Let's Practice!

Your task is to implement a library management system in Java. A Book class has already been created for you with all the fields, setters, and getters. You can familiarize yourself with it in the Book class.

Also, a LibraryDemo class has been created for you, which tests all the methods from the Library class.

Create a class Library that represents a collection of books. Use an ArrayList to store instances of the Book class.

Implement the following methods in the Library class:

• addBook(Book book): Adds a book to the library.
• removeBookById(int id): Removes a book from the library based on the unique identifier.
• findBooksByAuthor(String author): Returns a list of books by the specified author.
• findBooksPublishedAfterYear(int year): Returns a list of books published after the specified year.
• displayAllBooks(): Displays information about all the books in the library on the screen.

After that, you need to go to the LibraryDemo class and run it. It will test the correctness of the methods you implemented.

Task Execution Guide:

Your main task is to implement the Library class, specifically its methods. Firstly, you need to create a list of books, which will be your library. Make sure you made this list public, it's important!

• Start with the simplest method – the method to add a book to the library. Here, you simply need to use the add() method on the list you created earlier.

• Proceed with the removeBookById() method, which is a bit more complex than it seems. You cannot simply remove a book using remove(id) since each book has a unique identifier specified in the class. Therefore, you need to create a separate list of books to be removed. Then, iterate through the list of books and find the book by ID using a condition like if(book.getId() == id). Afterward, use the removeAll() method with the list of books to be removed.

• The findBookByAuthor() method is almost identical to the previous one; I'll leave this one for you to contemplate.

• The findBooksPublishedAfterYear() method is similar to the previous one; you just need to change the condition.

• In the displayAllBooks() method, simply use System.out.println().

Don't forget that in some methods, you need to return lists. A list, like any other object, can be a return value.