out.println(s));

System.out.println("---3");
list.forEach(System.out::println);

console

---1
aa
bb
cc
---2
aa
bb
cc
---3
aa
bb
cc