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I often forget to code it.
It is already implemented See Options -> Editor -> Hints -> Standard javac warnings there is hint 'Fallthrough', just turn it on
Sorry and thanks!
Please consider turning this on by default. JDK 8 compiler warns about it, so you should as well. I didn't know about this option until I've found this issue.
Reset assignee and changing to defect, as I think the warnings in the editor should be consistent with javac.
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss
Created attachment 160332 [details] Shows the enablement state of javac hints
Still valid in 8.2 dev Product Version: NetBeans IDE Dev (Build 201607100002)