Harmonize Stream.collect() usage

use Stream.toList() or collect(Collectors.toSet()) where possible.

See gh-36509

buildSrc/src/main/java/org/springframework/boot/build/bom/bomr/StandardLibraryUpdateResolver.java

@@ -19,12 +19,10 @@ package org.springframework.boot.build.bom.bomr;
 import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.SortedSet;
-import java.util.stream.Collectors;
 
 import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
 import org.slf4j.Logger;
@@ -98,19 +96,14 @@ class StandardLibraryUpdateResolver implements LibraryUpdateResolver {
 						getLaterVersionsForModule(group.getId(), plugin, libraryVersion));
 			}
 		}
-		List<DependencyVersion> allVersions = moduleVersions.values()
+		return moduleVersions.values()
 			.stream()
 			.flatMap(SortedSet::stream)
 			.distinct()
 			.filter((dependencyVersion) -> isPermitted(dependencyVersion, library.getProhibitedVersions()))
-			.toList();
-		if (allVersions.isEmpty()) {
-			return Collections.emptyList();
-		}
-		return allVersions.stream()
-			.map((version) -> new VersionOption.ResolvedVersionOption(version,
+			.map((version) -> (VersionOption) new VersionOption.ResolvedVersionOption(version,
 					getMissingModules(moduleVersions, version)))
-			.collect(Collectors.toList());
+			.toList();
 	}
 
 	private boolean isPermitted(DependencyVersion dependencyVersion, List<ProhibitedVersion> prohibitedVersions) {

ci/images/releasescripts/src/test/java/io/spring/concourse/releasescripts/sonatype/SonatypeServiceTests.java

@@ -21,7 +21,6 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Arrays;
-import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -105,7 +104,7 @@ class SonatypeServiceTests {
 					.filter((artifact) -> !artifact.startsWith("build-info.json"))
 					.map((artifact) -> requestTo(
 							"/service/local/staging/deployByRepositoryId/example-6789/" + artifact.toString()))
-					.collect(Collectors.toCollection(HashSet::new));
+					.collect(Collectors.toSet());
 			AnyOfRequestMatcher uploadRequestsMatcher = anyOf(uploads);
 			assertThat(uploadRequestsMatcher.candidates).hasSize(150);
 			this.server.expect(ExpectedCount.times(150), uploadRequestsMatcher).andExpect(method(HttpMethod.PUT))
@@ -157,7 +156,7 @@ class SonatypeServiceTests {
 					.filter((artifact) -> !"build-info.json".equals(artifact.toString()))
 					.map((artifact) -> requestTo(
 							"/service/local/staging/deployByRepositoryId/example-6789/" + artifact.toString()))
-					.collect(Collectors.toCollection(HashSet::new));
+					.collect(Collectors.toSet());
 			AnyOfRequestMatcher uploadRequestsMatcher = anyOf(uploads);
 			assertThat(uploadRequestsMatcher.candidates).hasSize(150);
 			this.server.expect(ExpectedCount.times(150), uploadRequestsMatcher).andExpect(method(HttpMethod.PUT))

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/util/Instantiator.java

@@ -17,7 +17,6 @@
 package org.springframework.boot.util;
 
 import java.lang.reflect.Constructor;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
@@ -28,7 +27,6 @@ import java.util.Map;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
-import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import org.springframework.core.annotation.AnnotationAwareOrderComparator;
@@ -139,9 +137,7 @@ public class Instantiator<T> {
 	}
 
 	private List<T> instantiate(Stream<TypeSupplier> typeSuppliers) {
-		List<T> instances = typeSuppliers.map(this::instantiate).collect(Collectors.toCollection(ArrayList::new));
-		AnnotationAwareOrderComparator.sort(instances);
-		return Collections.unmodifiableList(instances);
+		return typeSuppliers.map(this::instantiate).sorted(AnnotationAwareOrderComparator.INSTANCE).toList();
 	}
 
 	private T instantiate(TypeSupplier typeSupplier) {