How to find Max Date in List<Object>?

Question

Consider a class User

public class User{
  int userId;
  String name;
  Date date;
}

Now I have a List

Answer 1

Comparator cmp = new Comparator() {
    @Override
    public int compare(User user1, User user2) {
        return user1.date.compareTo(user2.date);
    }
};

Collections.max(list, cmp);