I followed tutorial in this page Can I access Java code from Unity? - Questions & Answers - Unity Discussions. But I had error like this “The type or namespace name ‘ExampleLibrary’ could not be found. Are you missing a using directive or an assembly reference?”. I put file jar and cs in the same place.
What you’ve missed in that explanation was although they originally wrote the code in java they compiled the java into dlls, effectively translating the java into another language and then into machine language so those UNITY ‘java’ plugins are actually windows dlls. I hope the person using the high-level AI java libraries has regression tests ready for these dll translated libraries.
You need to look again…