使用java编写一个基于控制台的购书系统包括书的编号，书名，单价，库存

好的，我们可以创建一个简单的基于控制台的购书系统，使用Java语言。这个系统可以包含Book类表示书籍，以及相关的操作如添加、查看和购买等。以下是简化的代码结构：

// 定义Book类
class Book {
    private int bookId;
    private String title;
    private double price;
    private int stock;

    public Book(int id, String name, double price, int stock) {
        this.bookId = id;
        this.title = name;
        this.price = price;
        this.stock = stock;
    }

    // 获取和设置属性的方法
    public int getBookId() { return bookId; }
    public void setBookId(int bookId) { this.bookId = bookId; }

    public String getTitle() { return title; }
    public void setTitle(String title) { this.title = title; }

    public double getPrice() { return price; }
    public void setPrice(double price) { this.price = price; }

    public int getStock() { return stock; }
    public void setStock(int stock) { this.stock = stock; }
}

// 控制台操作类
public class ConsoleShop {
    private List<Book> books = new ArrayList<>();

    // 添加书籍
    public void addBook(Book book) {
        books.add(book);
    }

    // 查看书籍信息
    public void viewBooks() {
        for (Book book : books) {
            System.out.println("书编号: " + book.getBookId() +
                               ", 书名: " + book.getTitle() +
                               ", 单价: " + book.getPrice() +
                               ", 库存: " + book.getStock());
        }
    }

    // 购买书籍
    public void purchaseBook(int bookId, int quantity) {
        for (Book book : books) {
            if (book.getBookId() == bookId && book.getStock() >= quantity) {
                book.setStock(book.getStock() - quantity);
                System.out.println("已购买 " + quantity + "本《" + book.getTitle() + "》");
            } else {
                System.out.println("无法购买，该书无货或库存不足");
            }
        }
    }
}

// 主程序入口
public static void main(String[] args) {
    ConsoleShop shop = new ConsoleShop();
    // 初始化并添加书籍...
    shop.addBook(new Book(1, "Java基础", 50.0, 20));
    // ...其他书籍

    // 操作系统示例
    shop.viewBooks(); // 显示所有书籍信息
    shop.purchaseBook(1, 5); // 购买书籍
}