Yesterday, Tom Copeland released the PMD plugin for the JDeveloper 10.1.3. Preview Release.
After a short investigation of the plugin, I upgraded it to JDeveloper 10.1.3 Early Access and it is now available for usage through the JDeveloper Update Center. Simply add a new entry to your update center with:
Name: PMD Update Center
Location: http://pmd.sf.net/center.xml
In his blog entry Good times with Oracle JDeveloper update center, Tom explains how to support the Update Center.