645. 错误的集合

class Solution {
public static int[] findErrorNums(int[] nums) {

        Arrays.sort(nums);
        int dup=-1;
        int miss=1;
        for (int i = 1; i < nums.length; i++) {
            if(nums[i]==nums[i-1]){
                dup=nums[i];
            }
            if(nums[i]-nums[i-1]>1){
                miss=nums[i]-1;
            }
        }
        return new int[]{dup,nums[nums.length-1]==nums.length?miss:nums.length};
}
   
}