Call String.toLowerCase and .toUppercase with explicit locale

mhalbritter · mhalbritter · commit a3060652f8d2 · 2024-10-17T13:20:39.000+02:00
Closes gh-42719
diff --git a/buildSrc/src/main/java/org/springframework/boot/build/AsciidoctorConventions.java b/buildSrc/src/main/java/org/springframework/boot/build/AsciidoctorConventions.java
@@ -19,6 +19,7 @@
 import java.io.File;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 
 import org.asciidoctor.gradle.jvm.AbstractAsciidoctorTask;
@@ -111,7 +112,7 @@ private void configureAsciidoctorTask(Project project, AbstractAsciidoctorTask a
 		asciidoctorTask.baseDirFollowsSourceDir();
 		createSyncDocumentationSourceTask(project, asciidoctorTask);
 		if (asciidoctorTask instanceof AsciidoctorTask task) {
-			boolean pdf = task.getName().toLowerCase().contains("pdf");
+			boolean pdf = task.getName().toLowerCase(Locale.ROOT).contains("pdf");
 			String backend = (!pdf) ? "spring-html" : "spring-pdf";
 			task.outputOptions((outputOptions) -> outputOptions.backends(backend));
 		}
diff --git a/buildSrc/src/main/java/org/springframework/boot/build/properties/BuildType.java b/buildSrc/src/main/java/org/springframework/boot/build/properties/BuildType.java
@@ -16,6 +16,8 @@
 
 package org.springframework.boot.build.properties;
 
+import java.util.Locale;
+
 /**
  * The type of build being performed.
  *
@@ -34,7 +36,7 @@ public enum BuildType {
 	COMMERCIAL;
 
 	public String toIdentifier() {
-		return toString().replace("_", "").toLowerCase();
+		return toString().replace("_", "").toLowerCase(Locale.ROOT);
 	}
 
 }
diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/condition/OnAvailableEndpointCondition.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/condition/OnAvailableEndpointCondition.java
@@ -20,6 +20,7 @@
 import java.util.EnumSet;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
@@ -118,7 +119,7 @@ private ConditionOutcome getMatchOutcome(Environment environment,
 		for (ExposureFilter exposureFilter : exposureFilters) {
 			if (exposuresToCheck.contains(exposureFilter.getExposure()) && exposureFilter.isExposed(endpointId)) {
 				return ConditionOutcome.match(message.because("marked as exposed by a 'management.endpoints."
-						+ exposureFilter.getExposure().name().toLowerCase() + ".exposure' property"));
+						+ exposureFilter.getExposure().name().toLowerCase(Locale.ROOT) + ".exposure' property"));
 			}
 		}
 		return ConditionOutcome.noMatch(message.because("no 'management.endpoints' property marked it as exposed"));
@@ -187,7 +188,7 @@ private static String getCanonicalName(EndpointExposure exposure) {
 			if (EndpointExposure.CLOUD_FOUNDRY.equals(exposure)) {
 				return "cloud-foundry";
 			}
-			return exposure.name().toLowerCase();
+			return exposure.name().toLowerCase(Locale.ROOT);
 		}
 
 		EndpointExposure getExposure() {
diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/otlp/OtlpTracingConfigurations.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/otlp/OtlpTracingConfigurations.java
@@ -16,6 +16,7 @@
 
 package org.springframework.boot.actuate.autoconfigure.tracing.otlp;
 
+import java.util.Locale;
 import java.util.Map.Entry;
 
 import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporter;
@@ -78,7 +79,7 @@ OtlpHttpSpanExporter otlpHttpSpanExporter(OtlpProperties properties,
 			OtlpHttpSpanExporterBuilder builder = OtlpHttpSpanExporter.builder()
 				.setEndpoint(connectionDetails.getUrl())
 				.setTimeout(properties.getTimeout())
-				.setCompression(properties.getCompression().name().toLowerCase());
+				.setCompression(properties.getCompression().name().toLowerCase(Locale.ROOT));
 			for (Entry<String, String> header : properties.getHeaders().entrySet()) {
 				builder.addHeader(header.getKey(), header.getValue());
 			}
diff --git a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/exchanges/HttpExchange.java b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/exchanges/HttpExchange.java
@@ -25,6 +25,7 @@
 import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import java.util.function.Supplier;
@@ -434,7 +435,7 @@ private static class HeadersFilter {
 
 		void excludeUnless(String header, Include exception) {
 			if (!this.includes.contains(exception)) {
-				this.filteredHeaderNames.add(header.toLowerCase());
+				this.filteredHeaderNames.add(header.toLowerCase(Locale.ROOT));
 			}
 		}
 
@@ -444,7 +445,7 @@ Map<String, List<String>> apply(Map<String, List<String>> headers) {
 			}
 			Map<String, List<String>> filtered = new LinkedHashMap<>();
 			headers.forEach((name, value) -> {
-				if (!this.filteredHeaderNames.contains(name.toLowerCase())) {
+				if (!this.filteredHeaderNames.contains(name.toLowerCase(Locale.ROOT))) {
 					filtered.put(name, value);
 				}
 			});
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/annotation/DiscoveredOperationMethodTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/annotation/DiscoveredOperationMethodTests.java
@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.endpoint.annotation;
 
 import java.lang.reflect.Method;
+import java.util.Locale;
 
 import org.junit.jupiter.api.Test;
 
@@ -76,7 +77,7 @@ enum ExampleProducible implements Producible<ExampleProducible> {
 
 		@Override
 		public MimeType getProducedMimeType() {
-			return new MimeType(toString().toLowerCase());
+			return new MimeType(toString().toLowerCase(Locale.ROOT));
 		}
 
 	}
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/annotation/DiscoveredOperationsFactoryTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/annotation/DiscoveredOperationsFactoryTests.java
@@ -20,6 +20,7 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 import org.junit.jupiter.api.BeforeEach;
@@ -254,7 +255,7 @@ enum ExampleProducible implements Producible<ExampleProducible> {
 
 		@Override
 		public MimeType getProducedMimeType() {
-			return new MimeType(toString().toLowerCase());
+			return new MimeType(toString().toLowerCase(Locale.ROOT));
 		}
 
 	}
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/server/servlet/OAuth2AuthorizationServerPropertiesMapper.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/server/servlet/OAuth2AuthorizationServerPropertiesMapper.java
@@ -18,6 +18,7 @@
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Locale;
 
 import org.springframework.boot.autoconfigure.security.oauth2.server.servlet.OAuth2AuthorizationServerProperties.Client;
 import org.springframework.boot.autoconfigure.security.oauth2.server.servlet.OAuth2AuthorizationServerProperties.Registration;
@@ -123,7 +124,7 @@ private TokenSettings getTokenSettings(Client client, PropertyMapper map) {
 	}
 
 	private JwsAlgorithm jwsAlgorithm(String signingAlgorithm) {
-		String name = signingAlgorithm.toUpperCase();
+		String name = signingAlgorithm.toUpperCase(Locale.ROOT);
 		JwsAlgorithm jwsAlgorithm = SignatureAlgorithm.from(name);
 		if (jwsAlgorithm == null) {
 			jwsAlgorithm = MacAlgorithm.from(name);
@@ -132,7 +133,7 @@ private JwsAlgorithm jwsAlgorithm(String signingAlgorithm) {
 	}
 
 	private SignatureAlgorithm signatureAlgorithm(String signatureAlgorithm) {
-		return SignatureAlgorithm.from(signatureAlgorithm.toUpperCase());
+		return SignatureAlgorithm.from(signatureAlgorithm.toUpperCase(Locale.ROOT));
 	}
 
 }
diff --git a/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/livereload/Connection.java b/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/livereload/Connection.java
@@ -24,6 +24,7 @@
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.Base64;
+import java.util.Locale;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -81,7 +82,7 @@ class Connection {
 	 * @throws Exception in case of errors
 	 */
 	void run() throws Exception {
-		String lowerCaseHeader = this.header.toLowerCase();
+		String lowerCaseHeader = this.header.toLowerCase(Locale.ROOT);
 		if (lowerCaseHeader.contains("upgrade: websocket") && lowerCaseHeader.contains("sec-websocket-version: 13")) {
 			runWebSocket();
 		}
diff --git a/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/livereload/LiveReloadServerTests.java b/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/livereload/LiveReloadServerTests.java
@@ -27,6 +27,7 @@
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import java.util.concurrent.Callable;
@@ -338,7 +339,7 @@ private static class UppercaseWebSocketClientConfigurator extends Configurator {
 		@Override
 		public void beforeRequest(Map<String, List<String>> requestHeaders) {
 			Map<String, List<String>> uppercaseRequestHeaders = new LinkedHashMap<>();
-			requestHeaders.forEach((key, value) -> uppercaseRequestHeaders.put(key.toUpperCase(), value));
+			requestHeaders.forEach((key, value) -> uppercaseRequestHeaders.put(key.toUpperCase(Locale.ROOT), value));
 			requestHeaders.clear();
 			requestHeaders.putAll(uppercaseRequestHeaders);
 			requestHeaders.putAll(this.headers);
diff --git a/spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/core/ProcessRunner.java b/spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/core/ProcessRunner.java
@@ -23,6 +23,7 @@
 import java.io.InputStreamReader;
 import java.io.UncheckedIOException;
 import java.nio.charset.StandardCharsets;
+import java.util.Locale;
 import java.util.concurrent.CountDownLatch;
 import java.util.function.Consumer;
 
@@ -42,7 +43,7 @@ class ProcessRunner {
 
 	private static final String USR_LOCAL_BIN = "/usr/local/bin";
 
-	private static final boolean MAC_OS = System.getProperty("os.name").toLowerCase().contains("mac");
+	private static final boolean MAC_OS = System.getProperty("os.name").toLowerCase(Locale.ROOT).contains("mac");
 
 	private static final Log logger = LogFactory.getLog(ProcessRunner.class);
 
diff --git a/spring-boot-project/spring-boot-docs/src/main/java/org/springframework/boot/docs/messaging/kafka/streams/MyKafkaStreamsConfiguration.java b/spring-boot-project/spring-boot-docs/src/main/java/org/springframework/boot/docs/messaging/kafka/streams/MyKafkaStreamsConfiguration.java
@@ -16,6 +16,8 @@
 
 package org.springframework.boot.docs.messaging.kafka.streams;
 
+import java.util.Locale;
+
 import org.apache.kafka.common.serialization.Serdes;
 import org.apache.kafka.streams.KeyValue;
 import org.apache.kafka.streams.StreamsBuilder;
@@ -39,7 +41,7 @@ public KStream<Integer, String> kStream(StreamsBuilder streamsBuilder) {
 	}
 
 	private KeyValue<Integer, String> uppercaseValue(Integer key, String value) {
-		return new KeyValue<>(key, value.toUpperCase());
+		return new KeyValue<>(key, value.toUpperCase(Locale.getDefault()));
 	}
 
 }
diff --git a/spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/filter/StandardAnnotationCustomizableTypeExcludeFilter.java b/spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/filter/StandardAnnotationCustomizableTypeExcludeFilter.java
@@ -18,6 +18,7 @@
 
 import java.lang.annotation.Annotation;
 import java.util.Collections;
+import java.util.Locale;
 import java.util.Set;
 
 import org.springframework.context.annotation.ComponentScan.Filter;
@@ -45,7 +46,7 @@ public abstract class StandardAnnotationCustomizableTypeExcludeFilter<A extends
 		FilterType[] filterValues = FilterType.values();
 		FILTER_TYPE_ATTRIBUTES = new String[filterValues.length];
 		for (int i = 0; i < filterValues.length; i++) {
-			FILTER_TYPE_ATTRIBUTES[i] = filterValues[i].name().toLowerCase() + "Filters";
+			FILTER_TYPE_ATTRIBUTES[i] = filterValues[i].name().toLowerCase(Locale.ROOT) + "Filters";
 		}
 	}
 
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/ImageReference.java b/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/ImageReference.java
@@ -187,7 +187,7 @@ public ImageReference inTaggedOrDigestForm() {
 	 */
 	public static ImageReference forJarFile(File jarFile) {
 		String filename = jarFile.getName();
-		Assert.isTrue(filename.toLowerCase().endsWith(".jar"), () -> "File '" + jarFile + "' is not a JAR");
+		Assert.isTrue(filename.toLowerCase(Locale.ROOT).endsWith(".jar"), () -> "File '" + jarFile + "' is not a JAR");
 		filename = filename.substring(0, filename.length() - 4);
 		int firstDot = filename.indexOf('.');
 		if (firstDot == -1) {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/AbstractBootArchiveIntegrationTests.java b/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/AbstractBootArchiveIntegrationTests.java
@@ -625,7 +625,7 @@ private void copyMainClassApplication() throws IOException {
 
 	protected void copyApplication(String name) throws IOException {
 		File output = new File(this.gradleBuild.getProjectDir(),
-				"src/main/java/com/example/" + this.taskName.toLowerCase() + "/" + name);
+				"src/main/java/com/example/" + this.taskName.toLowerCase(Locale.ROOT) + "/" + name);
 		output.mkdirs();
 		FileSystemUtils.copyRecursively(
 				new File("src/test/java/com/example/" + this.taskName.toLowerCase(Locale.ENGLISH) + "/" + name),
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-jarmode-layertools/src/main/java/org/springframework/boot/jarmode/layertools/Context.java b/spring-boot-project/spring-boot-tools/spring-boot-jarmode-layertools/src/main/java/org/springframework/boot/jarmode/layertools/Context.java
@@ -25,6 +25,7 @@
 import java.nio.file.Paths;
 import java.security.CodeSource;
 import java.security.ProtectionDomain;
+import java.util.Locale;
 import java.util.jar.JarFile;
 
 import org.springframework.util.Assert;
@@ -67,7 +68,7 @@ private boolean isExistingFile(File archiveFile) {
 	}
 
 	private boolean isJarOrWar(File jarFile) {
-		String name = jarFile.getName().toLowerCase();
+		String name = jarFile.getName().toLowerCase(Locale.ROOT);
 		return name.endsWith(".jar") || name.endsWith(".war");
 	}
 
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/FileUtils.java b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/FileUtils.java
@@ -18,6 +18,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Locale;
 import java.util.jar.Attributes;
 import java.util.jar.JarFile;
 import java.util.jar.Manifest;
@@ -88,7 +89,7 @@ private static boolean hasDigestName(Attributes attributes) {
 	}
 
 	private static boolean isDigestName(Object name) {
-		return String.valueOf(name).toUpperCase().endsWith("-DIGEST");
+		return String.valueOf(name).toUpperCase(Locale.ROOT).endsWith("-DIGEST");
 	}
 
 }
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Layer.java b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Layer.java
@@ -16,6 +16,7 @@
 
 package org.springframework.boot.loader.tools;
 
+import java.util.Locale;
 import java.util.regex.Pattern;
 
 import org.springframework.util.Assert;
@@ -41,7 +42,7 @@ public class Layer {
 	public Layer(String name) {
 		Assert.hasText(name, "Name must not be empty");
 		Assert.isTrue(PATTERN.matcher(name).matches(), () -> "Malformed layer name '" + name + "'");
-		Assert.isTrue(!name.equalsIgnoreCase("ext") && !name.toLowerCase().startsWith("springboot"),
+		Assert.isTrue(!name.equalsIgnoreCase("ext") && !name.toLowerCase(Locale.ROOT).startsWith("springboot"),
 				() -> "Layer name '" + name + "' is reserved");
 		this.name = name;
 	}
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java
@@ -19,6 +19,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.attribute.FileTime;
+import java.util.Locale;
 import java.util.Map;
 import java.util.jar.JarFile;
 
@@ -50,7 +51,7 @@ public Repackager(File source) {
 	@Override
 	protected void writeSignatureFileIfNecessary(Map<String, Library> writtenLibraries, AbstractJarWriter writer)
 			throws IOException {
-		if (getSource().getName().toLowerCase().endsWith(".jar") && hasSignedLibrary(writtenLibraries)) {
+		if (getSource().getName().toLowerCase(Locale.ROOT).endsWith(".jar") && hasSignedLibrary(writtenLibraries)) {
 			writer.writeEntry("META-INF/BOOT.SF", (entryWriter) -> {
 			});
 		}
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarFileUrlKey.java b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarFileUrlKey.java
@@ -18,6 +18,7 @@
 
 import java.lang.ref.SoftReference;
 import java.net.URL;
+import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -54,10 +55,10 @@ private static String create(URL url) {
 		String host = url.getHost();
 		int port = (url.getPort() != -1) ? url.getPort() : url.getDefaultPort();
 		String file = url.getFile();
-		value.append(protocol.toLowerCase());
+		value.append(protocol.toLowerCase(Locale.ROOT));
 		value.append(":");
 		if (host != null && !host.isEmpty()) {
-			value.append(host.toLowerCase());
+			value.append(host.toLowerCase(Locale.ROOT));
 			value.append((port != -1) ? ":" + port : "");
 		}
 		value.append((file != null) ? file : "");
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/process/DisabledIfProcessUnavailableCondition.java b/spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/process/DisabledIfProcessUnavailableCondition.java
@@ -19,6 +19,7 @@
 import java.lang.reflect.AnnotatedElement;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Locale;
 import java.util.concurrent.TimeUnit;
 import java.util.stream.Stream;
 
@@ -42,7 +43,7 @@ class DisabledIfProcessUnavailableCondition implements ExecutionCondition {
 
 	private static final String USR_LOCAL_BIN = "/usr/local/bin";
 
-	private static final boolean MAC_OS = System.getProperty("os.name").toLowerCase().contains("mac");
+	private static final boolean MAC_OS = System.getProperty("os.name").toLowerCase(Locale.ROOT).contains("mac");
 
 	@Override
 	public ConditionEvaluationResult evaluateExecutionCondition(ExtensionContext context) {
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/env/ConfigTreePropertySource.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/env/ConfigTreePropertySource.java
@@ -26,6 +26,7 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.EnumSet;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeMap;
@@ -212,7 +213,7 @@ static Map<String, PropertyFile> findAll(Path sourceDirectory, Set<Option> optio
 						String name = getName(sourceDirectory.relativize(path));
 						if (StringUtils.hasText(name)) {
 							if (options.contains(Option.USE_LOWERCASE_NAMES)) {
-								name = name.toLowerCase();
+								name = name.toLowerCase(Locale.getDefault());
 							}
 							propertyFiles.put(name, new PropertyFile(path, options));
 						}
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/server/PortInUseException.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/server/PortInUseException.java
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/SpringConfigurationPropertySourceTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/SpringConfigurationPropertySourceTests.java
diff --git a/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/dockerTest/java/org/springframework/boot/launchscript/AbstractLaunchScriptIntegrationTests.java b/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/dockerTest/java/org/springframework/boot/launchscript/AbstractLaunchScriptIntegrationTests.java

Original file line number	Diff line number	Diff line change
`@@ -16,6 +16,8 @@`
`16`	`16`
`17`	`17`	`package org.springframework.boot.build.properties;`
`18`	`18`
	`19`	`+import java.util.Locale;`
	`20`	`+`
`19`	`21`	`/**`
`20`	`22`	`* The type of build being performed.`
`21`	`23`	`*`
`@@ -34,7 +36,7 @@ public enum BuildType {`
`34`	`36`	`COMMERCIAL;`
`35`	`37`
`36`	`38`	`public String toIdentifier() {`
`37`		`- return toString().replace("_", "").toLowerCase();`
	`39`	`+ return toString().replace("_", "").toLowerCase(Locale.ROOT);`
`38`	`40`	`}`
`39`	`41`
`40`	`42`	`}`
Original file line number	Diff line number	Diff line change
`@@ -20,6 +20,7 @@`
`20`	`20`	`import java.util.EnumSet;`
`21`	`21`	`import java.util.HashSet;`
`22`	`22`	`import java.util.LinkedHashSet;`
	`23`	`+import java.util.Locale;`
`23`	`24`	`import java.util.Map;`
`24`	`25`	`import java.util.Optional;`
`25`	`26`	`import java.util.Set;`
`@@ -118,7 +119,7 @@ private ConditionOutcome getMatchOutcome(Environment environment,`
`118`	`119`	`for (ExposureFilter exposureFilter : exposureFilters) {`
`119`	`120`	`if (exposuresToCheck.contains(exposureFilter.getExposure()) && exposureFilter.isExposed(endpointId)) {`
`120`	`121`	`return ConditionOutcome.match(message.because("marked as exposed by a 'management.endpoints."`
`121`		`- + exposureFilter.getExposure().name().toLowerCase() + ".exposure' property"));`
	`122`	`+ + exposureFilter.getExposure().name().toLowerCase(Locale.ROOT) + ".exposure' property"));`
`122`	`123`	`}`
`123`	`124`	`}`
`124`	`125`	`return ConditionOutcome.noMatch(message.because("no 'management.endpoints' property marked it as exposed"));`
`@@ -187,7 +188,7 @@ private static String getCanonicalName(EndpointExposure exposure) {`
`187`	`188`	`if (EndpointExposure.CLOUD_FOUNDRY.equals(exposure)) {`
`188`	`189`	`return "cloud-foundry";`
`189`	`190`	`}`
`190`		`- return exposure.name().toLowerCase();`
	`191`	`+ return exposure.name().toLowerCase(Locale.ROOT);`
`191`	`192`	`}`
`192`	`193`
`193`	`194`	`EndpointExposure getExposure() {`
Original file line number	Diff line number	Diff line change
`@@ -25,6 +25,7 @@`
`25`	`25`	`import java.util.HashSet;`
`26`	`26`	`import java.util.LinkedHashMap;`
`27`	`27`	`import java.util.List;`
	`28`	`+import java.util.Locale;`
`28`	`29`	`import java.util.Map;`
`29`	`30`	`import java.util.Set;`
`30`	`31`	`import java.util.function.Supplier;`
`@@ -434,7 +435,7 @@ private static class HeadersFilter {`
`434`	`435`
`435`	`436`	`void excludeUnless(String header, Include exception) {`
`436`	`437`	`if (!this.includes.contains(exception)) {`
`437`		`- this.filteredHeaderNames.add(header.toLowerCase());`
	`438`	`+ this.filteredHeaderNames.add(header.toLowerCase(Locale.ROOT));`
`438`	`439`	`}`
`439`	`440`	`}`
`440`	`441`
`@@ -444,7 +445,7 @@ Map<String, List<String>> apply(Map<String, List<String>> headers) {`
`444`	`445`	`}`
`445`	`446`	`Map<String, List<String>> filtered = new LinkedHashMap<>();`
`446`	`447`	`headers.forEach((name, value) -> {`
`447`		`- if (!this.filteredHeaderNames.contains(name.toLowerCase())) {`
	`448`	`+ if (!this.filteredHeaderNames.contains(name.toLowerCase(Locale.ROOT))) {`
`448`	`449`	`filtered.put(name, value);`
`449`	`450`	`}`
`450`	`451`	`});`
Original file line number	Diff line number	Diff line change
`@@ -17,6 +17,7 @@`
`17`	`17`	`package org.springframework.boot.actuate.endpoint.annotation;`
`18`	`18`
`19`	`19`	`import java.lang.reflect.Method;`
	`20`	`+import java.util.Locale;`
`20`	`21`
`21`	`22`	`import org.junit.jupiter.api.Test;`
`22`	`23`
`@@ -76,7 +77,7 @@ enum ExampleProducible implements Producible<ExampleProducible> {`
`76`	`77`
`77`	`78`	`@Override`
`78`	`79`	`public MimeType getProducedMimeType() {`
`79`		`- return new MimeType(toString().toLowerCase());`
	`80`	`+ return new MimeType(toString().toLowerCase(Locale.ROOT));`
`80`	`81`	`}`
`81`	`82`
`82`	`83`	`}`
Original file line number	Diff line number	Diff line change
`@@ -18,6 +18,7 @@`
`18`	`18`
`19`	`19`	`import java.util.ArrayList;`
`20`	`20`	`import java.util.List;`
	`21`	`+import java.util.Locale;`
`21`	`22`
`22`	`23`	`import org.springframework.boot.autoconfigure.security.oauth2.server.servlet.OAuth2AuthorizationServerProperties.Client;`
`23`	`24`	`import org.springframework.boot.autoconfigure.security.oauth2.server.servlet.OAuth2AuthorizationServerProperties.Registration;`
`@@ -123,7 +124,7 @@ private TokenSettings getTokenSettings(Client client, PropertyMapper map) {`
`123`	`124`	`}`
`124`	`125`
`125`	`126`	`private JwsAlgorithm jwsAlgorithm(String signingAlgorithm) {`
`126`		`- String name = signingAlgorithm.toUpperCase();`
	`127`	`+ String name = signingAlgorithm.toUpperCase(Locale.ROOT);`
`127`	`128`	`JwsAlgorithm jwsAlgorithm = SignatureAlgorithm.from(name);`
`128`	`129`	`if (jwsAlgorithm == null) {`
`129`	`130`	`jwsAlgorithm = MacAlgorithm.from(name);`
`@@ -132,7 +133,7 @@ private JwsAlgorithm jwsAlgorithm(String signingAlgorithm) {`
`132`	`133`	`}`
`133`	`134`
`134`	`135`	`private SignatureAlgorithm signatureAlgorithm(String signatureAlgorithm) {`
`135`		`- return SignatureAlgorithm.from(signatureAlgorithm.toUpperCase());`
	`136`	`+ return SignatureAlgorithm.from(signatureAlgorithm.toUpperCase(Locale.ROOT));`
`136`	`137`	`}`
`137`	`138`
`138`	`139`	`}`