The best place to start for a new XNIO-based project is the user guide.  Please note that the user guide is a work in progress.  Also listed are API Javadocs for the current and past releases.

Name Version Links
Developer Guide (3.0) - HTML
Developer Guide (2.0) rev 1 (WIP) HTML, HTML-single, PDF
API Javadoc 3.1 HTML
API Javadoc 3.0 HTML
API Javadoc 2.0 HTML, JAR
API Javadoc 1.2 HTML, JAR
API Javadoc 1.1 HTML, JAR
API Javadoc 1.0 HTML, JAR