This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Another way: copy the abc.properties file to server/xxx/conf - that directory is in the classpath. This is usually preferred to adding to the classpath if you want to have a properties file that is external to your WAR or EAR file.