java - 如何用java创建学生名册

Question

我有一个家庭作业问题，如下所示:

(20 pts) Create a Student class with the following:

• A private String variable named “name” to store the student’s name
• A private integer variable named “UFID” that contains the unique ID number for this student
• A private String variable named “DOB” to store the student’s date of birth
• A private integer class variable named numberOfStudents that keeps track of the number of students that have been created so far
• A public constructor Student(String name, int UFID, String dob)

• Several public get/set methods for all the properties

  getName/setName
  getUFID/setUFID
  getDob/setDob
  

• Write a test program, roster.java, that keeps a list of current enrolled students. It should have methods to be able to enroll a new student and drop an existing student.

我并不是要求任何人为我完成这项作业，我只是真的需要一些一般性指导。我认为我的 Student 类制作得很好，但我无法确切地知道 addStudent() 和 dropStudent() 方法应该做什么do - 应该将一个元素添加到数组或其他东西中，还是只是增加学生的数量？到目前为止我的代码看起来像这样。

public class Student {
    private String name;
    private int UFID;
    private String DOB;
    private static int numberOfStudents;

    public Student(String name, int UFID, String DOB) {
        this.name = name;
        this.UFID = UFID;
        this.DOB = DOB;
    }

    public String getDOB() {
        return DOB;
    }

    public void setDOB(String dOB) {
        DOB = dOB;
    }

    public int getUFID() {
    return UFID; }

    public void setUFID(int uFID) {
    UFID = uFID; }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getNumberOfStudents() {
        return numberOfStudents;
    }

    public void setNumberOfStudents(int numberOfStudents) {
        Student.numberOfStudents = numberOfStudents;
    }

    public static void addStudent(String name, int UFID, String DOB) {
        numberOfStudents++;
    }

    public static void dropStudent(String name) {
        numberOfStudents--;
    }
}

当我完成此工作时，任何指导将不胜感激。

Answer 1

作业是自己写的:您需要一个拥有并维护学生集合的名册类:

public class Roster {
    private Set<Student> roster = new HashSet<Student>();

    public void addStudent(Student s) { this.roster.add(s); }

    public void removeStudent(Student s) { this.roster.remove(s); }
}