private boolean BookFieldCheck(String booklistString){
		boolean isbn = false;
		boolean bookdate = false;
		Scanner analysisbooklist = new Scanner(booklistString);
		while (analysisbooklist.hasNext()){
			String getstring = analysisbooklist.next();
			if(this.BooklistISBNCheck(getstring)){
				isbn = true;
			}
			else if(this.BooklistDateCheck(getstring)){
				bookdate = true;
			}
		}
		
		analysisbooklist.close();
		
		if(isbn && bookdate){
			return true;
		}
		else{
			return false;
		}
		
		
	}