I decided to collect code style examples from the well-known company in the java community. There are both direct links to setting up the checkstyle and examples of setting the IDE.
Found an error or would you like to add one more company? Add in the comments!
Of course first in our list and base checkstyle rules for many companies.
Apache has ready to use checkstyle rules.
Mediawiki published it’s checkstyle rules.
Twiter also use checkstyle to check code style.
Square has code style configuration for IntelliJ IDEA with sh/bat files to install.
Netflix store configuration for checkstyle and findbugs plugins individually on each project in codequality folder.
For example Spectator has configs for checkstyle and findbugs plugins.
Eureka project has only checkstyle rules.