Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard
'com.puppycrawl.tools:checkstyle:5.2'
<dependency>
<groupId>com.puppycrawl.tools</groupId>
<artifactId>checkstyle</artifactId>
<version>5.2</version>
</dependency>
<dependency org="com.puppycrawl.tools" name="checkstyle" rev="5.2"/>
"com.puppycrawl.tools", "checkstyle", "5.2"