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question:Now that we have the book class, create a Bookstore class that houses a collection of Books. The Bookstore class will include the following methods: - addBook(Book book) - removeBook(Book book) - searchBookByTitle(String title) - searchBookByAuthor(String author) - searchBookByISBN(String isbn) - displayAllBooks()

answer:Here's the `Bookstore` class with the required methods: ```java import java.util.ArrayList; import java.util.List; public class Bookstore { private List<Book> books; public Bookstore() { this.books = new ArrayList<>(); } public void addBook(Book book) { books.add(book); } public void removeBook(Book book) { books.remove(book); } public Book searchBookByTitle(String title) { for (Book book : books) { if (book.getTitle().equalsIgnoreCase(title)) { return book; } } return null; } public List<Book> searchBookByAuthor(String author) { List<Book> booksByAuthor = new ArrayList<>(); for (Book book : books) { if (book.getAuthor().equalsIgnoreCase(author)) { booksByAuthor.add(book); } } return booksByAuthor; } public Book searchBookByISBN(String isbn) { for (Book book : books) { if (book.getIsbn().equals(isbn)) { return book; } } return null; } public void displayAllBooks() { if (books.isEmpty()) { System.out.println(Bookstore is empty.); } else { for (Book book : books) { System.out.println(book.toString()); } } } public static void main(String[] args) { Bookstore bookstore = new Bookstore(); Book book1 = new Book(Java Programming, John Doe, 1234567890); Book book2 = new Book(Python Programming, Jane Doe, 2345678901); Book book3 = new Book(C++ Programming, John Doe, 3456789012); bookstore.addBook(book1); bookstore.addBook(book2); bookstore.addBook(book3); System.out.println(All Books:); bookstore.displayAllBooks(); System.out.println(nBooks by John Doe:); List<Book> booksByAuthor = bookstore.searchBookByAuthor(John Doe); for (Book book : booksByAuthor) { System.out.println(book.toString()); } System.out.println(nBook by ISBN 1234567890:); Book bookByISBN = bookstore.searchBookByISBN(1234567890); if (bookByISBN != null) { System.out.println(bookByISBN.toString()); } else { System.out.println(Book not found.); } bookstore.removeBook(book1); System.out.println(nAll Books after removal:); bookstore.displayAllBooks(); } } ``` This `Bookstore` class uses an `ArrayList` to store the `Book` objects. The `addBook` method adds a `Book` to the collection, while the `removeBook` method removes a `Book` from the collection. The `searchBookByTitle`, `searchBookByAuthor`, and `searchBookByISBN` methods search for `Book` objects based on the specified criteria. The `displayAllBooks` method prints all the `Book` objects in the collection. The `main` method demonstrates how to use these methods.

question:Write example usage with at least 5 different books. ```java public class Bookstore { private List<Book> books; public Bookstore() { this.books = new ArrayList<>(); } // ... rest of your code } ```

answer:Here's an example usage of the `Bookstore` class with at least 5 different books: ```java public class Main { public static void main(String[] args) { Bookstore bookstore = new Bookstore(); Book book1 = new Book(To Kill a Mockingbird, Harper Lee, 9780061120084); Book book2 = new Book(1984, George Orwell, 9780452284234); Book book3 = new Book(Pride and Prejudice, Jane Austen, 9781853260509); Book book4 = new Book(The Great Gatsby, F. Scott Fitzgerald, 9780743273565); Book book5 = new Book(The Catcher in the Rye, J.D. Salinger, 9780316769174); Book book6 = new Book(The Hitchhiker's Guide to the Galaxy, Douglas Adams, 9781400052929); bookstore.addBook(book1); bookstore.addBook(book2); bookstore.addBook(book3); bookstore.addBook(book4); bookstore.addBook(book5); bookstore.addBook(book6); System.out.println(All Books:); bookstore.displayAllBooks(); System.out.println(nBooks by George Orwell:); List<Book> booksByOrwell = bookstore.searchBookByAuthor(George Orwell); for (Book book : booksByOrwell) { System.out.println(book.toString()); } System.out.println(nBook by ISBN 9780061120084:); Book bookByISBN = bookstore.searchBookByISBN(9780061120084); if (bookByISBN != null) { System.out.println(bookByISBN.toString()); } else { System.out.println(Book not found.); } System.out.println(nBook by Title 'Pride and Prejudice':); Book bookByTitle = bookstore.searchBookByTitle(Pride and Prejudice); if (bookByTitle != null) { System.out.println(bookByTitle.toString()); } else { System.out.println(Book not found.); } bookstore.removeBook(book4); System.out.println(nAll Books after removal:); bookstore.displayAllBooks(); } } ``` This example creates a `Bookstore`, adds 6 different books, and demonstrates the usage of the `displayAllBooks`, `searchBookByAuthor`, `searchBookByISBN`, `searchBookByTitle`, and `removeBook` methods.

question:Write a function `add_var(x, y, z)` that adds `x`, `y`, and `z` and returns the result. Your code should pass the following assertions: ```python assert add_var(10, 20, 30) == 60 assert add_var(1, 2, 3) == 6 assert add_var(-1, -2, -3) == -6 ```

answer:Here's how you can write the function using Python: ```python def add_var(x, y, z): result = x + y + z return result ``` This code defines a function named `add_var` that takes three parameters (`x`, `y`, and `z`) and returns the sum of the three using the `+` operator. The `return` statement returns the result of the addition operation.

question:Hi Ananya, Great! I'll see you at the library cafe at 11 AM on Saturday. I'll bring along the books and resources I mentioned, and we can dive deep into the topic. I've been thinking about our discussion at the panel event, and I believe it would be worth exploring the Supreme Court's role in promoting ADR mechanisms in India. It could add an interesting dimension to your paper. Looking forward to our meeting! Best, Raghav

answer:Raghav will meet at the library cafe on Saturday at 11 AM to discuss the research paper. Raghav will bring books and resources and suggests exploring the Supreme Court's role in promoting ADR mechanisms in India.