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Code Analyzers

JSR305 Annotations for Findbugs
Findbugs: Because it's easy!
Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard
dependency analysis for specs2
<p>PMD scans Java source code and looks for potential problems like:</p> <ul> <li>Possible bugs - empty try/catch/finally/switch statements</li> <li>Dead code - unused local variables, parameters and private methods</li> <li>Suboptimal code - wasteful String/StringBuffer usage</li> <li>Overcomplicated expressions - unnecessary if statements, for loops that could be while loops</li> <li>Duplicate code - copied/pasted code means copied/pasted bugs</li> </ul> <p>You can <b><a ...

PMD is a source code analyzer. It finds common programming flaws like unused variables, empty catch blocks, unnecessary object creation, and so forth. It supports Java, JavaScript, Apex, PLSQL, Apache Velocity, XML, XSL. Additionally it includes CPD, the copy-paste-detector. CPD finds duplicated code in Java, C, C++, C#, Groovy, PHP, Ruby, Fortran, JavaScript, PLSQL, Apache Velocity, Scala, Objective C, Matlab, Python, Go, Swift and Apex.
The goal of quality-check is to provide a small Java library for basic runtime code quality checks. It provides similar features to org.springframework.util.Assert or without the need to include big libraries or frameworks such as Spring or Guava. The package quality-check tries to replace these libraries and provide all the basic code quality checks you need. The checks provided here are typically used to validate method parameters and detect errors during runtime. To ...
Clirr is a tool that checks Java libraries for binary compatibility with older releases. Basically you give it two sets of jar files and Clirr dumps out a list of changes in the public api. Clirr provides an Ant task that can be configured to break the build if it detects incompatible api changes. In a continuous integration process Clirr can automatically prevent accidental introduction of binary compatibility problems in Java libraries.