Use modernized java.util APIs

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.JavaUtilAPIs

If the recipe isn’t available locally, install it with:

mod config recipes jar install org.openrewrite.recipe:rewrite-migrate-java:3.41.0

Definition

This recipe runs the following recipes in order.

• Replace iterator().next() with getFirst()org.openrewrite.java.migrate.util.IteratorNext
• Replace List.get(int), add(int, Object), and remove(int) with SequencedCollection *First and *Last methodsorg.openrewrite.java.migrate.util.ListFirstAndLast
• Prefer List.of()org.openrewrite.java.migrate.util.MigrateCollectionsEmptyList
• Prefer Map.of()org.openrewrite.java.migrate.util.MigrateCollectionsEmptyMap
• Prefer Set.of()org.openrewrite.java.migrate.util.MigrateCollectionsEmptySet
• Prefer List.of(..)org.openrewrite.java.migrate.util.MigrateCollectionsSingletonList
• Prefer Map.of(..)org.openrewrite.java.migrate.util.MigrateCollectionsSingletonMap
• Prefer Set.of(..)org.openrewrite.java.migrate.util.MigrateCollectionsSingletonSet
• Prefer List.of(..)org.openrewrite.java.migrate.util.MigrateCollectionsUnmodifiableList
• Prefer Set.of(..)org.openrewrite.java.migrate.util.MigrateCollectionsUnmodifiableSet
• Use Reader.of(CharSequence) for non-synchronized readersorg.openrewrite.java.migrate.util.MigrateStringReaderToReaderOf
• Prefer Optional.isPresent()org.openrewrite.java.migrate.util.OptionalNotEmptyToIsPresent
• Prefer Optional.isEmpty()org.openrewrite.java.migrate.util.OptionalNotPresentToIsEmpty
• Stream<Optional> idiom recipeorg.openrewrite.java.migrate.util.OptionalStreamRecipe
• Remove invocations of deprecated invocations from Deflater, Inflater, ZipFile org.openrewrite.java.migrate.util.RemoveFinalizerFromZip
• Replace java.lang.Math random() with ThreadLocalRandom nextDouble()org.openrewrite.java.migrate.util.ReplaceMathRandomWithThreadLocalRandomRecipe
• Replace Stream.collect(Collectors.toUnmodifiableList()) with Stream.toList()org.openrewrite.java.migrate.util.ReplaceStreamCollectWithToList
• Use getFirst() instead of stream().findFirst().orElseThrow()org.openrewrite.java.migrate.util.StreamFindFirst
• Prefer EnumSet of(..)org.openrewrite.java.migrate.util.UseEnumSetOf
• Prefer List.of(..)org.openrewrite.java.migrate.util.UseListOf
• Prefer Locale.of(..) over new Locale(..)org.openrewrite.java.migrate.util.UseLocaleOf
• Prefer Map.of(..)org.openrewrite.java.migrate.util.UseMapOf
• Prefer Predicate.not(..) over casting to Predicate and calling negate()org.openrewrite.java.migrate.util.UsePredicateNot
• Prefer Set.of(..)org.openrewrite.java.migrate.util.UseSetOf

Data 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