list篩選出包含特定字符串的元素，元素再反轉，再去重（使用jdk8 stream）

去重可以用set，這里使用jdk8 stream去重。

例如：

    public static void main(String[] args) {
        String subStr = "a";
        List<String> list = new ArrayList<>(Arrays.asList("abc", "test", "ivy", "absent", "total", "jack", "woo", "java", "Jenkins", "docker","test","Docker"));
        List<String> tempList = new ArrayList<>();
        //篩選包含a的元素
        for (String s :list) {
            if (!s.contains(subStr)) {
                //元素反轉
                String reverse = new StringBuffer(s).reverse().toString();
                tempList.add(reverse);
            }
        }

        //去重
        List<String> result = tempList.stream().distinct().collect(Collectors.toList());
        System.out.println(result.get(0));
        System.out.println(result.get(1));
        System.out.println(result.get(2));

    }