如何获取HashMap中的3个最高值？

import java.util.*;

public class Main {
    public static void main(String[] args) {
        HashMap<String, Integer> hashMap = new HashMap<>();
        hashMap.put("A", 10);
        hashMap.put("B", 20);
        hashMap.put("C", 30);
        hashMap.put("D", 40);
        hashMap.put("E", 50);

        List<Integer> values = new ArrayList<>(hashMap.values());
        Collections.sort(values, Collections.reverseOrder());

        List<Integer> topThreeValues;
        if (values.size() < 3) {
            topThreeValues = values;
        } else {
            topThreeValues = values.subList(0, 3);
        }

        System.out.println("Top three values: " + topThreeValues);
    }
}