将人员添加到建筑物时，引用学校 Class 的最合适方式是什么？

Question

我需要在计算机科学的每个练习中应用 OOP 概念 class。练习 7 向我们介绍了类和对象。我们必须创建一个名为 Person 的 class 并对其进行编程，以便从 10 人的一维数组中添加、删除和显示一个人。接下来是练习 8 和 9，其中我们介绍了继承和封装，我们必须创建一个继承自 Person 的 Student class、一个继承自 Person 的 Teacher class 和一个 Principal class 将从 Person 继承。我必须能够添加、删除和显示 students/teachers 的列表，当我完成这个时，它工作得很好。

我们的下一个任务是练习 10，它向我们介绍了多态和转换。我们必须创建一个学校 class，其中包含学校名称、地址和人员列表（最多 300）。我得设计一个方法addPersonToBuilding(Person person)，然后修改我之前的程序，让人在创建的时候就加入学校。我的程序（主要方法）应该只需要引用学校 class。

在创建方法 addPersonToBuilding 时，我相信我d add the student and teacher instance in the people array. I会创建一个方法来将 student/teacher 添加到学校，并在这些方法中将 student/teacher 添加到人员中大批。 addPersonToBulding 方法将引用 add student/teacher to school 方法。每当用户选择在 main 方法中添加 student/teacher 时，将调用添加 PersonToBuliding 的方法。

public class School extends Person {
 
 private String schoolName;
 private String address;
 private String name; 
 private School people[] = new School[300];

 public School() { 
  this.schoolName = "Not Available";
  this.address = "Not Available";
  this.name = "Not Available"; 
 }//end of School()
 
 public School (String schoolName, String address, String prinicpalName) { 
  this.schoolName = schoolName;
  this.address = address;
  this.name = prinicpalName; 
 }//end of School(schoolName, address)
 
 public School (String schoolName, String address, String prinicpalName, School[] people) {  
  this.schoolName = schoolName;
  this.address = address;
  this.name = prinicpalName;
  this.people = people; 
 }//end of School(schoolName, address, people) 
 
 // ---------  include setters and getter methods to access private data ----- 
  
  // I won`t include this because that`s not really an issue I`m having with
 //I`m assuming everyone, including me, knows how they are and what they do 
 
 public boolean addPersonToBuilding (PersonCopy P) { 
  boolean personAdded = false;
  int index = 0;
  return personAdded; 
 }//addPersonToBuilding()
 
 // Create a method to add a student to the school  
 public boolean addStudentToSchool (Student student) { 
  boolean studentAdded = false;
  int index = 0; 
  return studentAdded;  
 }//end of addStudentToSchool(student)
 
 // Create a method to add a teacher to the school 
 public boolean addTeacherToSchool (Teacher teacher) { 
  boolean teacherAdded = false;
  int index = 0;  
  if (addTeacherToSchool(teacher)) {
  }
  return teacherAdded; 
 }//end of addTeacherToSchool(teacher) 
}//end of class School

我知道我需要做什么，但我在代码上方所做的假设没有t speak "on the right track" to me. I feel like Im 遗漏一些细节。

Answer 1

给定 Teacher 和 Student 继承自 Person，您创建了以下学校 class：

public School(){
ArrayList<Person> people = new ArrayList<Person>();

public void addPeople(Person p){
  people.add(p);
}

我认为 Main 函数的示例可以帮助您解决问题：

public static void main(String[] args){

   School school = new School();
   Teacher t1 = new Teacher();
   Student s1 = new Student();

   school.addPeople(t1);
   school.addPeople(s1);

   //Polymorphism
   for(Person p: school.getPeople()){
       p.getName(); /* Here the function will be
                       called depending if its a Teacher or Student at runtime */
    }


}

将人员添加到建筑物时，引用学校 Class 的最合适方式是什么？

What Would Be the Most Appropriate Way to Refer to a School Class When Adding People to a Building?

java

oop

polymorphism

inheritance

abstract-class