Java实现图书的借阅功能，不包含数据库

以下是一个基本的Java实现图书的借阅功能的示例代码，不包含数据库：

import java.util.ArrayList;

class Book {
    private String title;
    private String author;
    private boolean isAvailable;

    public Book(String title, String author) {
        this.title = title;
        this.author = author;
        this.isAvailable = true;
    }

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

    public String getAuthor() {
        return this.author;
    }

    public boolean isAvailable() {
        return this.isAvailable;
    }

    public void borrow() {
        if (this.isAvailable) {
            this.isAvailable = false;
        }
    }

    public void returnBook() {
        if (!this.isAvailable) {
            this.isAvailable = true;
        }
    }
}

class Library {
    private ArrayList<Book> books;

    public Library() {
        this.books = new ArrayList<Book>();
    }

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

    public void removeBook(Book book) {
        this.books.remove(book);
    }

    public void borrowBook(String title) {
        for (Book book : this.books) {
            if (book.getTitle().equals(title) && book.isAvailable()) {
                book.borrow();
                System.out.println("You have borrowed \"" + book.getTitle() + "\"");
                return;
            }
        }
        System.out.println("\"" + title + "\" is not available for borrowing");
    }

    public void returnBook(String title) {
        for (Book book : this.books) {
            if (book.getTitle().equals(title) && !book.isAvailable()) {
                book.returnBook();
                System.out.println("You have returned \"" + book.getTitle() + "\"");
                return;
            }
        }
        System.out.println("\"" + title + "\" was not borrowed from this library");
    }
}

public class Main {
    public static void main(String[] args) {
        Book book1 = new Book("The Hobbit", "J.R.R. Tolkien");
        Book book2 = new Book("Harry Potter and the Philosopher's Stone", "J.K. Rowling");
        Library library = new Library();
        library.addBook(book1);
        library.addBook(book2);
        library.borrowBook("The Hobbit");
        library.borrowBook("Harry Potter and the Philosopher's Stone");
        library.borrowBook("The Great Gatsby");
        library.returnBook("The Great Gatsby");
        library.returnBook("The Hobbit");
        library.returnBook("Harry Potter and the Philosopher's Stone");
    }
}

以上示例实现了一个简单的借阅系统，包括 `Book` 和 `Library` 两个类。 `Book` 类表示一本书，包含书名、作者和可用状态，并提供了借阅和归还的方法。 `Library` 类表示一个图书馆，包含了可以借阅的书籍列表，并提供了添加、删除、借阅和归还书籍的方法。 `Main` 类是入口点，用于测试借阅系统的功能。