What do you mean by "calling" a JSP? Do you want to write some kind of browser or something?
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
If you need to just process a JSP that exists on a server for the purpose of getting some info back or processing some server side logic, you can use an HttpURLConnection.
If you want to process a JSP inside an embedded browser in your app, you'll need to look at the JEditorPane. Or you can google for other libraries that allow you to embed a native browser in your Swing application and such.