java写一个订房系统

好的，下面是一个简单的Java订房系统的实现示例：

import java.util.Scanner;

public class HotelBookingSystem {
    private static int[][] rooms = new int[3][10]; // 三层楼，每层10个房间
    private static int[] prices = {200, 300, 400}; // 每个房间的价格，分别对应三个等级的房间

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

        while (true) {
            System.out.println("欢迎使用酒店订房系统，请输入相应的数字选择服务：");
            System.out.println("1. 查看房间列表");
            System.out.println("2. 预订房间");
            System.out.println("3. 退订房间");
            System.out.println("4. 退出系统");

            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    printRooms();
                    break;
                case 2:
                    bookRoom(scanner);
                    break;
                case 3:
                    cancelRoom(scanner);
                    break;
                case 4:
                    System.out.println("感谢使用酒店订房系统，再见！");
                    System.exit(0);
                    break;
                default:
                    System.out.println("无效的选择，请重新输入！");
                    break;
            }
        }
    }

    // 输出所有房间的状态
    private static void printRooms() {
        System.out.println("所有房间的状态如下：");
        for (int i = 0; i < rooms.length; i++) {
            System.out.println("第" + (i + 1) + "层：");
            for (int j = 0; j < rooms[i].length; j++) {
                System.out.print("房间" + (j + 1) + "：" + (rooms[i][j] == 0 ? "空闲" : "已预订") + "\t");
            }
            System.out.println();
        }
    }

    // 预订房间
    private static void bookRoom(Scanner scanner) {
        System.out.println("请输入要预订的房间号（格式为：层数 房间号）：");
        int floor = scanner.nextInt() - 1;
        int roomNumber = scanner.nextInt() - 1;

        if (floor < 0 || floor >= rooms.length || roomNumber < 0 || roomNumber >= rooms[floor].length) {
            System.out.println("无效的房间号，请重新输入！");
            return;
        }

        if (rooms[floor][roomNumber] == 1) {
            System.out.println("该房间已被预订，请重新选择房间！");
        } else {
            System.out.println("请选择要预订的房间等级（1-经济型，2-舒适型，3-豪华型）：");
            int level = scanner.nextInt() - 1;

            if (level < 0 || level >= prices.length) {
                System.out.println("无效的房间等级，请重新输入！");
            } else {
                rooms[floor][roomNumber] = 1;
                System.out.println("房间预订成功，房间号为：" + (floor + 1) + "-" + (roomNumber + 1) + "，房间等级为：" + (level + 1) + "，价格为：" + prices[level]);
            }
        }
    }

    // 退订房间
    private static void cancelRoom(Scanner scanner) {
        System.out.println("请输入要退订的房间号（格式为：层数 房间号）：");
        int floor = scanner.nextInt() - 1;
        int roomNumber = scanner.nextInt() - 1;

        if (floor < 0 || floor >= rooms.length || roomNumber < 0 || roomNumber >= rooms[floor].length) {
            System.out.println("无效的房间号，请重新输入！");
            return;
        }

        if (rooms[floor][roomNumber] == 0) {
            System.out.println("该房间未被预订，请重新选择房间！");
        } else {
            rooms[floor][roomNumber] = 0;
            System.out.println("房间退订成功，房间号为：" + (floor + 1) + "-" + (roomNumber + 1));
        }
    }
}

这个订房系统基于命令行界面，提供了查看房间列表、预订房间、退订房间等功能。房间列表以矩阵的形式输出，每个房间有三个等级可供选择。房间的预订和退订都需要输入房间号，层数和房间号都是从1开始计数。