用java写一个控制台表现的简易宿舍管理系统

好的，下面是一个简单的宿舍管理系统的Java代码，它可以实现添加、修改、删除和查询学生信息的功能：

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

public class DormitoryManagementSystem {
    static ArrayList<Student> studentList = new ArrayList<>();

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

        while (true) {
            System.out.println("欢迎使用宿舍管理系统");
            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. 退出");
            System.out.print("请选择操作：");
            int option = input.nextInt();

            switch (option) {
                case 1:
                    addStudent();
                    break;
                case 2:
                    updateStudent();
                    break;
                case 3:
                    deleteStudent();
                    break;
                case 4:
                    queryStudent();
                    break;
                case 5:
                    System.out.println("谢谢使用！");
                    return;
                default:
                    System.out.println("无效的选项，请重新选择！");
            }
        }
    }

    public static void addStudent() {
        Scanner input = new Scanner(System.in);

        System.out.print("请输入学号：");
        String id = input.next();
        System.out.print("请输入姓名：");
        String name = input.next();
        System.out.print("请输入性别（男/女）：");
        String gender = input.next();
        System.out.print("请输入年龄：");
        int age = input.nextInt();
        System.out.print("请输入宿舍号：");
        String dormitory = input.next();

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

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

    public static void updateStudent() {
        Scanner input = new Scanner(System.in);

        System.out.print("请输入要修改的学生学号：");
        String id = input.next();

        for (int i = 0; i < studentList.size(); i++) {
            Student student = studentList.get(i);
            if (student.getId().equals(id)) {
                System.out.print("请输入新的姓名（原姓名为 " + student.getName() + "）：");
                String name = input.next();
                System.out.print("请输入新的性别（原性别为 " + student.getGender() + "）：");
                String gender = input.next();
                System.out.print("请输入新的年龄（原年龄为 " + student.getAge() + "）：");
                int age = input.nextInt();
                System.out.print("请输入新的宿舍号（原宿舍号为 " + student.getDormitory() + "）：");
                String dormitory = input.next();

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

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

        System.out.println("该学生不存在！");
    }

    public static void deleteStudent() {
        Scanner input = new Scanner(System.in);

        System.out.print("请输入要删除的学生学号：");
        String id = input.next();

        for (int i = 0; i < studentList.size(); i++) {
            Student student = studentList.get(i);
            if (student.getId().equals(id)) {
                studentList.remove(i);
                System.out.println("删除成功！");
                return;
            }
        }

        System.out.println("该学生不存在！");
    }

    public static void queryStudent() {
        Scanner input = new Scanner(System.in);

        System.out.print("请输入要查询的学生学号：");
        String id = input.next();

        for (Student student : studentList) {
            if (student.getId().equals(id)) {
                System.out.println("学号\t姓名\t性别\t年龄\t宿舍号");
                System.out.println(student);
                return;
            }
        }

        System.out.println("该学生不存在！");
    }
}

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

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

    public String getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getGender() {
        return gender;
    }

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

    public int getAge() {
        return age;
    }

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

    public String getDormitory() {
        return dormitory;
    }

    public void setDormitory(String dormitory) {
        this.dormitory = dormitory;
    }

    @Override
    public String toString() {
        return id + "\t" + name + "\t" + gender + "\t" + age + "\t" + dormitory;
    }
}

以上就是一个简易的宿舍管理系统的Java代码，可以用控制台进行交互操作。