# j4rs_derive The proc macro crate for `j4rs` that allows jni calls to Rust libraries. It provides the `call_from_java` attribute. The functions annotated with it, can be called from Java code using JNI. For more information and examples please see [here](https://github.com/astonbitecode/j4rs#Java-to-Rust-support) and [here](https://github.com/astonbitecode/j4rs-java-call-rust).