用Java写一个汽车销售系统

好的，我可以提供一个简单的汽车销售系统的Java代码框架，你可以根据自己的需要进行修改和完善。这个系统包括以下几个类：

1. Car类：定义汽车的属性，如品牌、型号、颜色、价格等。

public class Car {
    private String brand;
    private String model;
    private String color;
    private double price;

    public Car(String brand, String model, String color, double price) {
        this.brand = brand;
        this.model = model;
        this.color = color;
        this.price = price;
    }

    // 省略getter和setter方法
}

2. Customer类：定义顾客的属性，如姓名、电话号码、地址等。

public class Customer {
    private String name;
    private String phone;
    private String address;

    public Customer(String name, String phone, String address) {
        this.name = name;
        this.phone = phone;
        this.address = address;
    }

    // 省略getter和setter方法
}

3. SalesSystem类：定义销售系统的主要功能，包括添加汽车、删除汽车、查询汽车、售出汽车等。

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

public class SalesSystem {
    private List<Car> cars = new ArrayList<>();
    private List<Customer> customers = new ArrayList<>();

    // 添加汽车
    public void addCar(Car car) {
        cars.add(car);
    }

    // 删除汽车
    public void removeCar(Car car) {
        cars.remove(car);
    }

    // 查询汽车
    public List<Car> queryCars(String brand, String model, String color, double price) {
        List<Car> result = new ArrayList<>();
        for (Car car : cars) {
            if (brand != null && !car.getBrand().equals(brand)) {
                continue;
            }
            if (model != null && !car.getModel().equals(model)) {
                continue;
            }
            if (color != null && !car.getColor().equals(color)) {
                continue;
            }
            if (price > 0 && car.getPrice() > price) {
                continue;
            }
            result.add(car);
        }
        return result;
    }

    // 售出汽车
    public void sellCar(Car car, Customer customer) {
        cars.remove(car);
        customers.add(customer);
    }

    // 省略其他功能方法
}

4. Main类：程序入口，提供菜单供用户选择功能。用户可以选择添加汽车、删除汽车、查询汽车、售出汽车等操作。

import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        SalesSystem system = new SalesSystem();
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请选择操作：");
            System.out.println("1. 添加汽车");
            System.out.println("2. 删除汽车");
            System.out.println("3. 查询汽车");
            System.out.println("4. 售出汽车");
            System.out.println("5. 退出");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    System.out.println("请输入汽车品牌：");
                    String brand = scanner.next();
                    System.out.println("请输入汽车型号：");
                    String model = scanner.next();
                    System.out.println("请输入汽车颜色：");
                    String color = scanner.next();
                    System.out.println("请输入汽车价格：");
                    double price = scanner.nextDouble();
                    system.addCar(new Car(brand, model, color, price));
                    break;
                case 2:
                    System.out.println("请输入汽车品牌：");
                    String brand2 = scanner.next();
                    System.out.println("请输入汽车型号：");
                    String model2 = scanner.next();
                    System.out.println("请输入汽车颜色：");
                    String color2 = scanner.next();
                    System.out.println("请输入汽车价格：");
                    double price2 = scanner.nextDouble();
                    List<Car> cars = system.queryCars(brand2, model2, color2, price2);
                    if (cars.size() == 0) {
                        System.out.println("未找到符合条件的汽车");
                    } else {
                        System.out.println("请选择要删除的汽车：");
                        for (int i = 0; i < cars.size(); i++) {
                            System.out.println((i + 1) + ". " + cars.get(i));
                        }
                        int index = scanner.nextInt();
                        system.removeCar(cars.get(index - 1));
                        System.out.println("汽车已删除");
                    }
                    break;
                case 3:
                    System.out.println("请输入汽车品牌（可选）：");
                    String brand3 = scanner.next();
                    System.out.println("请输入汽车型号（可选）：");
                    String model3 = scanner.next();
                    System.out.println("请输入汽车颜色（可选）：");
                    String color3 = scanner.next();
                    System.out.println("请输入最高价格（可选）：");
                    double price3 = scanner.nextDouble();
                    List<Car> cars2 = system.queryCars(brand3, model3, color3, price3);
                    if (cars2.size() == 0) {
                        System.out.println("未找到符合条件的汽车");
                    } else {
                        System.out.println("查询结果如下：");
                        for (Car car : cars2) {
                            System.out.println(car);
                        }
                    }
                    break;
                case 4:
                    System.out.println("请输入汽车品牌：");
                    String brand4 = scanner.next();
                    System.out.println("请输入汽车型号：");
                    String model4 = scanner.next();
                    System.out.println("请输入汽车颜色：");
                    String color4 = scanner.next();
                    System.out.println("请输入汽车价格：");
                    double price4 = scanner.nextDouble();
                    List<Car> cars3 = system.queryCars(brand4, model4, color4, price4);
                    if (cars3.size() == 0) {
                        System.out.println("未找到符合条件的汽车");
                    } else {
                        System.out.println("请选择要售出的汽车：");
                        for (int i = 0; i < cars3.size(); i++) {
                            System.out.println((i + 1) + ". " + cars3.get(i));
                        }
                        int index = scanner.nextInt();
                        System.out.println("请输入顾客姓名：");
                        String name = scanner.next();
                        System.out.println("请输入顾客电话：");
                        String phone = scanner.next();
                        System.out.println("请输入顾客地址：");
                        String address = scanner.next();
                        system.sellCar(cars3.get(index - 1), new Customer(name, phone, address));
                        System.out.println("汽车已售出");
                    }
                    break;
                case 5:
                    System.exit(0);
                default:
                    System.out.println("无效操作，请重新选择");
                    break;
            }
        }
    }
}

以上就是一个简单的汽车销售系统的Java代码框架，你可以根据自己的需要进行修改和完善。