java用面对对象的方式做一个自助车辆管理系统

要使用 Java 的面向对象思想构建一个简单的自助车辆管理系统的框架，我们可以设计以下几个关键类：

1. **车辆类(Vehicle)**:
- 属性: 车牌号(plateNumber), 车型(model), 颜色(color), 状态(status)(例如：可用、已租)
- 方法: 获取信息(getInfo()), 租车(reserve()), 归还车(returnCar())

public class Vehicle {
    private String plateNumber;
    private String model;
    private String color;
    private String status;

    public Vehicle(String plateNumber, String model, String color) {
        this.plateNumber = plateNumber;
        this.model = model;
        this.color = color;
        this.status = "Available";
    }

    public String getInfo() {
        return "车牌号: " + plateNumber + ", 模型: " + model + ", 颜色: " + color + ", 状态: " + status;
    }

    public boolean reserve() {
        // 检查车辆状态并更新
        if ("Available".equals(status)) {
            status = "Reserved";
            return true;
        } else {
            return false;
        }
    }

    public void returnCar() {
        if ("Reserved".equals(status)) {
            status = "Available";
        } else {
            System.out.println("车辆未处于已租状态，无法归还");
        }
    }
}

2. **租车站(Classroom)**:
- 属性: 车辆集合(vehicleList)
- 方法: 添加车辆(addVehicle), 租车租赁(rentVehicle), 更新车辆状态(updateStatus)

import java.util.ArrayList;
import java.util.List;

public class CarRentalStation {
    private List<Vehicle> vehicleList;

    public CarRentalStation() {
        vehicleList = new ArrayList<>();
    }

    public void addVehicle(Vehicle vehicle) {
        vehicleList.add(vehicle);
    }

    public Vehicle rentVehicle(String plateNumber) {
        for (Vehicle vehicle : vehicleList) {
            if (vehicle.getPlateNumber().equals(plateNumber) && vehicle.reserve()) {
                return vehicle;
            }
        }
        throw new IllegalArgumentException("车辆不存在或已被租借");
    }

    public void updateStatus(String plateNumber, String newStatus) {
        for (Vehicle vehicle : vehicleList) {
            if (vehicle.getPlateNumber().equals(plateNumber)) {
                vehicle.returnCar(); // 先还原，再更新
                vehicle.setStatus(newStatus);
                break;
            }
        }
    }
}

3. **主程序(Main Class)**:
- 创建车辆和租车站实例，进行操作

public class Main {
    public static void main(String[] args) {
        CarRentalStation station = new CarRentalStation();
        Vehicle car1 = new Vehicle("ABC123", "Toyota", "Blue");

        // 添加车辆
        station.addVehicle(car1);

        // 租车
        try {
            Vehicle rentedCar = station.rentVehicle("ABC123");
            System.out.println(rentedCar.getInfo());
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        }

        // 归还车辆
        station.updateStatus("ABC123", "Available");
    }
}

这只是一个基础的框架，实际系统可能需要添加用户认证、数据库集成、错误处理等功能。