Top 7 Java Code Quality Projects

Checkstyle

6 7,503 9.8 Java

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly configurable. It can be invoked with an ANT task and a command line program.

Project mention: 5 easy paths to become a recognized Java expert. Really. For free. | dev.to | 2022-08-25
SonarQube

25 7,475 9.9 Java

Continuous Inspection

Project mention: Usefully links for DotNet Backend Developers | dev.to | 2023-01-02

SonarQube https://www.sonarqube.org/
InfluxDB

www.influxdata.com
sponsored

Build time-series-based applications quickly and at scale.. InfluxDB is the Time Series Platform where developers build real-time applications for analytics, IoT and cloud-native services. Easy to start, it is available in the cloud or on-premises.
PMD

5 4,143 9.9 Java

An extensible multilanguage static code analyzer.

Project mention: Custom Gradle Plugin for Unified Static Code Analysis | dev.to | 2023-02-04

PMD and Checkstyle are static analysis tools that check your code on each project build. Gradle allows to apply them easily.
Tailor

0 1,390 0.0 Java

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

1 345 4.5 Java

:elephant: SonarPHP: PHP static analyzer for SonarQube & SonarLint

Project mention: How does one get this "PHP Control Flow Viewer" sidebar? | reddit.com/r/phpstorm | 2022-02-10
gradle-baseline

0 257 9.2 Java

A set of Gradle plugins that configure default code quality tools for developers.
error-prone-support

1 90 10.0 Java

Error Prone extensions: extra bug checkers and a large battery of Refaster rules.

Project mention: Picnic Open-sources Error Prone Support | reddit.com/r/java | 2022-10-13

Maybe the checks and rules are already usable for you with these two checks disabled? By the way, it is not required to use either Guava or New Relic to be able to integrate Error Prone Support. For example, the `ScheduledTransactionTrace` BugCheck will just be a no-op if you don't use New Relic :). W.r.t. to your fourth point, if you are sure there is not a change in ordering and you indeed found a false positive could you maybe file a bug report :)? We want to fix all false positives where possible of course.
Sonar

www.sonarsource.com
sponsored

Write Clean Java Code. Always.. Sonar helps you commit clean code every time. With over 600 unique rules to find Java bugs, code smells & vulnerabilities, Sonar finds the issues while you focus on the work.

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 2023-02-04.