From native code gems to Java treasures with jextract
summary
jextract parses C headers and generates Java FFM bindings so Java code uses native libraries directly; it ships separately but works with JDK 22+ and Java 24. Examples include calling localtime_r from libc (generated class time_h), embedding libpython3.11 and running a Python script via pyon bindings, rendering an OpenGL teapot after trimming ~4,000 symbols with dump-includes, and calling a Rust-produced C API (hello world). jextract can trace calls and show memory addresses and sizes for debugging.
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chapters (8)
- 0:00jextract and native Java
- 3:18Foreign Function Memory API
- 5:34Installing jextract
- 9:00Generating C bindings
- 15:09Python bindings with jextract
- 23:25OpenGL with jextract
- 36:28Rust libraries without headers
- 40:02Summary and future of FFM
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