217. Contains Duplicate

class Solution {
    public boolean containsDuplicate(int[] nums) {
        Arrays.sort(nums);
        if(nums.length==0 || nums.length==1)
            return false;
        else
        {
            for(int i=0;i<nums.length-1;i++)
            {
                if(nums[i]==nums[i+1])
                    return true;
                
            }
            return false;
        }
    }
}