This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
Have you looked under javax.naming.Context and javax.naming.directory.DirContext? In brief, the DirContext is for directories or folder. Context is for the object level. These interfaces and the NamingException is part of the Java Naming and Directory Interface (JNDI). Some reading on this topic will get you a bit more answers. The Java Tutorial for JNDI is here