Top Code Analysis Libraries for Java

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

Error Prone parent POM · Error Prone is a static analysis tool for Java that catches common programming mistakes at compile-time.

NullAway · A fast annotation-based null checker for Java

SpotBugs · SpotBugs: Because it's easy!

SonarJava · Code Analyzer for Java

jQAssistant Plugin for Apache Maven · jQAssistant plugin for Apache Maven to integrate jQAssistant into a Maven based project.