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I wanted to see the javac serialization warning in my file, so enabled it in tools->options->editor->hints, but when i returned to my file i saw no warning, i closed the file and opened it again and warning appeared. Product Version: NetBeans IDE Dev (Build 201210170002) Java: 1.7.0_05; Java HotSpot(TM) 64-Bit Server VM 23.1-b03 System: Windows 7 version 6.1 running on amd64; Cp1252; en_US (nb)
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