Java int[] 数组 转化为 List

        
        int[] num = new int[] {1,2,3,4,5,6,7};
        List<Integer> intList = IntStream.of(num).boxed().collect(Collectors.toList());
        // 获得 intList 前四位数据
        List newList = intList.subList(0,4);
        return newList;