How to detect browser types

[sheed]

Hi how can I detect a browser type using jsp. Is there a way to detect all browser types i.e. IE,Netscape,Firefox,Opera etc.. I know I can use the following to get info about the browser:

String ua = request.getHeader( "User-Agent" );

But using so doesn't get me back about Opera and don't know what other browser types. Is there a way to get info about all the browsers.

Thanks