Eclipse losing track of files?

One of the most annoying things about Eclipse is the way it manages files and will refuse to open anything which has been edited outside of the IDE, typically it will throw a ResourceException with the message showing “Resource is out of sync with the file system”.

This problem can be alleviated by either right clicking on the file and selecting “Refresh”, or if you find it happening frequently, Go to Preferences -> Workspace and enable the “Refresh Automatically” option, do note it appears Eclipse updates on a timer, not when you open the file, so it may take a while to detect the change. (You got a better method? or am I wrong? leave a comment and let me know).