How to get 5 highest values from a hashmap?

Question

I have a Hashmap that links a zipcodes stored as keys and population stored as values in a hashmap.

The hashmap contains around 33k entries.

I\'m trying to get t

Answer 1

public class CheckHighiestValue { public static void main(String... s) {

    HashMap map = new HashMap();

    map.put("first", 10000);
    map.put("second", 20000);
    map.put("third", 300);
    map.put("fourth", 800012);
    map.put("fifth", 5000);
    map.put("sixth", 30012);
    map.put("seventh", 1234);
    map.put("eighth", 45321);
    map.put("nineth", 5678);

    Set> set = map.entrySet();

    List> list = new ArrayList>(
            set);

    Collections.sort(list, new Comparator>() {

        @Override
        public int compare(Entry o1,
                Entry o2) {

            return o2.getValue().compareTo(o1.getValue());
        }

    });
    System.out.println(list.subList(0, 5));
}

}