Seeing as they do release the jdk 1.5.0 source code to some developers / researchers, it is very well possible they included the jre source aswell( it usually is ). This would still be difficult as you need to have reason to retrieve the source code, and hope there is the jre source inside. Not only that but you would then have to port it, which I'm sure isn't easy.
The possibility still exists.
You could even go as far as using one of the open source jre solutions, and try to make it work( http://gcc.gnu.org/java/ )
Edited by webhostbudd, 05 April 2009 - 05:59 PM.