448.找到所有数组中消失的数字

class Solution {
    public List<Integer> findDisappearedNumbers(int[] nums) {
        int[] temp = new int[nums.length+1];
        for (int i = 0; i < nums.length; i++) {
            temp[nums[i]]++;
        }
        ArrayList<Integer> list = new ArrayList<>();
        for (int i = 1; i < temp.length; i++) {
            if(temp[i]==0) list.add(i);
        }
        return list;
    }
}