Show HN: I built a fast Java linter in Rust

Category: devtools

Tags: java, linter, checkstyle, rust, static-analysis, tree-sitter

Score: 7.5/10 (Innovation: 6, Technical: 8, Documentation: 9, Utility: 7)

javaid is a Checkstyle-compatible Java linter written in Rust that delivers identical findings to Checkstyle 14.4.0 on its bundled Google and Sun configs, while running 3.6–5.7x faster single-threaded and 22–38x on 16 threads with far lower memory use. It reimplements 128 Checkstyle modules over a tree-sitter grammar and verifies byte-for-byte parity against the real Checkstyle on Guava and Spring Framework, making it a drop-in CI/hook replacement for large Java codebases.

Target audience: backend devs, devops, Java developers maintaining Checkstyle-based CI pipelines

Repository: https://github.com/rsmb7z/javaid · Rust · LGPL-2.1

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