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

Copy below Checkstyle maven dependency and paste in your project pom.xml file:

<!-- https://mvnrepository.com/artifact/com.puppycrawl.tools/checkstyle -->
<dependency>
    <groupId>com.puppycrawl.tools</groupId>
    <artifactId>checkstyle</artifactId>
    <version>8.27</version>
</dependency>

Copy below Checkstyle gradle dependency and paste in your project build.gradle file:

// https://mvnrepository.com/artifact/com.puppycrawl.tools/checkstyle
compile group: 'com.puppycrawl.tools', name: 'checkstyle', version: '8.27'

https://repo1.maven.org/maven2/com/puppycrawl/tools/checkstyle/8.27/checkstyle-8.27.jar

https://mvnrepository.com/artifact/com.puppycrawl.tools/checkstyle

https://mvnrepository.com/artifact/com.puppycrawl.tools/checkstyle