ffmkit

A modern, type-safe abstraction over the Java Foreign Function & Memory (FFM) API.

ffmkit makes native interop on Java 22+ feel like a high-level library — not like programming the linker by hand.

Group / package	io.github.undeffineddev.ffmkit
Module	io.github.undeffineddev.ffmkit
Java	22+
Build	Gradle
Status	0.1.0-EXPERIMENTAL

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Why ffmkit?

Since Java 22, the supported way to talk to native code is FFM (Project Panama) — the modern replacement for JNI. FFM is powerful, but:

• It is verbose and confusing for beginners (Arena, Linker, FunctionDescriptor, MethodHandle, …)
• Memory management is easy to get wrong
• Mapping C types ↔ Java by hand is repetitive

Then I thought about creating a small library to facilitate development

Warning

This is an experimental project, so expect breaking changes.

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Documentation

• Native C types — ABI mappings, CChar, WChar, _Bool, and fluent NativeType constants
• Native functions
• Native loader
• Callbacks
• Structs
• Memory scopes and pointers, Pointer helpers
• Native arrays