How to call rust from java

Building rust

Ensure you have maven and rust installed.

For example on macos with apple silicon:

cd lib-rust
rustup target add x86_64-apple-darwin
cargo build --target x86_64-apple-darwin
cp target/x86_64-apple-darwin/debug/libdummymath.dylib ../use-java/

You can adjust this for you platform, but what this does is install the x86_64 builder and build a rust binary for x86_64. The binary will be loaded by the use-java code.

Building and running from java

cd ../use-java
mvn package

You can then run the Main class from your IDE or from the command line.

This will load the libdummymath.dylib and call the rust code.