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考试题

目录

一、程序运行截图

二、代码

一、程序运行截图

二、代码

class  Student  {protected  double  height;protected  double  weight;public  double  getHeight()  {return  height;}public  void  setHeight(double  height)  {this.height  =  height;}public  double  getWeight()  {return  weight;}public  void  setWeight(double  weight)  {this.weight  =  weight;}public  void  speakHello()  {System.out.println("hello!");}public  void  averageHeight()  {System.out.println("avarge  heigh:"  +  height);}public  void  averageWeight()  {System.out.println("average  weight:"  +  weight);}
}class  LiberalArtsStudent  extends  Student  {public void speakHello() {System.out.println("hello,I am liberal arts student!");
}public  void  averageHeight()  {System.out.println("avarge heigh of LiberalArtsStudent:"  +  height);
}public  void  averageWeight()  {System.out.println("average weight of LiberalArtsStudent:"  +  weight);
}public void liberalArtsFeature(){System.out.println("I read history.");}
}
class  ScienceStudent  extends  Student  {public void speakHello() {System.out.println("hello,I am science student.");
}public  void  averageHeight()  {System.out.println("avarge heigh of ScienceStudent:"  +  height);
}public  void  averageWeight()  {System.out.println("average weight of ScienceStudent:"  +  weight);
}public void scienceFeature(){System.out.println("I do experiment.");}
}
public class TestStudent {public  static  void  main(String[]  args)  {ScienceStudent  chp  =  new  ScienceStudent();chp.height  =  180;chp.weight  =  130;chp.speakHello();chp.averageHeight();chp.averageWeight();chp.scienceFeature();LiberalArtsStudent  amp  =  new  LiberalArtsStudent();amp.setHeight(175);amp.setWeight(150);amp.speakHello();amp.averageHeight();amp.averageWeight();amp.liberalArtsFeature();
}
}

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