中国人与美国人java代码

People.java

public class People { 
	protected double weight,height;
	public void speakHello() { 
		System.out.println("yayayaya");
		}
	public void averageHeight() { 
		height=173; 
		System.out.println("average height:"+height); 
		}
	public void averageWeight() { 
		weight=70;
		System.out.println("average weight:"+weight);
		}
	}

ChinaPeople.java

public class ChinaPeople extends People { 
	public void speakHello() { 
		System.out.println("您好"); 
		}
	public void averageHeight() {
		height = 168.78; 
		System.out.println("中国人的平均身高:"+height+" 厘米"); 
		}
	public void averageWeight(){
		System.out.println("中国人的平均体重:65公斤");
	}
	public void chinaGongfu() {
		System.out.println("坐如钟,站如松,睡如弓");
		} 
	}

AmericanPeople.java

public class AmericanPeople extends People { 
 public void speakHello(){
	 System.out.println("How do you do"); 
 }
	 public void averageHeight(){
		 System.out.println("American's average height:176 cm"); 
		 }
	 public void averageWeight() { 
		 weight = 75;
		 System.out.println("American's average weight:"+weight+" kg");
		 }
	 public void americanBoxing() { 
		 System.out.println("直拳、钩拳、组合拳");
		 } 
	 }

BeijingPeople .java

public class BeijingPeople extends ChinaPeople { 
public void averageHeight(){
		System.out.println("北京人的平均身高:172.5 厘米");
		} 
public void averageWeight(){
	System.out.println("北京人的平均体重:70 公斤"); 
}
public void beijingOpera() {
	System.out.println("花脸、青衣、花旦和老生"); 
	} 
}

Example.java

public class Example { 
	public static void main(String args[]) { 
		ChinaPeople chinaPeople=new ChinaPeople(); 
		AmericanPeople americanPeople=new AmericanPeople();
		BeijingPeople beijingPeople=new BeijingPeople(); 
		chinaPeople.speakHello(); 
		americanPeople.speakHello(); 
		beijingPeople.speakHello(); 
		chinaPeople.averageHeight(); 
		americanPeople.averageHeight();
		beijingPeople.averageHeight();
		chinaPeople.averageWeight(); 
		americanPeople.averageWeight(); 
		beijingPeople.averageWeight(); 
		chinaPeople.chinaGongfu(); 
		americanPeople.americanBoxing(); 
		beijingPeople.beijingOpera() ; 
		beijingPeople.chinaGongfu(); 
		} 
	}

运行结果：