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继承

时间：2024-01-01 20:33:04 下载该word文档

实验3：继承请同学们完成下面程序填写题，另外，本次实现还包括教材中第4章编程题（实验题目2）。实验题目1：编写一个Java应用程序，除了主类外，该程序中还有4个类：People、ChinaPeople、AmericanPeople和BeijingPeople类。要求如下：People类有访问权限是protected的double型成员变量：height和weight，以及PublicvoidspeakHello(、publicvoidaverageHeight(和publicvoidaverageWeight(方法。ChinaPeople类是People的子类，新增了publicvoidchinaGongfu(方法。要求ChinaPeople重写父类的publicvoidspeakHello(、publicvoidaverageHeight(和publicvoidaverageWeight(方法。AmericanPeople类是People的子类，新增了publicvoidamericanBoxing(方法。要求ChinaPeople重写父类的publicvoidspeakHello(、publicvoidaverageHeight(和publicvoidaverageWeight(方法。BeijingPeople类是ChinaPeople的子类，新增了publicvoidbeijingOpera(方法。要求ChinaPeople重写父类的publicvoidspeakHello(、publicvoidaverageHeight(和publicvoidaverageWeight(方法。程序模板：Example.javaclassPeople{protecteddoubleweight,height;publicvoidspeakHello({System.out.println("yayawawa";}publicvoidaverageHeight({height=173;System.out.println("averageheight:"+height;}publicvoidaverageWeight({weight=70;System.out.println("averageweight:"+weight;}}classChinaPeopleextendsPeople{【代码1】//重写publicvoidspeakHello(方法，要求输出类似“你好，吃了吗”这样
的//汉语信息【代码2】//重写publicvoidaverageHeight(方法，要求输出类似//“中国人的平均身高：168.78厘米”这样的汉语信息【代码3】//重写publicvoidaverageWeight(方法，//要求输出类似“中国人的平均体重：65公斤”这样的汉语信息publicvoidchinaGongfu({【代码4】//输出中国武术的信息，例如："坐如钟,站如松,睡如弓"等}}classAmericanPeopleextendsPeople{【代码5】//重写publicvoidspeakHello(方法，要求输出类似//“Howdoyoudo”这样的英语信息。【代码6】//重写publicvoidaverageHeight(方法【代码7】//重写publicvoidaverageWeight(方法publicvoidamericanBoxing({【代码8】//输出拳击的信息，例如，“直拳”、“钩拳”等}