This week's book giveaway is in the Testing forum. We're giving away four copies of The Way of the Web Tester: A Beginner's Guide to Automating Tests and have Jonathan Rasmusson on-line! See this thread for details.
From a thread safety perspective, what kind of issues can we encounter using java.util.ArrayList class instances in Servlet classes, and EJB classes? It will be great to describe this with an example, where an error can occur
It is recommended as very safe, and widely used, so when should it be not used in a Web environment?