checks Java source against a coding standard

 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.
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 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.