Style checker

List of code style checkers

http://checkstyle.sourceforge.net

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard.

http://www.inspirel.com/vera

Vera++ - Programmable verification and analysis tool for C++

https://github.com/diffplug/spotless

Spotless formats many langs using Java with Maven/Gradle integrations.