云大设计模式实验3装饰着模式

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1、云南大学软件学院实验报告课程：设计模式实验学期：2010-2011学年第一学期任课教师：专业：学号：姓名：成绩：实验3装饰者模式1.题目:使用装饰着模式实现一个小吃店供应食物，然后计算费用并输出所点的食物和消费金额的程序，其中的被装饰者是粗米线、细米线、面条，装饰者是炸酱、焖肉、番茄鸡蛋以及酱油、醋、辣椒和葱花。2.模式设计的UML类图：3.程序源代码：（1）食品抽象类FoodStuff.java：publicabstractclassFoodStuff{Stringdescription="UnknownFoodStuff";publicStringg

2、etDescription(){returndescription;}publicabstractdoublecost();}（2）被装饰者的各个子类：publicclassThickRicenoodlesextendsFoodStuff{publicThickRicenoodles(){description="粗米线";}publicdoublecost(){return4.0;}}publicclassThinRicenoodlesextendsFoodStuff{publicThinRicenoodles(){description="细米线";

3、}publicdoublecost(){return3.0;}}publicclassNoodlesextendsFoodStuff{publicNoodles(){description="面条";}publicdoublecost(){return2.0;}}（3）调味品抽象类CondimentDecorator.java：publicabstractclassCondimentDecoratorextendsFoodStuff{publicabstractStringgetDescription();}（4）调料装饰者的各个子类：publiccla

4、ssFiredbeansauceextendsCondimentDecorator{FoodStufffoodstuff;publicFiredbeansauce(FoodStufffoodstuff){this.foodstuff=foodstuff;}publicStringgetDescription(){returnfoodstuff.getDescription()+",炸酱";}publicdoublecost(){return2.0+foodstuff.cost();}}publicclassDaubeextendsCondimentDec

5、orator{FoodStufffoodstuff;publicDaube(FoodStufffoodstuff){this.foodstuff=foodstuff;}publicStringgetDescription(){returnfoodstuff.getDescription()+",焖肉";}publicdoublecost(){return2.0+foodstuff.cost();}}publicclassTomatoAndEggextendsCondimentDecorator{FoodStufffoodstuff;publicTomat

6、oAndEgg(FoodStufffoodstuff){this.foodstuff=foodstuff;}publicStringgetDescription(){returnfoodstuff.getDescription()+",番茄鸡蛋";}publicdoublecost(){return2.0+foodstuff.cost();}}（5）佐料装饰者的各个子类：publicclassSoyextendsCondimentDecorator{FoodStufffoodstuff;publicSoy(FoodStufffoodstuff){this

7、.foodstuff=foodstuff;}publicStringgetDescription(){returnfoodstuff.getDescription()+",酱油";}publicdoublecost(){return0.0+foodstuff.cost();}}publicclassVinegarextendsCondimentDecorator{FoodStufffoodstuff;publicVinegar(FoodStufffoodstuff){this.foodstuff=foodstuff;}publicStringgetDes

8、cription(){returnfoodstuff.getDescriptio