How to sort an arraylist of objects using one common property

Question

I have an arraylist of Student objects which have several properties including first and last name, gpa, UID (university ID number), and more. I am stumped on how to sort th

Answer 1

List students = // create and populate your list...
Collections.sort(students, new Comparator() {
    @Override
    pulbic int compare(Student s1, Student s2) {
        return Integer.valueOf(s1.getUid())
                .compareTo(Integer.valueOf(s2.getUid));
    }
}