public static void add(RandomAccessFile database, String title, String author, String publisher, int pageNum, int pub_date, double price) throws IOException
	{
		String titlePad = StringUtility.pad(title, 32, '*');
		String authorPad = StringUtility.pad(author, 32, '*');
		String publisherPad = StringUtility.pad(publisher, 32, '*');

		Book b = new Book(title, author, publisher, pageNum, pub_date, price);

		database.seek(pointer);

		database.writeBoolean(true);
		database.writeUTF(titlePad);
		database.writeUTF(authorPad);
		database.writeUTF(publisherPad);
		database.writeInt(pageNum);
		database.writeInt(pub_date);
		database.writeDouble(price);

		pointer += Book.REC_SIZE;

		//create new HashMap
		map = new HashMap<String, Long>();

		map.put(b.getTitle(), pointer);
	}

	public static void close(RandomAccessFile database)
	{
		try
		{
			database.close();
		}
		catch(Exception e)
		{
			System.out.println("Close failed");
		}
	}



public static void showAll(RandomAccessFile database) throws IOException
	{
		for(int i = 0; i<database.length(); i++)
		{
			try
			{
				database.seek(i * Book.REC_SIZE);
				System.out.println(database.readBoolean());
				if(database.readBoolean())
				{
					String title = StringUtility.unpad(database.readUTF(), '*');
					String author = StringUtility.unpad(database.readUTF(), '*');
					String publisher = StringUtility.unpad(database.readUTF(), '*');
					int pageNum = database.readInt();
					int pub_date = database.readInt();
					double price = database.readDouble();


				System.out.println(title + "  " + author + "  " + publisher + "  " + pageNum + "  " + pub_date+ "  "  + price);
				}
				//System.out.println(database.readBoolean());

			}

			catch (IOException e)
			{
				e.getStackTrace();
			}
		}

	}



	public static void deleteByRecord(RandomAccessFile database, String title) throws IOException
	{

		database.seek(map.get(title)*Book.REC_SIZE);

		database.writeBoolean(false);
		map.remove(title);
		count--;


	}