[cscotta]

> 90% of Java's libraries are very, erm, "enterprise."

Are they? Apache's Commons collection of libraries such as ArrayUtils, StringUtils, IO, and the like, along with JSON-Simple/jvYAML, the servlet API, any database driver, Log4J, and just about every other library I use on a daily basis has a clean, focused, well-designed, and impeccably well-documented API.

I'm sure there are no shortage of "enterprise-y" libraries and APIs, but could you offer a few examples of common, popular libraries used in a large portion of J2SE (not EE) projects whose APIs are poor on a level beyond that which may offend your aesthetic sensibilities? Some that come to mind for me might be Swing (I don't write GUI apps), but am curious to hear what you've encountered.