JSR 308 is a release driver for JDK7:
http://jplan.sfbay.sun.com/feature/619
Current specification for the JSR can be found at
    http://groups.csail.mit.edu/pag/jsr308
JCK7 should be able to tests new language features introduced by this JSR.
Potentially impacted tests are:
- JCK signature test
- compiler tests that check signatures of generated classes
- annotation processing tests that use the SigTest API to build the language model in some cases
- JAXB tests ?
A number of change were made in JSR308 specs (v. 1.3.1)
http://types.cs.washington.edu/jsr308/specification/jsr308-changes.html
including changes in class file format extensions that broke a significant number
of compiler tests that use signature test tool.
Signature test needs to be updated for JCK8 to suport the latest version of JSR 308.