java 第八周 继承 接口

/* (程序头部注释开始)
* 程序的版权和版本声明部分
* Copyright (c) 2011, 烟台大学计算机学院学生
* All rights reserved.
* 文件名称：
* 作    者：   姜雅明
* 完成日期：   2012  年  10  月  18  日
* 版 本 号：   2.0

* 对任务及求解方法的描述部分
* 输入描述：
* 问题描述：
* 程序输出：
* 程序头部的注释结束
*/

/*封装一个People类型，具有height和weight属性，
*具有speakHello、averageHeight、averageWeight功能。
*/
public class People {
protected int height;
protected int weight;

People(){
height = 180;
weight = 65;
}
public void speakHello(){
System.out.println("Hello");
}
public void averageHeight(){
System.out.println("the averageHeight is:" + height);
}
public void averageWeight(){
System.out.println("the averageWeight is:" + weight);
}
}

/*封装一类ChinaPeople类型是People的子类，新增chinaMartial功能，
* override超类的speakHello、averageHeight、averageWeight功能。
*/
public class ChinaPeople extends People
{
ChinaPeople(){
super();
this.height = 175;
this.weight = 55;
}
public void chinaMartial(){
System.out.println("中国爱好和平。");
}
public void speakHello(){
System.out.println("你好");
}
public void averageHeight(){
//System.out.println(super.height);
System.out.println("中国人的平均身高是：" + height);
}
public void averageWeight(){
System.out.println("中国人的平均体重是：" + weight);
}
}

/*封装一类AmericanPeople类型是People的子类，
* 新增AmericanBoxing功能，
* override超类的speakHello、averageHeight、averageWeight功能。
*/

public class AmericanPeople extends People
{
AmericanPeople(){
super();
}
public void AmericanBoxing(){
System.out.println("This is America Boxing!!!");
}
public void speakHello(){
System.out.println("Hello,I'm from America.");
}
public void averageHeight(){
System.out.println("The averageheight of America is ：" + height);
}
public void averageWeight(){
System.out.println("The averageweight of America is ：" + weight);
}
}

/*封装一类BeijingPeople类型是ChinaPeople的子类，
* 新增BeijingOpera功能，
* override超类的speakHello、averageHeight、averageWeight功能。
*/

public class BeijingPeople extends ChinaPeople
{
BeijingPeople(){
super();
}
public void BeijngOpera(){
System.out.println("国粹京剧");
}
public void speakHello(){
System.out.println("你好，我是北京人。");
}
public void averageHeight(){
System.out.println("北京人的平均身高是：" + height);
}
public void averageWeight(){
System.out.println("北京人的平均体重是：" + weight);
}
}

public class Test {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
People p = new People();
ChinaPeople c = new ChinaPeople();
p.averageHeight();
p.averageWeight();
c.averageHeight();
c.averageWeight();
}

}

package two;

/*封装一类接口ComputerWeight，该接口中有3个功能：double computrWeight，void printName，double printPrice。
*/

public interface ComputerWeight {
double computerWeight();
void printName();
double printPrice(double price);
}

package two;

/*封装一类接口ComputerCompany，该接口有2个功能：String computerName，void printFunction。
*/

public interface ComputerCompany {
String computerName(String name);
void printFunction();
}

package two;

/*封装一类对象FlashMemory实现上述两类接口。
*/

public class FlashMemory implements ComputerCompany, ComputerWeight
{
private String name;
private double price;

public double computerWeight()
{
double weight = 30;
return weight;
}
public void printName()
{
System.out.println("The name of the computer is : " + name);
}
@Override
public String computerName(String name) {
this.name = name;
return this.name;
}
@Override
public void printFunction() {
System.out.println("This computer can do everything!!!");

}
@Override
public double printPrice(double price) {
this.price = price;
return this.price;
}
}

package two;

public class Test {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
FlashMemory f = new FlashMemory();
String str = "lenovo";
f.computerName(str);
f.printName();
System.out.println("The weight of the computer is : " + f.computerWeight());
f.printFunction();
System.out.println("The price of the computer is :" + f.printPrice(7998));
}

}