Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;

public class Main {
    public static void main(String[] args) {
        List<Person> persons = Arrays.asList(new Person("FooBar", 12), new Person("BarFoo", 16));
        Stream<Integer> stream = persons.stream().map(x -> x.getAge());
        int sum = stream.reduce(0, (l, r) -> l + r);
        System.out.println(sum);
    }

}

class Person {
    private final String name;
    private final Integer age;

    public Person(String name, Integer age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public Integer getAge() {
        return age;
    }
}