higaki

import java.util.Arrays;
import java.util.stream.Collectors;

public class ex2 {
	public static void main(String[] args) {
		var a = Arrays.asList(1, 2, 3, 5);

		var result = a.stream().filter(i -> i % 2 == 1);

		System.out.println(

higaki

import java.util.Arrays;

public class ex3 {
	public static void main(String args[]) {
		var a = Arrays.asList(1, 2, 3, 5);

		var result = a.stream().reduce(1, (s, i) -> s * i);

		System.out.println(result);
	}