Find Numbers with Even Number of Digits

class Solution {
    public int findNumbers(int[] nums) {
        int counter = 0;
        int flag = 0;
        for(int i=0; i<nums.length; i++){
            while(nums[i]>0){
                nums[i] /= 10;
                counter++;
               // System.out.println(counter);
            }
           // System.out.println(counter);
            if(counter % 2 == 0)
                flag++;
            counter =0;
            //System.out.println(flag);
        }
    return flag;
    }
}