删除数组重复项

class Solution {
    public int removeDuplicates(int[] nums) {
     int length = nums.length - 1;
        for (int i = 0; i <= length; i++) {
            for (int j = i + 1; j <= length; j++) {
                if (nums[i] == nums[j]) {
                    for (int k = i; k <length ; k++) {
                        nums[k] = nums[k + 1];
                    }
                    nums[length] = 0;
                    length--;
                    j--;
                }
            }
        }
        length++;
        return length;
            
}
}