Help with Argument Validation in Java

The blog post Google Guava vs Apache Commons for Argument Validation is exactly that, a concise well-written comparison of the two. Conclusion: They are both good, but Guava may be a bit cleaner/simpler than Commons.

This post is one amongst many in this good list of Guava-related resources.

Ditto on My Opinion of Vaadin

This article echoes my opinion about Vaadin toolkit for building business/desktop-style apps that happen to be delivered in a web browser.