Comment by bullen

I agree that Java + native is the way to go.

But does rust really give you an edge over C/C++?

Here is how you do JNI with C++: http://move.rupy.se/file/jvm.txt

So simple it's ridiculous!

Then you can use RegisterNatives to give C++ API to the Java side instead of the stub (Java calls C++ .dll/.so) thing...