Lambda实战案例(一)

集合遍历

    public static void main(String[] args) {
        ArrayList<String> strings = new ArrayList<>();
        strings.add("1");
        strings.add("2");
        strings.add("3");
//        strings.forEach(new Consumer() {
//            @Override
//            public void accept(Object o) {
//                System.out.println("o:" + o);
//            }
//        });
        strings.forEach((s) -> {
            System.out.println(s);
        });

    }

集合排序

    public static void main(String[] args) {
        ArrayList<UserEntity> userlists = new ArrayList<>();
        userlists.add(new UserEntity("mayikt", 22));
        userlists.add(new UserEntity("xiaomin", 18));
        userlists.add(new UserEntity("xiaoha", 36));
        userlists.sort(new Comparator<UserEntity>() {
            @Override
            public int compare(UserEntity o1, UserEntity o2) {
                return o1.getAge() - o2.getAge();
            }
        });
        userlists.sort((o1, o2) -> o1.getAge() - o2.getAge());
    }