Library.java

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

public class Library {
    private List<Book> books;
    private List<User> users;

    public Library() {
        books = new ArrayList<>();
        users = new ArrayList<>();
    }

    // Add a book to the library
    public void addBook(Book book) {
        books.add(book);
        System.out.println("Book added: " + book.getTitle());
    }

    // Add a user to the library.
    public void addUser(User user) {
        users.add(user);
        System.out.println("User added: " + user.name);
    }

    // Search for a book by title
    public Book searchBook(String title) {
        for (Book book : books) {
            if (book.getTitle().equalsIgnoreCase(title)) {
                return book;
            }
        }
        return null;
    }

    // Display all books
    public void displayBooks() {
        System.out.println("Library books:");
        for (Book book : books) {
            System.out.println(book);
        }
    }
}