PMD MCP Server: Multilingual Static Code Analyzer for 16 Languages & Duplicate Code Detection

Pmd

PMD is an extensible multilingual static code analysis tool mainly used to detect common programming defects in languages such as Java and Apex. It supports 16 languages and more than 400 built - in rules and includes a duplicate code detection function.

Developer tools Other #Static Code Analysis #Multilingual Support #Code Quality #Duplication Detection .Java

rating : 2 points

downloads : 8.7K

update time : 2025-12-29

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What is PMD?

PMD is a powerful static code analysis tool that discovers potential problems and bad practices by scanning source code without actually running the program. It's like an experienced code reviewer that can automatically identify various issues in the code, helping developers write higher - quality and more maintainable code.

How to use PMD?

PMD offers multiple usage methods: you can directly download the binary package and run it via the command line, integrate it into build tools such as Maven and Gradle, or install it as a plugin in various IDEs. The basic usage process includes: downloading and installing, configuring rules, running analysis, and viewing reports.

Applicable Scenarios

PMD is particularly suitable for the following scenarios: 1. Team code quality assurance 2. Code review automation 3. Enforcement of coding standards 4. Identification of technical debt 5. Training for new developers on code quality 6. Quality gate in the continuous integration process

Main Features

Multilingual Support

Supports 17 programming languages, including Java, JavaScript, Kotlin, Swift, Python, Go, etc., meeting the needs of different technology stacks.

Rich Rule Library

Comes with more than 400 code inspection rules covering multiple aspects such as code quality, performance, security, and best practices.

Code Duplication Detection (CPD)

Built - in Copy - Paste Detector can automatically identify duplicate code fragments, helping to reduce code redundancy.

Extensibility

Supports custom rule development. You can create inspection rules for specific requirements by writing in Java or using XPath queries.

Multiple Integration Methods

Provides multiple usage methods such as command - line tools, build tool plugins, and IDE plugins, adapting to different development workflows.

Open - Source and Free

Completely open - source and free, licensed under the BSD license, allowing free use, modification, and distribution.

Advantages

Supports multiple programming languages, with a wide range of applications

Rich and continuously updated rules

Open - source and free, with an active community

Easy to integrate into existing development processes

Provides detailed error reports and repair suggestions

Supports custom rule extensions

Limitations

Support for some languages may not be as comprehensive as specialized tools

May require a certain learning cost to understand all rules

The false - positive rate needs to be adjusted according to the actual situation of the project

Analysis of large projects may take a long time

How to Use

Download and Install

Download the latest version of the binary package from the GitHub Releases page and extract it to a local directory.

Basic Usage

Use the command - line tool to analyze the source code directory and specify the rule set to be used.

Code Duplication Detection

Use the CPD function to detect duplicate code fragments in the code.

Integration into Build Tools

Add the PMD plugin to the Maven or Gradle configuration to achieve automated code inspection.

Usage Examples

Java Project Code Quality Check

Conduct a comprehensive code quality check on a Java Web project, including code specifications, performance issues, potential bugs, etc.

JavaScript Code Duplication Detection

Check if there are duplicate code fragments in the front - end JavaScript project and optimize the code structure.

Team Coding Standard Check

Use a custom rule set to check if the team complies with specific coding standards.

Frequently Asked Questions

What's the difference between PMD and SonarQube?

How to reduce false positives?

Which IDEs does PMD support?

How to customize rules?

Will PMD be slow when analyzing large projects?

Related Resources

Official Documentation

Complete PMD usage documentation and API reference

GitHub Repository

PMD source code and issue tracking

Online Discussion Area

User discussions and technical exchanges

Stack Overflow Tag

Technical question - answering

PMD Guru

AI assistant to help solve PMD - related problems

Docker Image

Official Docker image

🚀 PMD - Source Code Analyzer

PMD is an extensible multilanguage static code analyzer. It can detect common programming flaws such as unused variables, empty catch blocks, and unnecessary object creation. Primarily focused on Java and Apex, it also supports 16 other languages and comes with over 400 built-in rules, which can be extended with custom ones. PMD 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 an XPath query.

🚀 Quick Start

Installation

Download the latest binary zip from the releases and extract it somewhere.

Usage

Execute bin/pmd check or bin\pmd.bat check.

For more details, see Getting Started.

Demo: This shows how PMD analyses openjdk:

There are also plugins for Maven and Gradle, as well as for various IDEs. See Tools / Integrations.

✨ Features

Multilanguage Support: Currently, PMD supports Java, JavaScript, Salesforce.com Apex and Visualforce, Kotlin, Swift, Modelica, PL/SQL, Apache Velocity, JSP, WSDL, Maven POM, HTML, XML, and XSL. Scala is supported, but there are currently no Scala rules available.
Copy-Paste Detection: It includes CPD, the copy-paste-detector, which can find duplicated code in multiple languages such as Coco, C/C++, C#, CSS, Dart, Fortran, Gherkin, Go, Groovy, HTML, Java, JavaScript, JSP, Julia, Kotlin, Lua, Matlab, Modelica, Objective-C, Perl, PHP, PL/SQL, Python, Ruby, Salesforce.com Apex and Visualforce, Scala, Swift, T-SQL, Typescript, Apache Velocity, WSDL, XML, and XSL.
Extensible Rules: Comes with over 400 built-in rules and can be extended with custom rules written in Java or using an XPath query.

📦 Installation

Download the latest binary zip from the releases and extract it. Then execute bin/pmd check (for Unix-like systems) or bin\pmd.bat check (for Windows).

💻 Usage Examples

Basic Usage

Download and extract the binary zip, then run the following command to start code analysis:

bin/pmd check

📚 Documentation

Getting Started: Getting Started
Tools / Integrations: Tools / Integrations
Contributing Guide: How to contribute to PMD

🔧 Technical Details

PMD uses JavaCC and Antlr to parse source files into abstract syntax trees (AST). It then runs rules against these ASTs to find violations. Rules can be written in Java or using an XPath query.