80题通关Java基础：第57题 填写代码,基类Person(10分)

目录

• ​​第57题 填写代码,基类Person(10分)​​

• ​​🍋题目描述​​
• ​​🍋源代码​​

第57题 填写代码,基类Person(10分)

🍋题目描述

以下程序是以Person为例的有关抽象类定义有使用的例子，请将下面程序的【代码】替换为Java程序代码，使程序运行正确。
文件Main.java

import java.util.Scanner;
 public class Main
 {
 public static void main(String[] args)
 {
 Student[] aStudent = new Student[3];
 Scanner reader=new Scanner(System.in);
 aStudent[0] = new Student(“Tom”,reader.nextLine());
 aStudent[1] = new Student(“Dick”,reader.nextLine());
 aStudent[2] = new Student(“Harry”,reader.nextLine());
 for(Student 【代码1】: aStudent)
 {
 System.out.println(“name=” + e.getName() + “,id=” + e.getDescription());
 }
 System.out.println(“The Main class is end.”);
 }
 }
 【代码2】 class Person {
 private String name;
 public String getName() {
 return name;
 }
 public Person(String n){
 name=n;
 }
 public abstract String getDescription();
 }
 class Student extends Person
 {
 private String 【代码3】;
 public Student(String n, String m)
 {
 super(n);
 major = m;
 }
 @Override
 【代码4】getDescription(){
 return "a student majoring in " + major;
 }
 }

输入：
n个数
输出：
按程序运行结果
The Main class is end.

样例输入：
Math
En
Phy
样例输出：
name=Tom,id=a student majoring in Math
name=Dick,id=a student majoring in En
name=Harry,id=a student majoring in Phy
The Main class is end.

🍋源代码

import java.util.Scanner;
public class Main
{
   public static void main(String[] args)
   {
      Student[] aStudent = new Student[3];
      Scanner reader=new Scanner(System.in);
      aStudent[0] = new Student("Tom",reader.nextLine());
      aStudent[1] = new Student("Dick",reader.nextLine());
      aStudent[2] = new Student("Harry",reader.nextLine());
      for(Student e: aStudent)
      {
    System.out.println("name=" + e.getName() + ",id=" + e.getDescription());
      }
      System.out.println("The Main class is end.");
   }
}
abstract class Person {
private String name;
public String getName() {
return name;
}
public Person(String n){
name=n;
}
public abstract String getDescription(); 
}
class Student extends Person
{
private String major;
public Student(String n, String m)
{
super(n);
major = m;
}
@Override
public String getDescription(){
return "a student majoring in " + major;
}
}