How to find the biggest VALUE (not a key) in a HashMap?

How to find the five?

HashMap<Integer, Integer> hmap = new HashMap<Integer, Integer>();
hmap.put(98, 3);
hmap.put(-120, 2);
hmap.put(12, 5);
hmap.put(344, 1);
hmap.put(-220, 1);

I tried this but it doesn’t like my hmap.

System.out.println(Collections.max(hmap));

Collections.max(hmap.values());