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Bug? Unused field warning disappears when annotations used. [message #1820922]

Fri, 31 January 2020 20:11

Michael Mast

Messages: 5
Registered: September 2014

Junior Member

If a class definition contains an unused field, the Eclipse IDE displays a warning icon in the border:

https://1drv.ms/u/s!Aln8SgBjSZM-gbUcn7qOGUkx7m1vYQ?e=1QwyEg

But if an annotation is specified, the warning goes away, even though the field is still not used.

https://1drv.ms/u/s!Aln8SgBjSZM-gbUbPOjdmhvzPDDUDQ?e=JccBcW

Is this a bug?

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Re: Bug? Unused field warning disappears when annotations used. [message #1820925 is a reply to message #1820922]

Sat, 01 February 2020 02:03

Brian de Alwis

Messages: 877
Registered: January 2012

Senior Member

I'll assume this is a Hibernate @Type annotation? The following is speculation on my part. This annotation is marked as having RUNTIME retention, meaning that it is written out to the class file and available for querying using reflection at runtime. As such, the field may be accessed, even if there isn't a direct reference within the class.

Brian.

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