class Pizza {
    private String parts;
    public void setParts(String parts) { this.parts = parts; }
    public String toString() { return this.parts; }
}

abstract class PizzaBuilder {
    protected Pizza pizza;
    public Pizza getPizza() { return pizza; }
    public void createNewPizza() { pizza = new Pizza(); }
    public (1);
}

class HawaiianPizzaBuilder extends PizzaBuilder {
    public void buildParts() { pizza.setParts("cross + mild + ham&pineapp1e"); }
}

class SpicyPizzaBuilder extends PizzaBuilder {
    public void buildParts() {
        pizza.setParts("panbaked + hot + pepperoni&salami");
    }
}

class Waiter {
    private PizzaBuilder pizzaBuilder;
    public void setPizzaBuilder(PizzaBuilder pizzaBuilder) { /* 设置构建器 */
        (2);
    }
    public Pizza getPizza() { return pizzaBuilder.getPizza(); }
    public void construct() { /* 构建 */
        pizzaBuilder.createNewPizza();
        (3);
    }
}

class FastFoodOrdering {
    public static void main(String[]args) {
        Waiter waiter = new Waiter();
        PizzaBuilder hawaiian_pizzabuilder = new HawaiianPizzaBuilder();
        (4);
        (5);
        System.out.println("pizza：" + waiter.getPizza());
    }
}

程序的输出结果为：
pizza：cross + mild + ham&pineapple