hashmap value값으로 정렬하는 두가지 방법

HashMap<String, Integer> playersMap = new HashMap<String, Integer>();  
List<String> keySet = new ArrayList<>(playersMap.keySet());
  //방법 1  
  keySet.sort((o1,o2) -> playersMap.get(o1).compareTo(playersMap.get(o2)));
  //방법 2
  Collections.sort(keySet, (o1,o2) -> playersMap.get(o1).compareTo(playersMap.get(o2)));