未分类题

某快餐厅主要制作并出售儿童套餐，一般包括主餐（各类比萨）、饮料和玩具，其餐品种类可能不同，但其制作过程相同。前台服务员（Waiter）调度厨师制作套餐。现采用生成器（Builder）模式实现制作过程，得到如图6-1所示的类图。

【Java代码】
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("pan baked+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 viod mainSting[]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