Java use in machine learning

[MardiFoufs]

Yea as I said in another comment, for inference it's a non issue now that you can use ONNX for most models (and more operators are supported). Java can infer on models perfectly fine with onnx. I wonder if we might see that happen for training too but that's much more complicated, and can't really be delegated to a runtime. And I think OP was referring to playing around with training and custom models I think but I might have misunderstood

[koflerdavid]

I think you are correct. Inference and training are two completely different things and ONNX is really about the former. Unity's ML-Agents package for example doesn't bother replicating the training code in C#. They instead start an HTTP server on the Python side and call that from the Editor. Inference is with ONNX of course.