摘要:希赛网整理了2017上半年软件设计师考试下午真题,以下是第六部分。
希赛网整理了2017上半年软件设计师考试下午真题,以下是第六部分。
试题六(共15分)
阅读下列说明和Java代码,将应填入(n)处的字句写在答题纸的对应栏内。
【说明】
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
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