人类
package 一个小java;
public class People {
protected double weight,height;
public void speakhello() {
System.out.println("yayaya");
}
public void averageHeight() {
height=173;
System.out.println("average height:"+height);
}
public void averageWeight() {
weight=70;
System.out.println("average weight:"+weight);
}
}
中国人（最重要的是extends people）
package 一个小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() {
weight = 65;
System.out.println("中国人的平均体重:"+weight+"千克");
}
public void chinaGongfu() {
System.out.println("坐如钟,站如松,睡如弓");
}
}
美国人
package 一个小java;
public class AmericanPeople extends People {
public void speakhello() {
System.out.println("How do you do");
}
public void averageHeight() {
height = 176;
System.out.println("American averageheight:"+height+"cm");
}
public void averageWeight() {
weight = 75;
System.out.println("American averageweight:"+weight+"kg");
}
public void americanBoxing() {
System.out.println("直拳,勾拳,组合拳");
}
}
北京人
package 一个小java;
public class BeijingPeople extends ChinaPeople{
public void averageHeight() {
height = 172.5;
System.out.println("北京人的平均身高:"+height+"厘米");
}
public void averageWeight() {
weight = 70;
System.out.println("北京人的平均体重:"+weight+"千克");
}
public void beijingOpera() {
System.out.println("花脸、青衣、花旦和老旦");
}
}
例
package 一个小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();
}
}
