This chapter focused on issues regarding the use of log4j in a J2EE environment. We have discussed the challenges of logging within a J2EE environment and demonstrated how log4j can be used within WebLogic by understanding the class-loading issues in WebLogic. Once you know how individual J2EE containers deal with different parts of a J2EE application, it will be fairly easy to figure out how to package log4j in your J2EE application.