Question

Write a program for the management of a bookstore in java, WITHOUT THE USE OF BOOK CLASS, just arrays, strings, loops, etc.

Overview; First menu

1. List all books

2. Search all books

3. Purchase books

4. Exit

If option 1 is chosen: List all books by Title, Author, Price, Copies, Category within a group of arrays

If option 2 is chosen: Search all books by Title, Author, Price, Copies, Category

If option 3 is chosen: List books, List shopping cart (current selected books), If book has zero copies display "This book is not in stock", otherwise Update shopping cart and display "Pay to complete the purchase", update book list

If option 4 is chosen: terminate program

Answer 1

please do like

Answer:

Code:

import java.util.Scanner;
import java.util.ArrayList;
public class MyBookstore {
public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    Bookstore myBkStore = new Bookstore();

    int y = 0;
    int user_choice = 2;
    boolean quit = false;

    do {
        //display menu to user
        //ask user for his choice and validate it (make sure it is between 1 and 6)
        System.out.println();
        System.out.println("1) Add a book to the stock");
        System.out.println("2) Sell a book in stock");
        System.out.println("3) List the titles of all the books in stock (in the Bookstore object)");
        System.out.println("4) List all the information about the books in stock (in the Bookstore object)");
        System.out.println("5) Print out the gross income of the bookstore");
        System.out.println("6) Quit");
        System.out.println();
        System.out.print("Enter choice [1-6]: ");
        user_choice = s.nextInt();
        switch (user_choice) {
            case 1: System.out.println("Enter a book title");

                    String bt = s.next();           //stores title of book user enters in

                    if (myBkStore.inStock(title, y))
                    {
                        System.out.println("How many more to add to the stock");
                        y = s.nextInt();
                        myBkStore.addBookQuantity(bt, y);
                    }
                    else
                    {
                        System.out.println("Enter the amount of pages of the book: ");
                        int pages = s.nextInt();
                        System.out.println("Enter the price of the book: ");
                        double price = s.nextDouble();
                        System.out.println("Enter the quantity to add: ");
                        int quant = s.nextInt();
                        //myBkStore.Book(bt, pages, price, quant);
                        myBkStore.addNewBook(book);
                    }

                    break;
            case 2: System.out.println("Enter book title to buy: ");
                    String bookT = s.next();
                    myBkStore.sellBook(title, y);
                    break;
            case 3: myBkStore.listTitles();
                    break;
            case 4: myBkStore.listBooks();
                    break;
            case 5: myBkStore.getIncome();
                    break;
            case 6: System.out.println("Thanks for coming");
                    quit = true;
                    break;
            default: System.out.println("\nInvalid Choice");
        }
}
while (!quit);
}

static class Bookstore {
private Book[] books; // all the books in this bookstore
private int totalBooks; // the number of books in this bookstore
    private double grossIncome; //the gross income of the bookstore (will be incremented when books are sold)

// Constructor: A new Bank object initially doesn’t contain any accounts.
public Bookstore() {
    books = new Book[100];
    totalBooks = 0;
    grossIncome = 0;
    }

// Creates a new bank account using the customer name and the opening balance given as parameters
// and returns the account number of this new account. It also adds this account into the account list
// of the Bank calling object.
public void addNewBook(Book b) {
    if(totalBooks < books.length) {
        books[totalBooks] = b;
        totalBooks++;

    }
    else
    {
        System.out.println("\nSorry, cannot add book to stock.");
    }

}

public void addBookQuantity(String title, int quantity) {
    for (int i =0; i<totalBooks; i++) {
        if (title == books[i].getTitle() ) {
            books[i].addQuantity(quantity);
            System.out.println("Quantity added successfully");
            return;
        }
    }
}

public boolean inStock (String title, int quantity) {
    for (int i =0; i<totalBooks; i++) {
            if (title.equals(books[i].getTitle())) {
                if (quantity <= books[i].getQuantity()) {return true;}
                else {return false;}
            }
        }
    return false;

}

public boolean sellBook(String title, int quantity){
    int i;

        boolean sellflag=false;

        // Checks to see if the books are in stock.
        boolean retval = inStock(title, quantity);

        // If so, completes the sale.

        if (retval) {

          for (i=0; i<totalBooks && !sellflag; i++) {

            if (title.equals(books[i].getTitle())) {

              books[i].subtractQuantity(quantity);

              grossIncome += (books[i].getPrice()) * quantity;

              sellflag = true;

            }

          } // for

        } // if

        return retval;
        } // sellBook

public void listTitles()
{
    for (int i = 0; i < totalBooks; i++)
    {
        System.out.println(books[i].getTitle());
    }

}

public void listBooks()
{
    int i;

    System.out.println("\nList of Books\n======");
    for (i = 0; i < totalBooks; i++)
    {
        System.out.println(books[i]);
    }
    System.out.println();
}

public double getIncome()
{
    return grossIncome;
}
}

static class Book{

       private String title;
       private int numOfPages;
       private double price;
       private int quantity;
       private Book book;

       public String toString(){
           return "Title: " + title + "\nNumber of pages: " + numOfPages + "\nPrice:" + price +"\nQuantity: " + quantity + "\n";

       }

       public Book book(String thetitle, int pages, double cost, int num){
         /*title = thetitle;
         numOfPages = pages;
         price = cost;
         quantity = num;*/
         return book;

       }

       public String getTitle(){
         return title;
       }

       public double getPrice(){
         return price;
       }

       public int getQuantity(){
         return quantity;
       }

       public void addQuantity(int amount){
            quantity = quantity + amount;

    }
    public void subtractQuantity(int amount)
    {
          System.out.println("Amount to buy");
        Scanner s = new Scanner(System.in);
        quantity = s.nextInt();
        quantity = quantity - amount;
    }

}//end of class
}