[hackerrank][java8][clojure] Simple Array Sum

/* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
Scanner scan = new Scanner(System.in);
int[] i_arr = new int[scan.nextInt()];
for(int i = 0 ; i < i_arr.length; i++) 
  i_arr[i] = scan.nextInt();

System.out.println(Arrays.stream(i_arr).sum());

clojure코드도 한번 써봤다

(use '[clojure.string :only (split trim)])

(let [
  n (Integer/parseInt (read-line))
  arr_t (split (read-line) #"\s+") 
  arr (map #(Integer/parseInt %) arr_t)]
  (println (reduce + arr))   
)

비교를하면

Arrays.stream(i_arr).sum()

이것과

(reduce + arr)

이것의 차이