int[] arr = new int[10000000]

for (int i = 0; i < 10000000; i++) {
  arr[i] = i
}

def t0 = System.currentTimeMillis()
long sum = 0

for (int i = 0; i < 10000000; i++) {
  sum += arr[i]
}

def t1 = System.currentTimeMillis()

printf("The call took %dms to run. Sum is %d\n", (t1 - t0), sum)