Force deduction brush question 26. Delete duplicates in the ordered array

Use the double finger method , Ideas as follows .

class Solution {
    
    public int removeDuplicates(int[] nums) {
    
        if(nums.length == 0){
     return 0;}
        int p = 0;
        int q = 1;
        while(q<nums.length){
    
            if(nums[p] != nums[q]){
    
               nums[p+1] = nums[q];
               p++;
            }
            q++;
        }
        return p+1;
    }
}