[S1128] SonarLint pugin for IntelliJ - false report for unused imports in Java records

[MartinBG (Martin)]

Hello,

Most probably you’re already aware about this issue, but I failed to find a report for it.

SonarLint plugin for IntelliJ marks any imports used as property type by JDK16 records as unused.

Versions used:

• InteliJ: IntelliJ IDEA 2021.1 (Ultimate Edition) Build #IU-211.6693.111
• SonarLint plugin for InteliJ: 4.14.2.28348
• JDK 16 (AdoptOpenJDK 16.0.0.j9)

Minimal code sample to reproduce:

import java.time.LocalDate; //SonarLint: Remove this unused import 'java.time.LocalDate'. 

public record Test(LocalDate localDate) { }

These are the details on the warning:

Unnecessary imports should be removed
 
Code smell
 
Minor
java:S1128

The imports part of a file should be handled by the Integrated Development Environment (IDE), not manually by the developer.
Unused and useless imports should not occur if that is the case.
Leaving them in reduces the code's readability, since their presence can be confusing.

[Colin]

Hey there.

A very similar reseponse here as to your other post:

[S3958] Stream#toList (JDK 16) is not recognized as terminal operator

Hey @MartinBG This should be addressed when we bring full support of Java 16 to our products: you can track SONARJAVA-3746 for this specific case and MMF-2317 for the broader effort. This all has a dependency on the release of a new version of the ECJ (SONARJAVA-3738) so probably early summertime.

Except the specific ticket this time is SONARJAVA-3799

Thanks for both of your detailed reports.