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# PMD
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[](https://gitter.im/pmd/pmd?utm_source=badge& utm_medium=badge& utm_campaign=pr-badge& utm_content=badge)
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[](https://travis-ci.org/pmd/pmd)
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[](https://github.com/jvm-repo-rebuild/reproducible-central#net .sourceforge.pmd:pmd)
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[](https://coveralls.io/github/pmd/pmd)
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[](code_of_conduct.md)
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## About
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**PMD** is a source code analyzer. It finds common programming flaws like unused variables, empty catch blocks,
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unnecessary object creation, and so forth. It supports Java, JavaScript, Salesforce.com Apex and Visualforce,
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Modelica, PLSQL, Apache Velocity, XML, XSL, Scala.
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Additionally it includes **CPD** , the copy-paste-detector. CPD finds duplicated code in
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C/C++, C#, Dart, Fortran, Go, Groovy, Java, JavaScript, JSP, Kotlin, Lua, Matlab, Modelica,
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Objective-C, Perl, PHP, PLSQL, Python, Ruby, Salesforce.com Apex, Scala, Swift, Visualforce and XML.
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## Support
* How do I? -- Ask a question on [StackOverflow ](https://stackoverflow.com/questions/tagged/pmd ).
* I got this error, why? -- Ask a question on [StackOverflow ](https://stackoverflow.com/questions/tagged/pmd ).
* I got this error and I'm sure it's a bug -- file an [issue ](https://github.com/pmd/pmd/issues ).
* I have an idea/request/question -- file an [issue ](https://github.com/pmd/pmd/issues ).
* I have a quick question -- ask on our [Gitter chat ](https://gitter.im/pmd/pmd ).
* Where's your documentation? -- < https: // pmd . github . io / latest />
## Source
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Our latest source of PMD can be found on [GitHub ](https://github.com/pmd/pmd ). Fork us!
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* [How to build PMD ](BUILDING.md )
* [How to contribute to PMD ](CONTRIBUTING.md )
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The rule designer is developed over at [pmd/pmd-designer ](https://github.com/pmd/pmd-designer ).
Please see [its README ](https://github.com/pmd/pmd-designer#contributing ) for
developer documentation.
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## Website
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More information can be found on our [Website ](https://pmd.github.io ).