卡车要装载一批货物，货物有3种商品

来源：互联网发布：苹果手机进水数据恢复编辑：程序博客网时间：2024/06/02 17:06

2.卡车要装载一批货物，货物有3种商品：电视、计算机和洗衣机。需要计算出大货车和小货车各自所装载的3中货物的总重量。

编写一个Java应用程序，要求有一个ComputeWeight接口，该接口中有一个方法：public double computeWeight(); 有3个实现该接口的类：Television、Computer和WashMachine。这3个类通过实现接口ComputeWeight给出自重。

有一个Car类，该类用ComputeWeight接口类型的数组作为成员，那么该数组的元素就可以存放Television对象的引用、Computer对象的引用或WashMachine对象的引用。程序能输出Car对象所装载的货物的总重量

package homework2;/*File name:Car.cppAuthor:杨柳Date:2017/11/6IDE:eclipse*/class Car {ComputeWeight[] goods;double totalWeight=0;Car (ComputeWeight[] goods){this.goods=goods;}public static void main(String[] args) {// TODO Auto-generated method stubComputeWeight[] goods=new ComputeWeight[3];goods[0]=new Television(345.6); //上转型对象goods[1]=new Computer(789.3);goods[2]=new WashMachine(576.0);Car car=new Car(goods);double totalweight;totalweight=goods[0].computeWeight()+goods[1].computeWeight()+goods[2].computeWeight();System.out.println("所装载的货物的总重量为:"+totalweight);}}interface ComputeWeight {public double computeWeight(); }public class Computer implements ComputeWeight {double cweight;Computer(double c){this.cweight=c;}public double computeWeight(){return cweight;}}public class Television implements ComputeWeight { //通过实现接口ComputerWeight给出自重double tweight;Television(double t){this.tweight=t;}public double computeWeight(){return tweight;}}public class WashMachine implements ComputeWeight{double wweight;WashMachine(double w){this.wweight=w;}public double computeWeight(){return wweight;}}

阅读全文

0 0