rspec/rules/S4029/java/rule.adoc

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2021-04-28 16:49:39 +02:00
With Java 8, there's no need to write ``++Comparator++``s that compare primitive values or other ``++Comparable++``s; they can be generated for you using the ``++Comparator.comparing*++`` functions: ``++comparing++``, ``++comparingDouble++``, ``++comparingInt++``, ``++comparingLong++``.
*Note* that this rule is automatically disabled when the project's ``++sonar.java.source++`` is lower than ``++8++``.
== Noncompliant Code Example
----
unparsedFiles.stream()
.sorted((f1, f2) -> f1.lines - f2.lines) // Noncompliant
.limit(30);
----
== Compliant Solution
----
unparsedFiles.stream()
.sorted(Comparator.comparingInt(UnparsedFile::getLines()))
.limit(30);
----