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javasonarqubejava-streamsonarlintjava-17

Why does SonarQube is showing the message for all Java Streams: Refactor the code so this stream pipeline is used.?

I have a Java project running in Java 17 version. I have pushed my code to the organization repository where SonarQube is running. In that repository, I am getting issues/bugs for all the Java Streams List that I have used in my project. Even for the simple ones.

Can someone please inform me why am I getting the issue for following Java Streams?

1. return input.stream().filter(Objects::nonNull).toList();

2. return input.stream().map(String::toLowerCase).toList();

3. return input.stream().filter(Objects::nonNull).map(i -> DOMAIN + "/" + i).toList();

For all the above mentioned Java Streams I am getting the following issue:

Refactor the code so this stream pipeline is used.

I tried to use the .collect(Collectors.toList()); instead of .toList();, if I do that then my Intellij/SonarLint shows that I need to use the .toList();. So I am bit confused.

Can someone please tell me what's wrong with these Java Streams? I do not have any issue with this?

Solution

  • Posting the answer as it can be helpful to someone in the future:

    This was happening because the SonarQube was using the old version. I updated the SonarQube and this error vanished.

    The issue was happening in some 6.3.x version I updated it to 9.x version and everything is solved now.