判断数组是否包含某值

        //方法一：
        Integer[] arr= {1,2,3};
        List<Integer> list = Arrays.asList(arr);
        if (list.contains(1)&&list.contains(2)){
            System.out.println("1,2");
        }
        //方法二：
        String[] arr = {"a","b","c"};
        List<String> list = new ArrayList<String>();
        Collections.addAll(list, arr);
        if (list.contains("a")&&list.contains("b")){
            System.out.println("a,b");
        }