developerWorks has published my latest article, Test your tests with Jester . This article describes how to use Jester to verify test suite coverage and thereby find bugs you didn't know you had. I have a love-hate relationship with Jester. On the one hand, it's based on a brilliant, radical idea. The underlying approach (changing the code and seeing what doesn't break) almost always reveals interesting and useful information about your code base. At the same time, Jester is so incredibly difficult to configure and takes so long to run that I don't use it nearly as often as I should. I hope this article sets down enough information about just how to get Jester working that I don't have to continually rediscover this every time I use this tool. Next up will be an article on more traditional code coverage tools that perhaps don't have the same level of insight that Jester does, but are much easier to configure and faster to run.
Sun has begun posting the JavaDocs for Java 1.6/a.k.a. Java 6/Mustang on java.net. I'm glad to see this, though the "DRAFT" watermark is very annoying. Fortunately Chris Pederick's Web Developer Toolbar for Mozilla/Firefox lets me turn that off.