Question $1$:

Design and implement a simplified version of an online bookstore management system using Java. The system should support the following functionalities:

$1.$ Adding books to the inventory.

$2.$ Removing books from the inventory.

$3.$ Searching for books by title or author.

$4.$ Displaying the details of a specific book.

$5.$ Updating the stock quantity of a book.

$6.$ Displaying the total number of books in the inventory.

$7.$ Displaying the total number of books sold.

$8.$ Displaying the revenue generated from book sales.

Ensure that your implementation is efficient and well$-$structured using appropriate data structures and algorithms.

Note:

$$ Compose a complete program that includes comments and explanations $($if applicable$)$ ofeach method involved.

$$ Print the output sample.

$$ You are free to include any other functions to the application $($optional$)$