take querystring from portlet

[mcolak]

I can't take any of querystring from my portlet. How can I take queryString example http://localhost:8080/portal/HelloWorldPortlet?k=hello

or

http://localhost:8080/portal?k=hello

rRequest.getParameter("k"); not get this variable

[mcolak]

http://localhost:8080/portal/portal/default/default/HelloWorldPortletWindow?action=e&kat=deneme&windowstate=normal&mode=view

I think this is not good choice but I haven't found any good answer yet