1346. Check If N and Its Double Exist

class Solution {
    public boolean checkIfExist(int[] arr) 
    {
        HashSet<Double> h = new HashSet<Double>();
        for(int i:arr)
        {
            if(h.contains(i))
                continue;
            if(h.contains((double)i*2))
                return true;
            if(h.contains((double)i/2))
                return true;
            h.add((double)i);
        }
        return false;
    }
}