[NETBEANS-5379] Warning hint "Unused Element" can't be suppressed

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 12.2
• Component/s: java - Hints
• Assignee: Unassigned
• Reporter: Niklas Matthies
• Created: 20/Feb/21 21:26
• Updated: 20/Feb/21 21:26

Description

The hint "Unused Element" (category "Probably Bugs") can't be suppressed, it seems. In particular, @SuppressWarnings("unused") doesn't suppress it.

One concrete use case I have is a try-with-resources where the resource variable is not used in the try block. (Of course, it is implicitly used for close()-ing the resource.) NetBeans generates a warning (which is fine, the code could indeed be wrong) which however can't be suppressed. Previously (last tested in 12.0), @SuppressWarnings("try") would do the trick.

This isn't the first time a warning hint was introduced without a way to suppress it. I'd like to suggest to always, as a rule, without exception, add a suppression constant, because there are invariably cases where a warning is a false positive.