Pee Em Dee

PeeEmDee (PMD) is a static ruleset-based Java SourceCode analyzer that identifies potential problems like:

Possible bugs - Empty try/catch/finally/switch blocks.
DeadCode? - Unused local variables, parameters and private methods
Empty if/while statements
Overcomplicated expressions - Unnecessary if statements, for loops that could be while loops
Suboptimal code - wasteful String or StringBuffer usage
Classes with high Cyclomatic Complexity measurements (see also CyclomaticComplexityMetric)
DuplicatedCode - Copied/pasted code can mean copied/pasted bugs, and decreases maintainability.

While PeeEmDee doesn't officially stand for anything, it has several unofficial names, the most appropriate probably being Programming Mistake Detector.

Typically, PeeEmDee errors are not true errors, but rather inefficient code, i.e. the application could still function properly even if they were not corrected.

Homepage: http://pmd.sourceforge.net

To many PeeEmDee errors are style arguments elevated to laws. Examples include CollapsibleIfStatements? or UselessParentheses? that violate the concept of Clarity overides style every time. Then you are expected to clutter the code with @SuppressWarnings?("PMD") to suppress the false failures. MartinSpamer