Take a look at http://cmusphinx.sourceforge.net
It has been a while since I’ve looked into this stuff, but you might
peek at sphinx4 for java.
I know this may not be the exact response you are looking for … But
… I have made several other java libraries to work quite well by
building ruby wrappers and making use of a jruby environment.
Java api docs are here:
http://cmuphinx.sourceforge.net/sphinx4/javadoc