This post is more than 2 years old.
Just a quick note that one of Adobe's ColdFusion team members has discovered a bug with javaSettings. If you don't remember, javaSettings is a way to dynamically load JAR files for a ColdFusion application. This allows you to skip using the CF Admin to work with Java classes. The bug is simple. If you use reloadOnChange:true, which is something you would only do in development anyway, then ColdFusion may have an issue loading the files correctly. To get around this, simply set that value to false, and restart CF. Yes, that is a bit annoying if you are writing the Java classes, but if you are just using some you downloaded, then it is a one-time annoyance. You still get to keep your Java files within your application folder so that's good too. I've filed a bug report for this so feel free to vote/comment on it.