java Collections.sort排序处理

        List<User> list = new ArrayList<>();
        list.add(new User(15, "小明"));
        list.add(new User(18, "小红"));
        list.add(new User(11, "小绿"));
        
        //匿名实现Comparator接口进行排序
        Collections.sort(list, new Comparator<User>() {
            @Override
            public int compare(User o1, User o2) {
                return o1.getAge().compareTo(o2.getAge());
            }
        });
        
        //lambda表达式
        Collections.sort(list,(User o1, User o2)->{
            return o1.getAge().compareTo(o2.getAge());
        });
        list.forEach(System.out::println);