使用JAVA做出简单的小程序学生信息管理系统的代码程序

以下是一个简单的学生信息管理系统的JAVA代码程序：

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

public class StudentManagementSystem {
    // 定义一个集合用于存储学生信息
    private static ArrayList<Student> students = new ArrayList<>();

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

        while (true) {
            System.out.println("欢迎使用学生信息管理系统：");
            System.out.println("1. 添加学生信息");
            System.out.println("2. 修改学生信息");
            System.out.println("3. 删除学生信息");
            System.out.println("4. 查询学生信息");
            System.out.println("5. 显示所有学生信息");
            System.out.println("6. 退出系统");

            System.out.print("请输入要执行的操作：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    addStudent();
                    break;
                case 2:
                    updateStudent();
                    break;
                case 3:
                    deleteStudent();
                    break;
                case 4:
                    queryStudent();
                    break;
                case 5:
                    displayAllStudents();
                    break;
                case 6:
                    System.out.println("谢谢使用！");
                    System.exit(0);
                default:
                    System.out.println("无效的选择，请重新输入！");
                    break;
            }
        }
    }

    // 添加学生信息
    private static void addStudent() {
        Scanner scanner = new Scanner(System.in);

        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();

        System.out.println("请输入学生性别（男/女）：");
        String gender = scanner.next();

        System.out.println("请输入学生学号：");
        int id = scanner.nextInt();

        Student student = new Student(name, age, gender, id);
        students.add(student);

        System.out.println("添加成功！");
    }

    // 修改学生信息
    private static void updateStudent() {
        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入要修改的学生学号：");
        int id = scanner.nextInt();

        for (Student student : students) {
            if (student.getId() == id) {
                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();

                System.out.println("请输入学生性别（男/女）：");
                String gender = scanner.next();

                student.setName(name);
                student.setAge(age);
                student.setGender(gender);

                System.out.println("修改成功！");
                return;
            }
        }

        System.out.println("未找到该学生！");
    }

    // 删除学生信息
    private static void deleteStudent() {
        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入要删除的学生学号：");
        int id = scanner.nextInt();

        for (Student student : students) {
            if (student.getId() == id) {
                students.remove(student);

                System.out.println("删除成功！");
                return;
            }
        }

        System.out.println("未找到该学生！");
    }

    // 查询学生信息
    private static void queryStudent() {
        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入要查询的学生学号：");
        int id = scanner.nextInt();

        for (Student student : students) {
            if (student.getId() == id) {
                System.out.println(student.toString());
                return;
            }
        }

        System.out.println("未找到该学生！");
    }

    // 显示所有学生信息
    private static void displayAllStudents() {
        for (Student student : students) {
            System.out.println(student.toString());
        }
    }
}

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

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

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

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

该程序使用了一个 `Student` 类来表示学生，这个类包含了学生的姓名、年龄、性别和学号等信息，另外还定义了一个学生信息管理系统的主类 `StudentManagementSystem`，该类包含了添加、修改、删除、查询和显示所有学生信息等操作的方法。在 `main` 方法中，使用一个无限循环来不断接收用户的输入，根据用户输入的不同选择来执行相应的操作。