Prefer Set.of(..)
Recipe ID
org.openrewrite.java.migrate.util.UseSetOfArtifact
org.openrewrite.recipe:rewrite-migrate-javaPrefer Set.of(..) in Java 10 or higher. Two input shapes are recognised:
- Anonymous-class initialization (new HashSet<>() {{ add("a"); add("b"); }}), which is replaced wholesale with Set.of("a", "b") (immutable result, matching the anonymous-class idiom's typical intent).
- A new HashSet<>() declaration followed by a chain of target.add(..) statements, which is collapsed to new HashSet<>(Set.of(..)) (preserving the mutable HashSet).
Usage
This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.
mod run . --recipe org.openrewrite.java.migrate.util.UseSetOfIf the recipe isn’t available locally, install it with:
mod config recipes jar install org.openrewrite.recipe:rewrite-migrate-java:3.41.0Data tables
Structured output this recipe can produce.
- Source files that had resultsSource files that were modified by the recipe run.
org.openrewrite.table.SourcesFileResults - Source files that had search resultsSearch results that were found during the recipe run.
org.openrewrite.table.SearchResults - Source files that errored on a recipeThe details of all errors produced by a recipe run.
org.openrewrite.table.SourcesFileErrors - Recipe performanceStatistics used in analyzing the performance of recipes.
org.openrewrite.table.RecipeRunStats