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 many languages. It can be extended with custom rules. It uses JavaCC and Antlr to parse source files into abstract syntax trees (AST) and runs rules against them to find violations. Rules can be written in Java or using a XPath query.
In the future we hope to add support for data/control flow analysis and automatic (quick) fixes where it makes sense.
Download the latest binary zip from the releases and extract it somewhere.
bin/run.sh pmd or
See also Getting Started
This shows how PMD can detect for loops, that can be replaced by for-each loops.
There are plugins for Maven and Gradle as well as for various IDEs. See Tools / Integrations
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Our latest source of PMD can be found on GitHub. Fork us!
The rule designer is developed over at pmd/pmd-designer. Please see its README for developer documentation.
Become a financial contributor and help us sustain our community. Contribute
This project follows the all-contributors specification. Contributions of any kind welcome!
See credits for the complete list.