正式発表(?)
http://java.sun.com/javaone/tech_sessions1.html

> Java 2 Platform, Standard Edition (J2SE) Version 5.0 (code name "Tiger").
> This new release of the Java platform includes a very large number (almost 100)
> of Java Specification Requests (JSRs) and other updates designed to improve ease
> of development, speed performance, and extend monitoring and management capabilities.
> Even core XML support has been enhanced. If you're wondering why Tiger is J2SE "5.0"
> instead of the traditional J2SE "1.x", Hamilton noted that "because J2SE 5.0 is our
> biggest update to the platform since the original 1.0, it felt kind of stupid that
> we were still calling things 1.1, 1.2, ... And with a big roaring Tiger,
> we wanted to change the numbering system, so we're now going to use the 5.0 number for J2SE,
> and similarly Jave 2 Platform, Enterprise Edition (J2EE) is going to move to 5.0.
> Future releases will be 6.0 and 7.0."