Question

如何用java编程，编写图上的程序？

Answer 1

按照题目要求编写的Java程序如下

C2.java文件

class PersonB{

 String name;

 int age;

 PersonB(){

  System.out.println("无参数的构造方法被调用");

 }

 PersonB(String name,int age){

  this.name=name;

  this.age=age;

 }

}

class StudentB extends PersonB{

 String department;

 StudentB(String name,int age,String department){

  super(name,age);

  this.department=department;

 }

 void introduce(){

  System.out.println("姓名:"+super.name+",年龄:"+super.age+",部门:"+this.department);

 }

}

public class C2{

 public static void main(String[] args){

  StudentB s1=new StudentB("张三",21,"你就读学校的名称");

  s1.introduce();

  StudentB s2=new StudentB("李四",22,"软件工程");

  s2.introduce();

 }

}

Answer 2