Java tutorial
import java.util.ArrayList; import java.util.List; import java.util.stream.LongStream; public class Main { public static void main(String[] args) { LongStream b = LongStream.of(1L, 2L, 3L, 4L); List<Long> v = b.collect(ArrayList::new, ArrayList::add, ArrayList::addAll); System.out.println(v); } }