Don't do that at home kid, it burns !

Main.java

import static java.util.Arrays.asList;

import java.util.List;
import java.util.stream.Stream;

public class Main {

    public static void main(String[] args) {
        List<Integer> numbers = asList(1, 2, 3, 4, 5);
        int[] factor = {2};
        Stream<Integer> integerStream = numbers.stream()
                .filter(i -> i % 2 == 0)
                .map(i -> i * factor[0]);
        factor[0] = 3;

        integerStream
                .forEach(System.out::println);
    }
}