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[ JDK VERSION : 1.7.7 ] As you can see from the screenshot the hint "create class... WinRegJNA" occurs twice. Perhaps one time would be enough... even if the error on the line occurs twice...
Created attachment 124775 [details] Screenshot
Reproducible One hint creates inner class and the second creates inner class with constructor, the display name of the second should be changes to something like 'Create class XY with constructor XY(int) in package xyz' as it already works for top level class
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