Java Open Source Projects Directory

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. It automates the process of checking Java code to spare humans of this boring (but important) task. This makes it ideal for projects that want to enforce a coding standard. Checkstyle is highly configurable and can be made to support almost any coding standard. An example configuration file is supplied supporting the Sun Code Conventions. As well, other sample configuration files are supplied for other well known conventions. Can be integrated into CruiseControl and Eclipse.

• Category: Code Analyzers
• License:  GNU Library or Lesser General Public License (LGPL)
• HomePage: http://checkstyle.sourceforge.net

FindBugs looks for bugs in Java programs. It can detect a variety of common coding mistakes, including thread synchronization problems, misuse of API methods, etc.

• Category: Code Analyzers
• License:  GNU Library or Lesser General Public License (LGPL)
• HomePage: http://findbugs.sourceforge.net/

The XRadar is an open extensible code report tool that produces HTML/SVG reports of the systems current state and the development over time. Uses DependencyFinder, JDepend, PMD, PMD-CPD, JavaNCSS, Cobertura, Checkstyle, XSource, JUnit, Java2HTML, ant and maven.

• Category: Code Analyzers
• License:  BSD License
• HomePage: http://xradar.sourceforge.net/

Clirr is a tool that checks Java libraries for binary and source 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. The Clirr Ant task 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 or source compatibility problems.

• Category: Code Analyzers
• License:  Apache Software License
• HomePage: http://clirr.sourceforge.net/

Java PathFinder (JPF) is a system to verify executable Java bytecode programs. In its basic form, it is a Java Virtual Machine (JVM) that is used as an explicit state software model checker, systematically exploring all potential execution paths of a program to find violations of properties like deadlocks or unhandled exceptions. Unlike traditional debuggers, JPF reports the entire execution path that leads to a defect. JPF is especially well-suited to finding hard-to-test concurrency defects in multithreaded program

• Category: Code Analyzers
• License:  Other
• HomePage: http://javapathfinder.sourceforge.net/

JDepend traverses Java class file directories and generates design quality metrics for each Java package. JDepend allows you to automatically measure the quality of a design in terms of its extensibility, reusability, and maintainability to effectively manage and control package dependencies.

• Category: Code Analyzers
• License:  BSD License
• HomePage: http://www.clarkware.com/software/JDepend.html

PMD scans Java source code and looks for potential problems like:

 * Unused local variables
 * Empty catch blocks
 * Unused parameters
 * Empty 'if' statements
 * Duplicate import statements
 * Unused private methods
 * Classes which could be Singletons
 * Short/long variable and method names

• Category: Code Analyzers
• License:  BSD License
• HomePage: http://pmd.sourceforge.net/