学生宿舍管理系统，功能拥有姓名查询，学号查询，寝室号查询Java代码

以下是一个简单的学生宿舍管理系统的 Java 代码。其中包括姓名查询、学号查询和寝室号查询功能。

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

public class StudentDormitoryManagementSystem {

    static Scanner input = new Scanner(System.in);
    static ArrayList<Student> students = new ArrayList<Student>();

    public static void main(String[] args) {

        // 添加一些测试数据
        students.add(new Student("张三", "1701010101", "101"));
        students.add(new Student("李四", "1701010102", "101"));
        students.add(new Student("王五", "1701010103", "102"));
        students.add(new Student("赵六", "1701010104", "102"));

        while (true) {
            System.out.println("请选择要进行的操作：");
            System.out.println("1. 姓名查询");
            System.out.println("2. 学号查询");
            System.out.println("3. 寝室号查询");
            System.out.println("4. 退出程序");

            int choice = input.nextInt();

            switch (choice) {
                case 1:
                    searchByName();
                    break;
                case 2:
                    searchByNumber();
                    break;
                case 3:
                    searchByDormitory();
                    break;
                case 4:
                    System.exit(0);
                default:
                    System.out.println("无效的选择，请重新选择。");
                    break;
            }
        }
    }

    public static void searchByName() {
        System.out.print("请输入学生姓名：");
        String name = input.next();
        boolean found = false;
        for (Student student : students) {
            if (student.getName().equals(name)) {
                System.out.println(student.toString());
                found = true;
            }
        }
        if (!found) {
            System.out.println("未找到该学生。");
        }
    }

    public static void searchByNumber() {
        System.out.print("请输入学生学号：");
        String number = input.next();
        boolean found = false;
        for (Student student : students) {
            if (student.getNumber().equals(number)) {
                System.out.println(student.toString());
                found = true;
            }
        }
        if (!found) {
            System.out.println("未找到该学生。");
        }
    }

    public static void searchByDormitory() {
        System.out.print("请输入寝室号：");
        String dormitory = input.next();
        boolean found = false;
        for (Student student : students) {
            if (student.getDormitory().equals(dormitory)) {
                System.out.println(student.toString());
                found = true;
            }
        }
        if (!found) {
            System.out.println("未找到该寝室的学生。");
        }
    }
}

class Student {
    private String name;
    private String number;
    private String dormitory;

    public Student(String name, String number, String dormitory) {
        this.name = name;
        this.number = number;
        this.dormitory = dormitory;
    }

    public String getName() {
        return name;
    }

    public String getNumber() {
        return number;
    }

    public String getDormitory() {
        return dormitory;
    }

    public String toString() {
        return "姓名：" + name + " 学号：" + number + " 寝室号：" + dormitory;
    }
}

这个代码使用了 ArrayList 存储学生信息，并提供了三个查询功能。在 main 方法中，通过一个死循环来让用户不断选择要进行的操作。选择后，通过一个 switch 语句来调用相应的查询方法。每个查询方法都会依次遍历学生信息列表，并找到符合条件的学生信息后输出。如果找不到符合条件的学生，会输出相应的提示信息。