Java tutorial
import java.util.stream.IntStream; import java.util.stream.LongStream; public class Main { public static void main(String[] args) { IntStream i = IntStream.of(6, 5, 7, 1, 2, 3, 3); LongStream d = i.mapToLong(n -> { return (long) n; }); d.forEach(System.out::println); } }