Leetcode question of sorting

Duplicates.java

class Solution {
       public boolean containsDuplicate(int[] nums) {
           //first we'll sort our array
           Arrays.sort(nums);
        
           //if any number after sorting is equal to number after it, it means that number has a duplicate, hence, we return true
        for(int k = 0; k < nums.length - 1; k++){
            if(nums[k] == nums[k+1]){
                return true;
            }
        }
        //if you don't find any duplicate, return false
        return false;
    }
}