第八次实验报告

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1、第八次实验实验1：中国人、北京人和美国人1.实验要求：编写程序模拟中国人、美国人是人，北京人是中国人。除主类外，程序中还有4个类：People、ChinaPeople、AmericanPeople和BeijingPeople类。要求如下：（1）People类有权限是protected的double型成员变量height和weight，以及publicvoidspeakHello（）、publicvoidaverageHeight（）和publicvoidaverageWeight（）方法。（2）Ch

2、inaPeople类是People的子类，新增了publicvoidaverageHeight（）和publicvoidaverageWeight（）方法。（3）AmericanPeople类是People的子类，新增方法publicvoidAmericanBoxing（）。要求AmericanPeople重写父类的publicvoidspeakHello（）、publicvoidaverageHeight（）和publicvoidaverageWeight（）方法。（4）BeijingPeople

3、类是ChinaPeople的子类，新增publicvoidbeijingOpera（）方法。2.实验代码：//People.javapublicclassPeople{protecteddoubleweight,height;publicvoidspeakHello(){System.out.println("yayayaya");}publicvoidaverageHeight(){height=173;System.out.println("averageheight:"+height);}pu

4、blicvoidaverageWeight(){weight=70;System.out.println("averageweight:"+weight);}}//ChinaPeople.javapublicclassChinaPeopleextendsPeople{publicvoidspeakHello(){System.out.println("您好");}publicvoidaverageHeight(){height=168.78;System.out.println("中国人的平均身高：

5、"+height+"厘米");}publicvoidaverageWeight(){weight=65;System.out.println("中国人的平均体重："+weight+"千克");}publicvoidchinaGongfu(){System.out.println("坐如钟，站如松，睡如弓");}}//AmericanPeople.javapublicclassAmericanPeopleextendsPeople{publicvoidspeakHello(){System.out.p

6、rintln("Howdoyoudo");}publicvoidaverageHeight(){height=176;System.out.println("American'saverageheight:"+height+"厘米");}publicvoidaverageWeight(){weight=75;System.out.println("American'saverageweight:"+weight+"kg");}publicvoidamericanBoxing(){System.out

7、.println("直拳，勾拳，组合拳");}}//BeijingPeople.javapublicclassBeijingPeopleextendsChinaPeople{publicvoidaverageHeight(){height=172.5;System.out.println("北京人的平均身高:"+height+"厘米");}publicvoidaverageWeight(){weight=70;System.out.println("北京人得平均体重："+weight+"千克");}

8、publicvoidbeijingOpera(){System.out.println("花脸、青衣、花旦和老生");}}//Example.javapublicclassExample{publicstaticvoidmain(Stringarg[]){ChinaPeoplechinaPeople=newChinaPeople();AmericanPeopleamericanPeople=newAmericanPeople();BeijingPeoplebeijin