一个简单的客车售票系统Java

下面是一个简单的客车售票系统的 Java 实现，其中包括了车辆信息、座位信息、购票、退票等功能。

import java.util.Scanner;

public class BusTicketSystem {
    static String[] buses = {"K123", "K456", "K789"};  // 车辆信息
    static int[][] seats = {{1,2,3,4,5,6,7,8,9,10},   // 座位信息
                            {1,2,3,4,5,6,7,8,9,10},
                            {1,2,3,4,5,6,7,8,9,10}};
    static int[][] tickets = new int[buses.length][seats[0].length];  // 票务信息

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

        while (true) {
            System.out.println("请选择操作：1.购票 2.退票 3.退出系统");
            int option = sc.nextInt();

            if (option == 1) {
                System.out.println("请输入车次（K123, K456, K789）：");
                String bus = sc.next();
                int busIndex = -1;
                for (int i = 0; i < buses.length; i++) {
                    if (buses[i].equals(bus)) {
                        busIndex = i;
                        break;
                    }
                }
                if (busIndex == -1) {
                    System.out.println("车次输入错误！");
                    continue;
                }

                System.out.println("请输入座位号（1-10）：");
                int seat = sc.nextInt();
                if (seat < 1 || seat > seats[0].length) {
                    System.out.println("座位号输入错误！");
                    continue;
                }

                if (tickets[busIndex][seat-1] == 1) {
                    System.out.println("该座位已被购买！");
                    continue;
                }

                tickets[busIndex][seat-1] = 1;
                System.out.println("购票成功！");
            } else if (option == 2) {
                System.out.println("请输入车次（K123, K456, K789）：");
                String bus = sc.next();
                int busIndex = -1;
                for (int i = 0; i < buses.length; i++) {
                    if (buses[i].equals(bus)) {
                        busIndex = i;
                        break;
                    }
                }
                if (busIndex == -1) {
                    System.out.println("车次输入错误！");
                    continue;
                }

                System.out.println("请输入座位号（1-10）：");
                int seat = sc.nextInt();
                if (seat < 1 || seat > seats[0].length) {
                    System.out.println("座位号输入错误！");
                    continue;
                }

                if (tickets[busIndex][seat-1] == 0) {
                    System.out.println("该座位未被购买！");
                    continue;
                }

                tickets[busIndex][seat-1] = 0;
                System.out.println("退票成功！");
            } else if (option == 3) {
                System.out.println("谢谢使用！");
                break;
            } else {
                System.out.println("输入错误，请重新输入！");
            }
        }

        sc.close();
    }
}

上面的代码中，我们使用了一个二维数组 `seats` 来存储每个车辆的座位信息，使用一个二维数组 `tickets` 来存储每个座位的票务信息。在购票和退票时，我们需要先输入车次和座位号，然后判断该座位是否已被购买或未被购买，最后更新票务信息。