Java tutorial
import java.util.Arrays; import java.util.List; import java.util.stream.IntStream; public class Main { public static void main(String[] args) { List<String> stringList = Arrays.asList("1.2", "2.2", "3", "4", "5"); stringList.stream().flatMapToInt(n -> IntStream.of(Integer.parseInt(n))).forEach(System.out::println); } }