Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.ArrayList;
import java.util.List;
import java.util.stream.IntStream;

public class Main {

    public static void main(String[] args) throws Exception {

        List<Foo> foos = new ArrayList<>();

        IntStream.range(1, 4).forEach(num -> foos.add(new Foo("Foo" + num)));

        foos.forEach(f -> IntStream.range(1, 4).forEach(num -> f.bars.add(new Bar("Bar" + num + " <- " + f.name))));

        foos.stream().flatMap(f -> f.bars.stream()).forEach(b -> System.out.println(b.name));
    }

    static class Foo {
        String name;
        List<Bar> bars = new ArrayList<>();

        Foo(String name) {
            this.name = name;
        }
    }

    static class Bar {
        String name;

        Bar(String name) {
            this.name = name;
        }
    }
}