참가자들

암호

public class Main {

    public static void main(String[] args) {
        Director director = new Director();

        Builder b1 = new ConcreteBuilder1();
        Builder b2 = new ConcreteBuilder2();

        director.construct(b1);
        Product p1 = b1.getResult();
        p1.show();

        director.construct(b2);
        Product p2 = b2.getResult();
        p2.show();
    }
}

public class Director {

    public void construct(Builder builder) {
        builder.buildPartA();
        builder.buildPartB();
    }
}

public interface Builder {

    Product getResult();

    void buildPartA();

    void buildPartB();
}

public class ConcreteBuilder1 implements Builder {

    private Product product = new Product();

    @Override
    public Product getResult() {
        return product;
    }

    @Override
    public void buildPartA() {
        product.add("PartA");
    }

    @Override
    public void buildPartB() {
        product.add("PartB");
    }
}

public class ConcreteBuilder2 implements Builder {

    private Product product = new Product();

    @Override
    public Product getResult() {
        return product;
    }

    @Override
    public void buildPartA() {
        product.add("PartX");
    }

    @Override
    public void buildPartB() {
        product.add("PartY");
    }
}

public class Product {

    private List<String> parts = new ArrayList<>();

    public void show() {
        System.out.println("\nProduct Parts -------");
        for (String part : parts) {
            System.out.println(part);
        }
    }

    public void add(String part) {
        parts.add(part);
    }
}

산출

Product Parts -------
PartA
PartB

Product Parts -------
PartX
PartY

eidherjulian61 / 디자인 패턴