JAVA--第八周实验--继承的练习

题目：

（1）封装一个People类型，具有height和weight属性，具有speakHello、averageHeight、averageWeight功能。

（2）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。

（3）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。

（4）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。

（5）用一个程序执行入口Test测试上述对象。

People类型：

abstract class People {
float height;
float weight;
void speakHello(){
System.out.println("Hello");
}
abstract void averageHeight();
void averageWeight(){
}
}

AmericanPeople类型

public class AmericanPeople extends People{

@Override
void averageHeight() {
// TODO Auto-generated method stub
height = 1.8f;
System.out.println("AmericanPeople height = "+height);
}
void speakHello(){
System.out.println("AmericanPeople say Hello");
}
void averageWeight(){
weight = 75;
System.out.println("AmericanPeople weight = "+weight);
}
//People的子类，新增AmericanBoxing功能，override超类的speakHello、averageHeight、averageWeight功能。
void AmericanBoxing(){
System.out.println("AmericanPeople Boxing well");
}
}

BeijingPeople类型

public class BeijingPeople extends ChinaPeople{
//是ChinaPeople的子类，新增BeijingOpera功能，override超类的speakHello、averageHeight、averageWeight功能。
void averageHeight() {
// TODO Auto-generated method stub
height = 1.75f;
System.out.println("BeijingPeople height = "+height);
}
void speakHello(){
System.out.println("BeijingPeople say Hello");
}
void averageWeight(){
weight = 73;
System.out.println("BeijingPeople weight = "+weight);
}
void BeijingOpera(){
System.out.println("BeijingPeople Opera best");
}
}

ChinaPeople类型

public class ChinaPeople extends People{

@Override
void averageHeight() {
// TODO Auto-generated method stub
height = 1.7f;
System.out.println("ChinaPeople height = "+height);
}
//新增chinaMartial功能，override超类的speakHello、averageHeight、averageWeight功能。
void speakHello(){
System.out.println("ChinaPeople say Hello");
}
void averageWeight(){
weight = 70;
System.out.println("ChinaPeople weight = "+weight);
}
void chinaMartial(){
System.out.println("ChinaPeople Martial best");
}
}

 

Test测试上述对象

public class Test {

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

System.out.println();

AmericanPeople AP = new AmericanPeople();
AP.speakHello();
AP.AmericanBoxing();
AP.averageHeight();
AP.averageWeight();

System.out.println();

BeijingPeople BP = new BeijingPeople();
BP.speakHello();
BP.averageHeight();
BP.averageWeight();
BP.BeijingOpera();

}

}

 

运行结果：