Slides for Voxxed Days Bucharest

1. From native code gems to Java
treasures with jextract

2. Hello! I am Ana

3. What problem do we aim to solve?
System APIs (Bluetooth, USB)
Machine Learning (ONNX, Tensorflow)
Off-CPU computing (Cuda, OpenCL)
Graphics processing (OpenGL, Vulkan, DirectX)
Others (CRIU, fuse, OpenSSL, V8, ucx)
can be

4. Foreign function and memory API workflow

5. Automate generating FFM bindings with jextract

6. Let’s see it in action!

7. A substrate for native access in the JVM

8. Foreign function and memory API adoption

9. Useful links
• Try the FFM API in JDK 24!
• https://jdk.java.net/24/
• Subscribe to panama-dev@openjdk.org and send feedback!
• Generate FFM bindings with the jextract tool
• https://jdk.java.net/jextract/
• jextract guide: https://github.com/openjdk/jextract/blob/master/doc/GUIDE.md
• Checkout examples:
• jextract samples: https://github.com/openjdk/jextract/tree/master/samples
• Calling a rust library with the Panama FFI
• Build the latest version of the FFM API & jextract
• https://github.com/openjdk/panama-foreign
• https://github.com/openjdk/jextract