继承与接口实验

System.out.println("中国人的平均体重：67.34公斤");
}
public void chinaGongfu() {
System.out.println("坐如钟,站如松,睡如弓");
}
}
class AmericanPeople extends People {
public void speakHello(){
public void speakHello(){
System.out.println("您好");
}
public void averageHeight(){
System.out.println("北京人的平均身高: 167.0 cm");
}
public void averageWeight(){
System.out.println("北京人的平均体重: 68.5 kg");
{
ComputerWeight[] goodsOne=new ComputerWeight[50],goodsTwo=new ComputerWeight[22];
AmericanPeople americanPeople=new AmericanPeople( );
BeijingPeople beijingPeople=new BeijingPeople( );
chinaPeople.speakHello( );
americanPeople.speakHello( );
System.out.println("average height:"+height);
}
public void averageWeight( ) {
weight=70;
System.out.println("average weight:"+weight);
}
}
class ChinaPeople extends People {
ChinaPeople类是People的子类，新增了public void chinaGongfu()方法。要求ChinaPeople重写父类的public void speakHello()、public void averageHeight()和public void averageWeight()方法。
}
Company company=new Company(employee);
System.out.println("公司年工资总额:"+ company.salariesPay());//调用Company对象的方法输出工资总额
}
}
运行截屏：
实验3
源代码：interface ComputerWeight
AmericanPeople类是People的子类，新增public void americanBoxing()方法。要求AmericanPeople重写父类的public void speakHello()、public void averageHeight（）和public void averageWeight()方法。
for(int i=0;i<goods.length;i++)
{
totalWeights+=goods[i].computeWeight();
}
return totalWeights;
}
}
public class Road
{
public static void main(String[] args)
BeijingPeople是ChinaPelple的子类，新增public void beijingOpera()方法。要求ChinaPeople重写父类的public void speakHello()、public void averageHeight()和public void averageWeight()方法。
深圳大学
实验报告
课程名称：Java
实验序号：实验2
实验名称：继承与接口
班级：计算机3姓名：卢志敏
同组人：实验日期：2008年11月16日
教师签字：
一、实验目的
1.继承
子类的继承性
子类对象的创建过程
成员变量的继承与隐藏
方法的继承与重写
2.上转型对象
掌握上转型对象的使用
3.接口回调
掌握接口回调技术
二、实验环境
}
}
class Car
{
ComputerWeight[] goods;
double totalWeights=0;
Car(ComputerWeight[] goods)
{
this.goods=goods;
}
public double getTotalWeights()
{
totalWeights=0;
{
salaries=salaries+employee[i].earnings();
}
return salaries;
}
}
public class HardWork
{
public static void main(String args[])
{
Employee[] employee=new Employee[20];
}
}
class Company
{
Employee[] employee;
double salaries;
Company (Employee[] employee)
{
this.employee=employee;
}
public double salariesPay()
{
salaries=0;
for(int i=0;i<employee.length;i++)
实验2
要求有一个abstract类，类名为Employee。Employee的子类有YearWorker、MonthWorker和WeekWorker。YearWorker对象按年领取薪水，MonthWorker按月领取薪水，WeekWorker按周领取薪水。Employee类有个abstract方法：
for(int i=0;i<employee.length;i++)
{
if(i%3==0)
employee[i]=new WeekWorker();
else if(i%3==1)
employee[i]=new MonthWorker();
else if(i%3==2)
employee[i]=new YearWorker();
}
}
class MonthWorker extends Employee
{
public double earnings( ){
return 12*2300;
}
}
class WeekWorker extends Employee
{
public double earnings( ){
return 48*500;
有一个Car类，该类用ComputeWeight接口类型的数组作为成员，那么该数组的单元就可以存放Television对象的引用、Computer对象的引用或WashMachine对象引用。程序能输出Car对象所能装载的货物的总重量。
按程序模板的要求编写源文件，要特别注意程序的输出结果，并能正确解释输出的结果。
{
public double computeWeight();
}
class Television implements ComputerWeight
{
public double computeWeight()
{
return 10;//实现computeWeight()方法
}
}
class Computer implements ComputerWeight
}
public void beijingOpera() {
System.out.println("京剧术语");
}
}
public class Example {
public static void main(String args[ ]) {
ChinaPeople chinaPeople=new ChinaPeople( );
beijingPeople.speakHello( );
chinaPeople.averageHeight( );
americanPeople.averageHeight( );
beijingPeople.averageHeight( );
chinaPeople.averageWeight( );
americanPeople.averageWeight( );
System.out.println("American Average weight: 80.23 kg");
}
public void americanBoxing() {
System.out.println("直拳钩拳");
}
}
class BeijingPeople extends ChinaPeople {
{
public double computeWeight()
{
return 15;//实现computeWeight()方法
}
}
class WashMachine implements ComputerWeight