1. class Pizza { 2. java.util.ArrayList toppings； 3. public final void addTopping（String topping） { 4. toppings.add（topping）； 5. } 6. } 7. public class PepperoniPizza extends Pizza { 8. public void addTopping（String topping） { 9. System.out.println（”Cannot add Toppings”）； 10. } 11. public static void main（String[] args） { 12. Pizza pizza = new PepperoniPizza（）； 13. pizza.addTopping（”Mushrooms”）； 14. } 15. } What is the result？（） A、 Compilation fails.B、 Cannot add ToppingsC、 The code runs with no output.D、 A NullPointerException is thrown in Line 4.
1. class Pizza { 2. java.util.ArrayList toppings； 3. public final void addTopping（String topping） { 4. toppings.add（topping）； 5. } 6. } 7. public class PepperoniPizza extends Pizza { 8. public void addTopping（String topping） { 9. System.out.println（”Cannot add Toppings”）； 10. } 11. public static void main（String[] args） { 12. Pizza pizza = new PepperoniPizza（）； 13. pizza.addTopping（”Mushrooms”）； 14. } 15. } What is the result？（）
- A、 Compilation fails.
- B、 Cannot add Toppings
- C、 The code runs with no output.
- D、 A NullPointerException is thrown in Line 4.
相关考题：
1． Everyone in our class ________ ．A． like singingB． likes play footballC． like watch TVD． likes playing games
– Would you like pizza or pie? -- ________________A、I like.B、I don’t like eating pizza.C、I don’t want pizza.D、Neither.
Mary: How about going to dinner at Pizza Hut tonight?Jean: ___________A、Forget it.B、Sorry,I like pizza.C、That's great!D、Glad you like it.
阅读下列说明和 C++代码，将应填入(n)处的字句写在答题纸的对应栏内。 【说明】 某快餐厅主要制作井出售儿童套餐，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 5-1 所示的类图。图5-1 类图 【C++代码】 includeiostream include string using namespace std; class Pizza { private: string parts; public: void setParts(string parts) { this-parts=parts; } string getParts() { return parts; } }; class PizzaBuilder { protected:Pizza* pizza; public: Pizza* getPizza() { retum pizza; } void createNewPizza() { pizza = new Pizza(); } ( 1 ); } class HawaiianPizzaBuilder :public PizzaBuilder { public: void buildParts() { pizza-setParts(cross +mild + hampineapple); } }; class SpicyPizzaBuider: public PizzaBuilder { public: void buildParts() { pizza-setParts(pan baked +hot + hampineapple); } } Class Waiter{ Private: PizzaBuilder* pizzaBuilder; public: void setPizzaBuilder(PizzaBuilder* pizzaBuilder) { /*设置构建器*/ ( 2 ) } Pizza* getPizza() { return pizzaBuilder-getPizza(); } void construct() { /*构建*/ pizzaBuilder-createNewPizza(); ( 3 ) } }; int main(){ Waiter*waiter=new Waiter(); PizzaBuilder*hawaiian pizzabuilder=new HawaiianPizzaBuilder() ( 4 ); ( 5 ); cout pizza: waiter-getPizza()-getParts() endl; } 程序的输出结果为: pizza: cross + mild + hampineapple
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 + hampineapp1e}; } class SpicyPizzaBuilder extends PizzaBuilder { public void buildParts() { pizza.setParts(pan baked + hot + pepperonisalami); } } 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 + hampineapple
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单选题1. class Pizza { 2. java.util.ArrayList toppings； 3. public final void addTopping（String topping） { 4. toppings.add（topping）； 5. } 6. } 7. public class PepperoniPizza extends Pizza { 8. public void addTopping（String topping） { 9. System.out.println（”Cannot add Toppings”）； 10. } 11. public static void main（String[] args） { 12. Pizza pizza = new PepperoniPizza（）； 13. pizza.addTopping（”Mushrooms”）； 14. } 15. } What is the result？（）A Compilation fails.B Cannot add ToppingsC The code runs with no output.D A NullPointerException is thrown in Line 4.
单选题Given a class Repetition： 1. package utils； 2. 3. public class Repetition { 4. public static String twice（String s） { return s + s； } 5. } and given another class Demo： 1. // insert code here 2. 3. public class Demo { 4. public static void main（String[] args） { 5. System.out.println（twice（”pizza”））； 6. } 7. } Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”？（）A import utils.*；B static import utils.*；C import utils.Repetition.*；D static import utils.Repetition. *；E import utils.Repetition.twice（）；F import static utils.Repetition.twice；G static import utils.Repetition.twice；