JAVA实验6答案

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1、GDOU-B-11-112广东海洋大学学生实验报告书（学生用表）实验名称实验六.Java的接口与实现课程名称Java程序设计与开发技术课程号16232204学院(系)信息学院专业计算机科学与技术班级计科学生姓名学号实验地点钟海楼04019实验日期2015年10月26日一、实验目的（1）学习掌握Java中类怎样实现接口、接口回调技术；（2）学习掌握Java程序中面向接口的编程思想。二、实验任务完成实验六指导上实验1、实验2、实验3的实验任务。三、实验仪器设备和材料安装有J2SE开发工具的PC机。四、实验内容和步骤实验1代码如下：Estimator.javainterfaceCompure

2、rAverage{publicdoubleaverage(doublex[]);}classGymnasticsimplementsCompurerAverage{publicdoubleaverage(doublex[]){intcount=x.length;doubleaver=0,temp=0;for(inti=0;i

3、>2)aver=aver/(count-2);elseaver=0;returnaver;}}classSchoolimplementsCompurerAverage{publicdoubleaverage(double[]x){intcount=x.length;doublesum=0;for(inti=0;i

4、.97};doubleb[]={89,56,78,90,100,77,56,45,36,79,98};CompurerAveragecomputer;computer=newGymnastics();doubleresult=computer.average(a);System.out.printf("%n");System.out.printf("体操选手最后得分：%5.3f",result);computer=newSchool();result=computer.average(b);System.out.printf("班级考试平均分数：%-5.2f",result);

5、}}运行结果：练习：----------JAVAC----------Estimator.java:27:错误:School不是抽象的,并且未覆盖CompurerAverage中的抽象方法average(double[])classSchoolimplementsCompurerAverage{^1个错误实验2代码如下：CheckCarWeight.javainterfaceComputerWeight{publicdoublecomputerWeight();}classTelevisionimplementsComputerWeight{publicdoublecomputerWe

6、ight(){return10.0;}}classComputerimplementsComputerWeight{publicdoublecomputerWeight(){return8.0;}}classWashMachineimplementsComputerWeight{publicdoublecomputerWeight(){return35.5;}}classTruck{ComputerWeight[]goods;doubletotalWeihts=0;Truck(ComputerWeight[]goods){this.goods=goods;}publicvoidsetG

7、oods(ComputerWeight[]goods){this.goods=goods;}publicdoublegetTotalWeigths(){totalWeihts=0;for(inti=0;i