This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
For problem 1 - define an error page and have it dump a stack trace. For problem 2 - the most common causes are: a. class file in the wrong place b. failure to give the complete package in the class attribute of your <jsp:useBean tag Bill