[ba-unrev-talk] Rhino script interpreter looks good
http://www.javaworld.com/javaworld/jw-04-2002/jw-0405-scripts-p2.html (01)
Conclusion:
Rhino runs significantly faster than BeanShell and likewise supports
Java-like syntax in its scripting. Moreover, it appears well written and
well supported, and you'll find numerous JavaScript syntax books at the
bookstore. I had no problems and recommend it if you have equally
balanced needs for performance, Java-like syntax, and strong support for
the libraries. (02)
The article has the details, and they appeared to support the conclusion (03)
quite nicely. Other Java-compatible alternatives were
Beanshell
Jython
Jacl (04)