Bookstore.java

import java.util.*;

public class BookStore
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        ArrayList<Book> bookList = new ArrayList();
        Boolean isPopulated = false;
        int option = 0;

        do
        {
            MainMemu();
            option = input.nextInt();

            switch(option)
            {
                case 1:
                    generateBookList(bookList);
                    isPopulated = true;
                    break;

                case 2:
                    if(isPopulated)
                        getBookList(bookList);
                    else
                        System.out.println("Sorry, The Booklist hasn't been generated, please try option 1.");
                    break;

                case 3:
                    System.exit(0);
                    break;

                default:
                    System.out.print("Error: Invailed option, please select another.");
            }
        }
        while(option != 100000);
    }

    public static void MainMemu()
    {
        System.out.println("1.\tGenerate Book List\n2.\tDisplay booklist\n3.\tExit");
    }

    public static void getBookList(ArrayList<Book> bookList)
    {
        Book getBookObject = new Book("");

        for(int x = 0; x < bookList.size(); x++)
        {
            getBookObject = bookList.get(x);

            System.out.println(getBookObject.getTitle());
        }
    }

    public static void generateBookList(ArrayList<Book> bookList)
    {
        System.out.println("Starting book generation...");

        for (int i = 0; i < 5; i++)
        {
            Book newBookObject = new Book("Book title " + ( i + 1 ));
            bookList.add(newBookObject);
            System.out.println("Book " + i + " out of 5 has been generated");
        }

        System.out.println("Book list generated.");
    }
}