java cos 27 c3 a8 jvm

1private static void calcola(int i , function<integer , integer>fn){
2  int r = 0 ;
3  for (int j = i ; j>0 ; j--) r = fn.apply(r);
4  System.out.println(r);
5}
6calcola (9 , (p) -> {
7  return p + 1;});