JBeret currently supports writing batch artifacts in scripting languages, such as Groovy, Scala, JRuby, Jython, PHP, JavaScript, R, etc, it should also be able to support Java as a script language.

This can be useful for quick testing and prototyping in batch applications for Java developers.

java.net Java Script Engine (JSR-223):
https://java.net/projects/scripting/sources/svn/content/trunk/engines/java/src/com/sun/script/java/JavaScriptEngine.java?rev=236

list of available script engines:
http://stackoverflow.com/questions/11838369/where-can-i-find-a-list-of-available-jsr-223-scripting-languages

Apache BSF:
http://commons.apache.org/proper/commons-bsf/

Apache BSF engines maven artifact