简单的java学生信息管理系统代码

好的，以下是一个简单的Java学生信息管理系统代码示例：

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

public class StudentManagementSystem {
    private ArrayList<Student> students;

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

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

    public void removeStudent(Student student) {
        students.remove(student);
    }

    public void displayAllStudents() {
        for (Student student : students) {
            System.out.println(student);
        }
    }

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

        while (true) {
            System.out.println("请选择操作：");
            System.out.println("1. 添加学生");
            System.out.println("2. 删除学生");
            System.out.println("3. 显示所有学生");
            System.out.println("4. 退出");

            int choice = scanner.nextInt();
            scanner.nextLine();

            switch (choice) {
                case 1:
                    System.out.println("请输入学生姓名：");
                    String name = scanner.nextLine();
                    System.out.println("请输入学生年龄：");
                    int age = scanner.nextInt();
                    scanner.nextLine();
                    System.out.println("请输入学生性别：");
                    String gender = scanner.nextLine();
                    Student student = new Student(name, age, gender);
                    system.addStudent(student);
                    break;
                case 2:
                    System.out.println("请输入要删除的学生姓名：");
                    String removeName = scanner.nextLine();
                    for (Student s : system.students) {
                        if (s.getName().equals(removeName)) {
                            system.removeStudent(s);
                            break;
                        }
                    }
                    break;
                case 3:
                    system.displayAllStudents();
                    break;
                case 4:
                    System.exit(0);
                    break;
                default:
                    System.out.println("无效的选择，请重新输入！");
                    break;
            }
        }
    }
}

class Student {
    private String name;
    private int age;
    private String gender;

    public Student(String name, int age, String gender) {
        this.name = name;
        this.age = age;
        this.gender = gender;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public String getGender() {
        return gender;
    }

    @Override
    public String toString() {
        return "姓名：" + name + "，年龄：" + age + "，性别：" + gender;
    }
}

这个学生信息管理系统可以添加、删除和显示学生信息。在主函数中，使用了一个无限循环来不断接收用户的输入，根据用户的选择执行相应的操作。其中，添加学生和删除学生需要用户输入学生的姓名、年龄和性别，而显示所有学生则直接遍历学生列表并输出每个学生的信息。