Top 5 Java Linter Projects

PMD

4 4,426 9.7 Java

An extensible multilanguage static code analyzer.

Project mention: Amazon CodeGuru Reviewer: already time for retirement? | dev.to | 2023-08-01

While the security findings can be pretty elaborate and helpful, the code quality and performance focused findings are not that impressive and can often be detected by more basic or powerful tools like SonarQube (paying) or PMD (free). To see what I mean you can have a look at the list of Java code quality detectors, which is pretty short and contains a lot of simple findings like:
Spotbugs

2 3,169 9.2 Java

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

Project mention: Primeiros passos no desenvolvimento Java em 2023: um guia particular | dev.to | 2023-01-19
InfluxDB

www.influxdata.com
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Collect and Analyze Billions of Data Points in Real Time. Manage all types of time series data in a single, purpose-built database. Run at any scale in any environment in the cloud, on-premises, or at the edge.
validator

1 1,524 7.5 Java

Nu Html Checker – Helps you catch problems in your HTML/CSS/SVG (by validator)

Project mention: Ask HN: Small scripts, hacks and automations you're proud of? | news.ycombinator.com | 2023-03-12

I write a ton of CSS and could not find a command line stylesheet checker. I did find the NuHTML checker from W3C, cough, which also checks CSS: https://github.com/validator/validator/releases/tag/20.6.30
I wrote a script to convert the inset a CSS file into a dummy one-line HTML file, so that I can pass a CSS file to the script, and when errors are generated from the CSS, they are given using the correct line number.
Tailor

0 1,400 0.0 Java

Cross-platform static analyzer and linter for Swift. (by sleekbyte)
textidote

0 851 0.0 Java

Spelling, grammar and style checking on LaTeX documents
Revelo Payroll

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Free Global Payroll designed for tech teams. Building a great tech team takes more than a paycheck. Zero payroll costs, get AI-driven insights to retain best talent, and delight them with amazing local benefits. 100% free and compliant.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-08-01.