/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
class University implements Serializable {
    private List<Student> values = new ArrayList<Student>();
 
    public static final class Student implements Serializable {
        private int id;
        private String name;
        private String location;
        private Date date;
 
        public String getName() { return name; }
        public int getId() { return id; }
 
        Student(int id, String name, String location, Date date) {
            this.id = id;
            this.name = name;
            this.location = location;
            this.date = date;
        }
 
        // Problem occurs even with getters!!
}
}
 
class Invoker implements Serializable {
    public static void main(String[] args) {
        List<University.Student> students = new ArrayList<>();
 
        Map<String, Integer> locationOrder = students.stream().collect(HashMap::new,
                (m, s) -> m.putIfAbsent(s.getName(), m.size()),
                (m1, m2) -> m2.keySet().forEach(l -> m1.putIfAbsent(l, m1.size())));
 
        students.sort(Comparator.comparingInt((University.Student s) -> locationOrder.get(s.getName())).thenComparing(s -> s.getId()));        
    }
}
 

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