private String validate(Order order) {
		String custID = order.getCustomerID();
		String itemID = order.getItemID();
		int qty = order.getQty();
		double price = order.getPrice();
		if (custID != null && itemID != null && !custID.equals("")
		&& !itemID.equals("") && qty > 0
		&& price > 0.0) {
			
			return "ORD"+r.nextInt(10000);
		}
		return null;
	}