写一段完整的java学生证管理系统代码

以下是一个简单的Java学生证管理系统代码，包括学生类、学生证类和管理系统类：

import java.util.ArrayList;
import java.util.Scanner;

public class Student {
    private String name;
    private String id;
    private String major;
    private String grade;
    private String phoneNumber;
    
    public Student(String name, String id, String major, String grade, String phoneNumber) {
        this.name = name;
        this.id = id;
        this.major = major;
        this.grade = grade;
        this.phoneNumber = phoneNumber;
    }
    
    public String getName() {
        return name;
    }
    
    public String getId() {
        return id;
    }
    
    public String getMajor() {
        return major;
    }
    
    public String getGrade() {
        return grade;
    }
    
    public String getPhoneNumber() {
        return phoneNumber;
    }
}

class StudentCard {
    private Student student;
    private String cardNumber;
    
    public StudentCard(Student student, String cardNumber) {
        this.student = student;
        this.cardNumber = cardNumber;
    }
    
    public Student getStudent() {
        return student;
    }
    
    public String getCardNumber() {
        return cardNumber;
    }
}

public class StudentCardManagementSystem {
    private ArrayList<StudentCard> studentCards;
    
    public StudentCardManagementSystem() {
        studentCards = new ArrayList<>();
    }
    
    public void addStudentCard(StudentCard studentCard) {
        studentCards.add(studentCard);
    }
    
    public void removeStudentCard(StudentCard studentCard) {
        studentCards.remove(studentCard);
    }
    
    public void displayAllStudentCards() {
        for (StudentCard sc : studentCards) {
            System.out.println("Name: " + sc.getStudent().getName());
            System.out.println("ID: " + sc.getStudent().getId());
            System.out.println("Major: " + sc.getStudent().getMajor());
            System.out.println("Grade: " + sc.getStudent().getGrade());
            System.out.println("Phone Number: " + sc.getStudent().getPhoneNumber());
            System.out.println("Card Number: " + sc.getCardNumber());
            System.out.println();
        }
    }
    
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StudentCardManagementSystem system = new StudentCardManagementSystem();
        
        while (true) {
            System.out.println("1. Add Student Card");
            System.out.println("2. Remove Student Card");
            System.out.println("3. Display All Student Cards");
            System.out.println("4. Exit");
            System.out.print("Please choose an option: ");
            int choice = scanner.nextInt();
            
            if (choice == 1) {
                System.out.print("Please enter student's name: ");
                String name = scanner.next();
                System.out.print("Please enter student's ID: ");
                String id = scanner.next();
                System.out.print("Please enter student's major: ");
                String major = scanner.next();
                System.out.print("Please enter student's grade: ");
                String grade = scanner.next();
                System.out.print("Please enter student's phone number: ");
                String phoneNumber = scanner.next();
                System.out.print("Please enter student's card number: ");
                String cardNumber = scanner.next();
                
                Student student = new Student(name, id, major, grade, phoneNumber);
                StudentCard studentCard = new StudentCard(student, cardNumber);
                system.addStudentCard(studentCard);
                System.out.println("Student card added.");
                System.out.println();
            } else if (choice == 2) {
                System.out.print("Please enter student's card number: ");
                String cardNumber = scanner.next();
                
                for (StudentCard sc : system.studentCards) {
                    if (sc.getCardNumber().equals(cardNumber)) {
                        system.removeStudentCard(sc);
                        System.out.println("Student card removed.");
                        System.out.println();
                        break;
                    }
                }
            } else if (choice == 3) {
                system.displayAllStudentCards();
            } else if (choice == 4) {
                break;
            } else {
                System.out.println("Invalid choice. Please try again.");
                System.out.println();
            }
        }
        
        scanner.close();
    }
}

该程序包括三个类：Student（学生）、StudentCard（学生证）和StudentCardManagementSystem（学生证管理系统）。其中，Student类表示学生，StudentCard类表示学生证，StudentCardManagementSystem类表示学生证管理系统。程序通过控制台进行交互，用户可以选择添加学生证、删除学生证或显示所有学生证。