用java编写一个学生信息管理系统

好的，下面是一个简单的学生信息管理系统的JAVA代码实现：

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

public class StudentManagementSystem {
    private ArrayList<Student> students;

    public StudentManagementSystem() {
        students = new ArrayList<Student>();
    }

    public void addStudent(Student student) {
        students.add(student);
    }

    public void removeStudent(int index) {
        students.remove(index);
    }

    public void displayAllStudents() {
        for (int i = 0; i < students.size(); i++) {
            System.out.println(students.get(i).toString());
        }
    }

    public void displayStudent(int index) {
        if (index >= 0 && index < students.size()) {
            System.out.println(students.get(index).toString());
        } else {
            System.out.println("Invalid index.");
        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StudentManagementSystem sms = new StudentManagementSystem();

        while (true) {
            System.out.println("\n********** Student Management System **********");
            System.out.println("1. Add Student");
            System.out.println("2. Remove Student");
            System.out.println("3. Display All Students");
            System.out.println("4. Display Student");
            System.out.println("5. Exit");
            System.out.print("Enter your choice: ");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.print("Enter student name: ");
                    String name = scanner.next();
                    System.out.print("Enter student ID: ");
                    String id = scanner.next();
                    System.out.print("Enter student major: ");
                    String major = scanner.next();
                    Student student = new Student(name, id, major);
                    sms.addStudent(student);
                    System.out.println("Student added successfully.");
                    break;
                case 2:
                    System.out.print("Enter index of student to remove: ");
                    int index = scanner.nextInt();
                    sms.removeStudent(index);
                    System.out.println("Student removed successfully.");
                    break;
                case 3:
                    sms.displayAllStudents();
                    break;
                case 4:
                    System.out.print("Enter index of student to display: ");
                    index = scanner.nextInt();
                    sms.displayStudent(index);
                    break;
                case 5:
                    System.out.println("Goodbye!");
                    System.exit(0);
                default:
                    System.out.println("Invalid choice.");
            }
        }
    }
}

class Student {
    private String name;
    private String id;
    private String major;

    public Student(String name, String id, String major) {
        this.name = name;
        this.id = id;
        this.major = major;
    }

    public String getName() {
        return name;
    }

    public String getId() {
        return id;
    }

    public String getMajor() {
        return major;
    }

    public String toString() {
        return "Name: " + name + ", ID: " + id + ", Major: " + major;
    }
}

该程序实现了以下功能：

1. 添加学生信息
2. 删除学生信息
3. 显示所有学生信息
4. 显示特定学生信息
5. 退出程序

在程序运行时，用户可以选择要执行的操作。添加学生信息时，用户需要输入学生的姓名、学号和专业。删除学生信息时，用户需要输入要删除的学生在列表中的索引。显示特定学生信息时，用户需要输入要显示的学生在列表中的索引。