I'm using eclipse checkstyle plugin with Juno Eclipse distribution. Anytime the code is checked for checkstyle error I get the following error:
cannot initialize module TreeWalker - Unable to instantiate DoubleCheckedLocking
Does anybody know how to fix this problem? Is it a plugin compatibility issue or something else?
The DoubleCheckedLocking check has been removed in Checkstyle 5.6 and must be manually removed from your Checkstyle configuration.
See also: http://sourceforge.net/tracker/index.php?func=detail&aid=3571442&group_id=29721&atid=397078
Open the Checkstyle preferences, create your own Check Configuration, go into your own check configuration, find the TreeWalker module, click it and then un-check the DoubleCheckedLocking. As simple as that.
just comment or remove "DoubleCheckedLocking" from the checkstyle file and it will work
- Under your Eclipse Workspace Search for file internal_config__*.xml
Remove the following line from the file
<module name="DoubleCheckedLocking"/>
Reload Workspace.
This will work for any discontinued module which produces the error message "Unable to instantiate"
来源：https://stackoverflow.com/questions/12795935/checkstyle-eclipse-plugin-doesnt-work