How do I call a class in jsp page

Forgive me for the simple question.
I am not new to Java but I am brand new to JSP and I am having a hard time with some of the basics.
I created a servlet "General" with a class in it called "RandomNumber" which returns an integer.
How can I call this from a JSP page?
Do I need to just create a class as opposed to a servlet?

Thanks for reading and thanks for any help in advance.

Edit:Added info

Your RandomNumber class doesn't need to be inside the Servlet does it?
There are several ways of displaying values in JSPs. A popular approach is to use a bean. Read all about it in Sun's JavaEE tutorial (freely downlodable from the internet)
Just remember never to put Java code inside JSPs.

Thanks I appreciate it.