以下是一个简单的Java实现学生管理系统的代码，使用ArrayList集合来存储学生信息。
import java.util.ArrayList;import java.util.Scanner;class Student { private String name; private int age; private String id; public Student(String name, int age, String id) { this.name = name; this.age = age; this.id = id; } public String getName() { return name; } public int getAge() { return age; } public String getId() { return id; }}public class StudentManagementSystem { private ArrayList<Student> students; public StudentManagementSystem() { students = new ArrayList<>(); } public void addStudent(Student student) { students.add(student); } public void removeStudent(String id) { for (int i = 0; i < students.size(); i++) { if (students.get(i).getId().equals(id)) { students.remove(i); break; } } } public void displayStudents() { for (Student student : students) { System.out.println("Name: " + student.getName()); System.out.println("Age: " + student.getAge()); System.out.println("ID: " + student.getId()); System.out.println("------------------------"); } } public static void main(String[] args) { StudentManagementSystem system = new StudentManagementSystem(); Scanner scanner = new Scanner(System.in); while (true) { System.out.println("1. Add Student"); System.out.println("2. Remove Student"); System.out.println("3. Display Students"); System.out.println("4. 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 age: "); int age = scanner.nextInt(); System.out.print("Enter student ID: "); String id = scanner.next(); Student student = new Student(name, age, id); system.addStudent(student); break; case 2: System.out.print("Enter student ID to remove: "); String removeId = scanner.next(); system.removeStudent(removeId); break; case 3: system.displayStudents(); break; case 4: System.exit(0); break; default: System.out.println("Invalid choice. Please try again."); break; } } }}这个程序中，Student类表示学生，包含姓名、年龄和学号属性。StudentManagementSystem类表示学生管理系统，包含一个ArrayList集合来存储学生信息。
在main方法中，使用一个无限循环来接受用户的输入操作。用户可以选择添加学生、删除学生、显示学生列表或退出程序。根据用户的选择，调用StudentManagementSystem类中的相应方法来执行相应的操作。
注意：这只是一个简单的示例，没有进行输入验证和错误处理。在实际使用中，可能需要添加更多的功能和逻辑来满足实际需求。
