https://github.com/xyproto/java-ffi-example
Example use of FFI for Java >= 22
https://github.com/xyproto/java-ffi-example
ffi java libc make openjdk22
Last synced: 5 months ago
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Example use of FFI for Java >= 22
- Host: GitHub
- URL: https://github.com/xyproto/java-ffi-example
- Owner: xyproto
- License: bsd-3-clause
- Created: 2024-06-17T16:27:39.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-06-21T11:07:54.000Z (over 1 year ago)
- Last Synced: 2025-02-16T18:26:59.955Z (8 months ago)
- Topics: ffi, java, libc, make, openjdk22
- Language: Java
- Homepage:
- Size: 7.81 KB
- Stars: 1
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# java-ffi-example
Example use of FFI for Java >= 22.
Print the contents of `results.txt` using `fopen`, `fgets` and `fclose` from the system libc.
## Building and running
### Prerequisites
Set the `JAVA_HOME` environment variable to the Java installation path (needs to be Java version 22 or later).
For example, for macOS + homebrew + zsh: `export JAVA_HOME=/opt/homebrew/Cellar/openjdk/22.0.1/`.
`make` is also required.
### Building
make
### Running
make run
The contents of `results.txt` will then be printed, using `fopen`, `fgets` and `fclose` from the system libc.
## References
Inspired by:
* https://ifesunmola.com/how-to-use-the-foreign-function-api-in-java-22-to-call-c-libraries/
Which in turn was inspired by:
* https://docs.oracle.com/en/java/javase/21/core/foreign-function-and-memory-api.html
* https://github.com/openjdk/jextract
* https://jdk.java.net/jextract/
* (YouTube) Foreign Function & Memory API - A (Quick) Peek Under the Hood
* (YouTube) Java 22 Launch Stream with Jorn Vernee and Per Ake Minborg
* https://news.ycombinator.com/item?id=34580907#34586552
## General info
* Version: 1.0.0
* License: CC0