Project Panama: Interconnecting the Java Virtual Machine and Native Code 

Yeah, that's going to require some work on the C++ side. The main difference between the two is that C has a standardized ABI, which is why it is used to build system libraries and why many other language can generate shared object libraries that conform to the ABI. But C++ doesn't have that; so it's compile to C ABI or bust. Guess there's a reason it's called C++ ("C++ is more that C, but just use C").... That said, the choice in Panama to connect at ABI level already makes so many obstacles go away. I experimented a bit with the preview in Java 19 and talked to code written in Rust. Have fun doing that through JNI.

@@bentels5340 I’ve connected to Delphi using JNI. It’s got some problems. I know C++ makes things tricky, but I would imagine it’s a substantial target for JNI use. I find that once you have set things up so I can develop a C layer to interface to C++ and other languages, JNI doesn’t add that much more complexity. After all, there is work getting data between C and C++. JNI isn’t that bad for this kind of thing if you are already having to manage C interfaces to libraries on each platform. So, until C++ support arrives, it’s JNI for me.