Java List filter, map and reduce to sum via Stream

import java.util.Arrays;
import java.util.Iterator;
import java.util.List;

public class Main {
  public static void main(String[] args) {
    List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);
    int sum = numbers.stream()
                     .filter(n -> n % 2 == 1)
                     .map(n -> n * n)
                     .reduce(0, Integer::sum);

    System.out.println(sum);//from   ww  w.ja v a  2s. c  o m
  }
}