使用java写一个基于控制台的购书系统

在Java中编写一个简单的基于控制台的购书系统，可以模拟用户购买书籍的过程。这里是一个简化的示例，主要包括以下几个步骤：

import java.util.Scanner;

class Book {
    private String title;
    private double price;

    public Book(String title, double price) {
        this.title = title;
        this.price = price;
    }

    public void displayBookInfo() {
        System.out.println("Title: " + title);
        System.out.println("Price: " + price);
    }
}

class ShoppingCart {
    private List<Book> books = new ArrayList<>();

    public void addBook(Book book) {
        books.add(book);
    }

    public void checkout(double totalBudget) {
        double totalPrice = 0;
        for (Book book : books) {
            totalPrice += book.getPrice();
        }
        if (totalPrice <= totalBudget) {
            System.out.println("Purchase successful. Total cost: " + totalPrice);
        } else {
            System.out.println("Insufficient budget. Total cost: " + totalPrice);
        }
    }
}

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

        System.out.println("Welcome to Console Book Store!");
        System.out.print("Enter your name: ");
        String name = scanner.nextLine();

        while (true) {
            System.out.println("\n1. Add a book");
            System.out.println("2. Checkout");
            System.out.print("Choose an option: ");
            int choice = scanner.nextInt();
            scanner.nextLine(); // Consume newline

            switch (choice) {
                case 1:
                    System.out.print("Enter book title: ");
                    String title = scanner.nextLine();
                    System.out.print("Enter book price: ");
                    double price = scanner.nextDouble();
                    Book book = new Book(title, price);
                    // Assuming you have access to a database or list of available books here
                    // For simplicity, we'll just hardcode one
                    Book availableBook = new Book("Book Title", 10.99); // Example book
                    ShoppingCart cart = new ShoppingCart();
                    cart.addBook(availableBook); // Assume the book is added to cart
                    break;
                case 2:
                    System.out.print("Enter your budget: ");
                    double budget = scanner.nextDouble();
                    cart.checkout(budget);
                    break;
                default:
                    System.out.println("Invalid choice. Please try again.");
            }
        }
    }
}

在这个例子中，我们创建了`Book`类表示书籍，`ShoppingCart`类用于存储并计算总价，而`ConsoleBookStore`类则是主入口，处理用户的输入。用户可以选择添加书籍到购物车或结账。