java Map을 활용한 sort 정렬

key 값으로 정렬하기

Map<Integer, String> your_map = new HashMap<>();

Map<Integer, your_map = new HashMap<>();
your_ArrayList = new ArrayList<Integer>();

your_map.put(1, "a");
your_map.put(3, "c");
your_map.put(5, "e");


List<Integer> keyList = new ArrayList<>(your_map.keySet());

    keyList.sort(Integer::compareTo);
    for (int key : keyList) {
        System.out.println("key: " + key + ", value: " + your_map.get(key));
    }