The flow of control in
java methods does not suddenly change because you are writing
servlets.
So if you call a method, it will do that method, finish it, and then continue on down through the code.
Now dealing with JSP/servlet coding, if the method call sends/commits the response (like a forward/redirect does) then you should make sure your code does not continue writing to the response, as it will raise an
IllegalStateException.
As such, it is normally a good policy, after a forward/redirect to return immediately, and thus prevent problems.