Exception

[Wolle]

Hello,
I've seen that a normal Servlet Class will throw two Excetions,
A ServletException and a IOException,
i'm not happy about hand over some Exception without knowing what will
done with it, and where will these Exception be thrown ? IOException, i
guess, when something failed with creating /using the PrintWriter ,  but
what is with the ServletException.

Does anybody know something about that, and coud help me, please ?

Greetings,
Michael