我想引用另一個引用第一個對象的對象。這會導致什麼問題？

我希望在訪問任何學生時能夠看到課程，並且我還希望在訪問課程時能夠獲得學生名單。我想引用另一個引用第一個對象的對象。這會導致什麼問題？

例子：

public class ClassRoom { 
public String nome; 
public List<Student> students; 
public ClassRoom(String nome){ 
    this.nome=nome; 
}}

和

public class Student { 
public String nome; 
public ClassRoom aClass; 
public Student(String nome, ClassRoom aClass){ 
    this.nome = nome; 
    this.aClass = aClass; 
}}

和

public School(){ 
    ClassRoom c1 = new ClassRoom("English 102"); 
    Student s1 = new Student("Anna White", c1); 
    Student s2 = new Student("Beatrix Blue", c1); 
    Student s3 = new Student("Carlos Brown", c1); 
    Student s4 = new Student("Dayana Green", c1); 
    Student s5 = new Student("Elliot Red", c1); 
    Student s6 = new Student("Jefferson Pink", c1); 

    c1.students = new ArrayList<>(); 
    c1.students.add(s1); 
    c1.students.add(s2); 
    c1.students.add(s3); 
    c1.students.add(s4); 
    c1.students.add(s5); 
    c1.students.add(s6); 

    //example 
    System.out.println(
      c1.students.get(1).aClass.students.get(2).aClass.students.get(3).nome 
    ); 

}}

這是錯誤的這樣的計劃？有沒有更好的辦法？

來源

2017-09-24 Nilson Rodrigues