中国人、美国人、北京人

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

package people;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、花旦和老生");}}

package people;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、行如风");}}

package people;public class People {//基类double height;double weight;public void speakHello(){}public void averageHeight(){}public void averageWeight(){}}

package people;public class Example {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubChinaPeople 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();}}