教材管理系统java代码订书功能

以下是一个简单的教材管理系统Java代码，包含了订书功能：

import java.util.Scanner;

public class TextbookManagementSystem {
    private static int numBooks = 0;
    private static final int MAX_BOOKS = 100;
    private static Book[] books = new Book[MAX_BOOKS];

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

        int choice;
        do {
            System.out.println("请选择要执行的操作：");
            System.out.println("1. 添加教材");
            System.out.println("2. 显示所有教材");
            System.out.println("3. 订购教材");
            System.out.println("4. 退出");
            choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    addBook();
                    break;
                case 2:
                    displayBooks();
                    break;
                case 3:
                    orderBook();
                    break;
                case 4:
                    System.out.println("程序已退出");
                    break;
                default:
                    System.out.println("无效的选项，请重新选择");
            }
        } while (choice != 4);
    }

    private static void addBook() {
        if (numBooks >= MAX_BOOKS) {
            System.out.println("已经添加了最大数量的教材");
            return;
        }

        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入教材名称：");
        String name = scanner.nextLine();

        System.out.println("请输入教材作者：");
        String author = scanner.nextLine();

        System.out.println("请输入教材价格：");
        double price = scanner.nextDouble();

        Book book = new Book(name, author, price);
        books[numBooks] = book;
        numBooks++;

        System.out.println("教材添加成功");
    }

    private static void displayBooks() {
        if (numBooks == 0) {
            System.out.println("没有任何教材");
            return;
        }

        System.out.printf("%-20s %-20s %-10s\n", "教材名称", "教材作者", "价格");
        for (int i = 0; i < numBooks; i++) {
            Book book = books[i];
            System.out.printf("%-20s %-20s %-10.2f\n",
                    book.getName(), book.getAuthor(), book.getPrice());
        }
    }

    private static void orderBook() {
        if (numBooks == 0) {
            System.out.println("没有任何教材");
            return;
        }

        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入要订购的教材名称：");
        String name = scanner.nextLine();

        for (int i = 0; i < numBooks; i++) {
            Book book = books[i];
            if (book.getName().equals(name)) {
                System.out.println("请输入要订购的数量：");
                int quantity = scanner.nextInt();
                book.order(quantity);
                System.out.printf("已成功订购%d本%s\n", quantity, name);
                return;
            }
        }

        System.out.printf("没有找到名称为%s的教材\n", name);
    }
}

class Book {
    private String name;
    private String author;
    private double price;
    private int quantity;

    public Book(String name, String author, double price) {
        this.name = name;
        this.author = author;
        this.price = price;
        this.quantity = 0;
    }

    public String getName() {
        return name;
    }

    public String getAuthor() {
        return author;
    }

    public double getPrice() {
        return price;
    }

    public int getQuantity() {
        return quantity;
    }

    public void order(int quantity) {
        this.quantity += quantity;
    }
}

这个代码实现了一个简单的教材管理系统，其中包含了订书功能。在主菜单中选择“订购教材”选项后，用户可以输入要订购的教材名称和数量，系统会自动更新教材的数量信息。