Java 8 ストリームを使用して属性ごとにオブジェクトをグループ化するにはどうすればよいですか?

import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.stream.Collectors;

public class Grouping {
    public static void main(String[] args) {

        List<Student> studlist = new ArrayList<>();
        studlist.add(new Student("1726", "John", "New York"));
        studlist.add(new Student("4321", "Max", "California"));
        studlist.add(new Student("2234", "Andrew", "Los Angeles"));
        studlist.add(new Student("5223", "Michael", "New York"));
        studlist.add(new Student("7765", "Sam", "California"));
        studlist.add(new Student("3442", "Mark", "New York"));

        Map<String, List<Student>> studlistGrouped =
            studlist.stream().collect(Collectors.groupingBy(w -> w.stud_location));
    }
}

class Student {
    String stud_id;
    String stud_name;
    String stud_location;

    Student(String sid, String sname, String slocation) {
        this.stud_id = sid;
        this.stud_name = sname;
        this.stud_location = slocation;
    }
}