JSP Page HttpServletRequest getAttribute Typecasting

Question

Hi There,

Any ideas on the correct method of typecasting an Object out of a getAttribute request from a JSP page HttpServletRequest?

I have googled but it seems that the common solution is just sticking suppresswarnings in your code... Something I would very much like to avoid.

I currently have:

HashMap<String, ArrayList<HashMap<String, String>>> accounts = (HashMap<String, ArrayList<HashMap<String, String>>>)request.getAttribute("accounts");

And the complier is giving me this warning: Unchecked cast from Object to HashMap

Thanks in Advance!!

MB.

Answer 1

Yeah, either you need to cast or suppress the warning. In case you decide to suppress the warning, I recommend you to put a comment, too.

Similar thread, and another.

Answer 2

I ended up using JSTL tags to iterate over the collection, this allowed for an elegant solution not requiring suppression of unchecked warnings.