더 자바, Java 8

public class KeesunChicken implements Chicken {

}

public class App {

    public static void main(String[] args) {

        Chicken keesun = new KeesunChicken();

        Egg egg = keesun.create();

    }

}

Chicken.takesCare(new Egg() {

    @Override

    public String wannaBe() {

        return "양념반 후라이드반";

    }

});

Chicken.takesCare(() -> "양념반 후라이드반");

List<EggWithColorAndSize> eggs = new ArrayList<>();

eggs.add(EggWithColorAndSize.of().size(3).color("yellow"));

eggs.add(EggWithColorAndSize.of().size(4).color("white"));

eggs.add(EggWithColorAndSize.of().size(3).color("white"));

eggs.add(EggWithColorAndSize.of().size(5).color("yellow"));

eggs.add(EggWithColorAndSize.of().size(3).color("brown"));

eggs.add(EggWithColorAndSize.of().size(4).color("yellow"));

eggs.stream().filter(e -> e.getColor().equals("yellow"))

        .sorted(Comparator.comparingInt(EggWithColorAndSize::getSize))

        .map(EggWithColorAndSize::wannaBe)

        .forEach(System.out::println);

CompletableFuture<Void> future = CompletableFuture.supplyAsync(() -> {

    System.out.println("꼬기오~ 꼬꼬꼬꼬~ " + Thread.currentThread().getName());

    return EggWithColorAndSize.of().size(5).color("white");

}).thenAccept((egg) -> {

    System.out.println("냠냠냠: " + egg.wannaBe());

});

future.get();