public List findClosestElements(int[] arr, int k, int x) {
int low = 0;
int high = arr.length-1;
while(high-low>=k){
if(Math.abs(x-arr[low])>Math.abs(x-arr[high]))
low++;
else
high--;
}
// List<Integer> l = IntStream.of(arr).boxed().collect(Collectors.toList());;
// l = l.subList(low, high+1);
ArrayList<Integer> l = new ArrayList<Integer>();
for(int i=low;i<=high;i++){
l.add(arr[i]);
}
return l;
}