Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.OptionalLong;
import java.util.stream.LongStream;

public class Main {
    public static void main(String[] args) {
        LongStream b = LongStream.of(1L, 2L, 3L, 4L);

        OptionalLong v = b.reduce(Long::sum);
        if (v.isPresent()) {
            System.out.println(v.getAsLong());
        } else {
            System.out.println("no value");
        }

    }
}