去除数组中重复的元素 含自己(java)

Question

求一个和list 去重很像的算法实现 将一个list中 重复的数据 全部删掉, 是全部删掉, 只要重复了, 就删掉包括自己 如:
     * ["aa","aa","bb","dd","ee","ee"] 处理后返回 ["bb","dd"]

Answer 1

 public class Check {
    public static void main(String[] args) {
        List<String> list = Arrays.asList(new String[]{"aa", "aa", "bb", "dd", "ee", "ee"});
        System.out.println(check(list));
    }

    private static List<String> check(List<String> list) {
        Map<String, Integer> map = new HashMap<>();
        for (String s : list) {
            if (map.get(s) == null) {
                map.put(s, 1);
            } else {
                map.put(s, map.get(s) + 1);
            }
        }
        List<String> resultList = new ArrayList<>();
        for (String key : map.keySet()) {
            if (map.get(key) == 1) {
                resultList.add(key);
            }
        }
        return resultList;
    }
}