jni

library0.22.4rscratesunverified

Rust bindings to the Java Native Interface (JNI) for calling Java code from Rust and vice versa.

# Cargo.toml
[dependencies]
jni = "0.22.4"

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INSTALL

IMPORT

SIG · JNI

jni

otherrustv0.22.4

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

JNIEnv

✓ use jni::JNIEnv;

Defines a JNI function that creates a Java string and prints it via System.out.

use jni::JNIEnv; use jni::objects::JClass; #[no_mangle] pub extern "system" fn Java_HelloWorld_hello(env: JNIEnv, _class: JClass) { let output = env.new_string("Hello from Rust!").unwrap(); env.call_static_method("java/lang/System", "out", "()Ljava/io/PrintStream;", &[]).unwrap(); }

Debug

Known issues

gotchaJNI functions must have the exact naming convention and be compiled as a cdylib.

fix

Set crate-type = ["cdylib"] in Cargo.toml and ensure function names match Java package paths.

affects: >=0.20.0

Upgrade

Version history

0.22.4latest on crates.io

Audit

Dependencies

No dependency data recorded yet.

Agent activity

6 hits · last 30 days

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Resources

githubhttps://github.com/jni-rs/jni-rs ↗

homepagehttps://github.com/jni-rs/jni-rs ↗

docshttps://docs.rs/jni/ ↗