This week's book giveaway is in the OCAJP forum. We're giving away four copies of Programmer's Guide to Java SE 8 Oracle Certified Associate (OCA) and have Khalid A Mughal & Rolf W Rasmussen on-line! See this thread for details.
The @remove annotation is used only on Stateful session beans methods. After the method annotated with @remove returns, the instance is destroyed by the container. This is because with Stateful session beans every client gets its own instance and this way the performance is greatly improved. (Think in this scenario if every instance would need to wait a timeout to be destroyed)