Apply Java modernization idioms across the codebase

eunseo9311 · eunseo9311 · commit 10d4148f3dec · 2026-02-23T14:03:44.000+09:00
Replace String.format() with String.formatted() and apply
instanceof pattern matching to align with the established
conventions already used throughout the project.

Signed-off-by: eunseo9311 &lt;eunseo9311@gmail.com&gt;
Signed-off-by: Eunseo Song &lt;162149585+eunseo9311@users.noreply.github.com&gt;
diff --git a/initializr-actuator/src/main/java/io/spring/initializr/actuate/stat/ProjectGenerationStatPublisher.java b/initializr-actuator/src/main/java/io/spring/initializr/actuate/stat/ProjectGenerationStatPublisher.java
@@ -88,7 +88,7 @@ public void handleEvent(ProjectRequestEvent event) {
 			});
 		}
 		catch (Exception ex) {
-			logger.warn(String.format("Failed to publish stat to index, document follows %n%n%s%n", json), ex);
+			logger.warn("Failed to publish stat to index, document follows %n%n%s%n".formatted(json), ex);
 		}
 	}
 
diff --git a/initializr-actuator/src/main/java/io/spring/initializr/actuate/stat/ProjectRequestDocument.java b/initializr-actuator/src/main/java/io/spring/initializr/actuate/stat/ProjectRequestDocument.java
@@ -211,8 +211,8 @@ public static class VersionInformation {
 
 		public VersionInformation(Version version) {
 			this.id = version.toString();
-			this.major = String.format("%s", version.getMajor());
-			this.minor = (version.getMinor() != null) ? String.format("%s.%s", version.getMajor(), version.getMinor())
+			this.major = "%s".formatted(version.getMajor());
+			this.minor = (version.getMinor() != null) ? "%s.%s".formatted(version.getMajor(), version.getMinor())
 					: null;
 		}
 
diff --git a/initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/scm/git/GitIgnore.java b/initializr-generator-spring/src/main/java/io/spring/initializr/generator/spring/scm/git/GitIgnore.java
@@ -139,7 +139,7 @@ public void write(PrintWriter writer) {
 			if (!this.items.isEmpty()) {
 				if (this.name != null) {
 					writer.println();
-					writer.println(String.format("### %s ###", this.name));
+					writer.println("### %s ###".formatted(this.name));
 				}
 				this.items.forEach(writer::println);
 			}
diff --git a/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/gradle/GradleKtsProjectGenerationConfigurationTests.java b/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/gradle/GradleKtsProjectGenerationConfigurationTests.java
@@ -104,7 +104,7 @@ void gradleWrapperIsContributedWhenGeneratingGradleKtsProject(String platformVer
 		assertThat(project).containsFiles("gradlew", "gradlew.bat", "gradle/wrapper/gradle-wrapper.properties",
 				"gradle/wrapper/gradle-wrapper.jar");
 		assertThat(project).textFile("gradle/wrapper/gradle-wrapper.properties")
-			.containsOnlyOnce(String.format("gradle-%s-bin.zip", expectedGradleVersion));
+			.containsOnlyOnce("gradle-%s-bin.zip".formatted(expectedGradleVersion));
 	}
 
 	@Test
diff --git a/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/gradle/GradleProjectGenerationConfigurationTests.java b/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/gradle/GradleProjectGenerationConfigurationTests.java
@@ -103,7 +103,7 @@ void gradleWrapperIsContributedWhenGeneratingGradleProject(String platformVersio
 		assertThat(project).containsFiles("gradlew", "gradlew.bat", "gradle/wrapper/gradle-wrapper.properties",
 				"gradle/wrapper/gradle-wrapper.jar");
 		assertThat(project).textFile("gradle/wrapper/gradle-wrapper.properties")
-			.containsOnlyOnce(String.format("gradle-%s-bin.zip", expectedGradleVersion));
+			.containsOnlyOnce("gradle-%s-bin.zip".formatted(expectedGradleVersion));
 	}
 
 	@Test
diff --git a/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/gradle/GradleWrapperContributorTests.java b/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/gradle/GradleWrapperContributorTests.java
@@ -54,7 +54,7 @@ void gradleWrapperSetExecutableFlagOnScripts(String gradleVersion) throws IOExce
 	private Consumer<Path> isNotExecutable() {
 		return (path) -> {
 			if (supportsExecutableFlag() && Files.isExecutable(path)) {
-				throw Failures.instance().failure(String.format("%nExpecting:%n  <%s>%nto not be executable.", path));
+				throw Failures.instance().failure("%nExpecting:%n  <%s>%nto not be executable.".formatted(path));
 			}
 		};
 	}
diff --git a/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/maven/MavenWrapperContributorTests.java b/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/build/maven/MavenWrapperContributorTests.java
@@ -52,7 +52,7 @@ void mavenWrapperSetExecutableFlagOnScripts(String mavenVersion) throws IOExcept
 	private Consumer<Path> isNotExecutable() {
 		return (path) -> {
 			if (supportsExecutableFlag() && Files.isExecutable(path)) {
-				throw Failures.instance().failure(String.format("%nExpecting:%n  <%s>%nto not be executable.", path));
+				throw Failures.instance().failure("%nExpecting:%n  <%s>%nto not be executable.".formatted(path));
 			}
 		};
 	}
diff --git a/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/code/CodeComplianceTests.java b/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/code/CodeComplianceTests.java
@@ -56,9 +56,9 @@ void currentGenerationJar(Language language) {
 		ProjectStructure project = generateProject(language, maven, "2.4.1");
 		assertThat(project).filePaths()
 			.contains(
-					String.format("src/main/%s/com/example/demo/DemoApplication.%s", language.id(),
+					"src/main/%s/com/example/demo/DemoApplication.%s".formatted(language.id(),
 							language.sourceFileExtension()),
-					String.format("src/test/%s/com/example/demo/DemoApplicationTests.%s", language.id(),
+					"src/test/%s/com/example/demo/DemoApplicationTests.%s".formatted(language.id(),
 							language.sourceFileExtension()));
 	}
 
@@ -69,9 +69,9 @@ void currentGenerationWar(Language language) {
 				(description) -> description.setPackaging(Packaging.forId("war")));
 		assertThat(project).filePaths()
 			.contains(
-					String.format("src/main/%s/com/example/demo/DemoApplication.%s", language.id(),
+					"src/main/%s/com/example/demo/DemoApplication.%s".formatted(language.id(),
 							language.sourceFileExtension()),
-					String.format("src/test/%s/com/example/demo/DemoApplicationTests.%s", language.id(),
+					"src/test/%s/com/example/demo/DemoApplicationTests.%s".formatted(language.id(),
 							language.sourceFileExtension()));
 	}
 
diff --git a/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/documentation/HelpDocumentProjectContributorTests.java b/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/documentation/HelpDocumentProjectContributorTests.java
@@ -89,7 +89,7 @@ void helpDocumentWithLinksToOtherLinks() throws IOException {
 	@Test
 	void helpDocumentWithSimpleSection() throws IOException {
 		HelpDocument document = new HelpDocument(this.templateRenderer);
-		document.addSection((writer) -> writer.println(String.format("# My test section%n%n    * Test")));
+		document.addSection((writer) -> writer.println("# My test section%n%n    * Test".formatted()));
 		assertHelpDocument(document).containsExactly("# My test section", "", "    * Test");
 	}
 
@@ -98,7 +98,7 @@ void helpDocumentWithLinksAndSimpleSection() throws IOException {
 		HelpDocument document = new HelpDocument(this.templateRenderer);
 		document.gettingStarted()
 			.addGuideLink("https://test.example.com", "test")
-			.addSection((writer) -> writer.println(String.format("# My test section%n%n    * Test")));
+			.addSection((writer) -> writer.println("# My test section%n%n    * Test".formatted()));
 		assertHelpDocument(document).containsExactly("# Getting Started", "", "### Guides",
 				"The following guides illustrate how to use some features concretely:", "",
 				"* [test](https://test.example.com)", "", "# My test section", "", "    * Test");
diff --git a/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/properties/ApplicationPropertiesComplianceTests.java b/initializr-generator-spring/src/test/java/io/spring/initializr/generator/spring/properties/ApplicationPropertiesComplianceTests.java
@@ -57,7 +57,7 @@ static Stream<Arguments> parameters() {
 	void applicationPropertiesGenerated(ConfigurationFileFormat format, String fileName) {
 		ProjectStructure project = generateProject(java, maven, "2.4.1",
 				(description) -> description.setConfigurationFileFormat(format));
-		assertThat(project).filePaths().contains(String.format("src/main/resources/%s", fileName));
+		assertThat(project).filePaths().contains("src/main/resources/%s".formatted(fileName));
 	}
 
 	@ParameterizedTest
@@ -69,7 +69,7 @@ void applicationPropertiesWithCustomProperties(ConfigurationFileFormat format, S
 						ApplicationPropertiesCustomizer.class,
 						() -> (properties) -> properties.add("spring.application.name", "app-name")));
 		String path = "project/properties/" + format + "/" + getAssertFileName(fileName);
-		assertThat(project).textFile(String.format("src/main/resources/%s", fileName))
+		assertThat(project).textFile("src/main/resources/%s".formatted(fileName))
 			.as("Resource " + path)
 			.hasSameContentAs(new ClassPathResource(path));
 	}
diff --git a/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/buildsystem/gradle/GradleBuildAssert.java b/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/buildsystem/gradle/GradleBuildAssert.java
@@ -67,7 +67,7 @@ public SELF hasToolchainForJava(String javaVersion) {
 	 * @return {@code this} assertion object
 	 */
 	public SELF hasProperty(String name, String value) {
-		return contains(String.format("%s = %s", name, quote(value)));
+		return contains("%s = %s".formatted(name, quote(value)));
 	}
 
 	/**
@@ -76,12 +76,12 @@ public SELF hasProperty(String name, String value) {
 	 * @return {@code this} assertion object
 	 */
 	public SELF containsOnlyExtProperties(String... values) {
-		StringBuilder builder = new StringBuilder(String.format("ext {%n"));
+		StringBuilder builder = new StringBuilder("ext {%n".formatted());
 		if (values.length % 2 == 1) {
 			throw new IllegalArgumentException("Size must be even, it is a set of property=value pairs");
 		}
 		for (int i = 0; i < values.length; i += 2) {
-			builder.append(String.format("\tset(%s, \"%s\")%n", quote(values[i]), values[i + 1]));
+			builder.append("\tset(%s, \"%s\")%n".formatted(quote(values[i]), values[i + 1]));
 		}
 		builder.append("}");
 		return contains(builder.toString());
diff --git a/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/buildsystem/gradle/GradleSettingsAssert.java b/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/buildsystem/gradle/GradleSettingsAssert.java
@@ -47,7 +47,7 @@ public SELF hasProjectName(String name) {
 	 * @return {@code this} assertion object
 	 */
 	public SELF hasProperty(String name, String value) {
-		return contains(String.format("%s = '%s", name, value));
+		return contains("%s = '%s".formatted(name, value));
 	}
 
 }
diff --git a/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/buildsystem/gradle/GroovyDslGradleBuildAssert.java b/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/buildsystem/gradle/GroovyDslGradleBuildAssert.java
@@ -47,7 +47,7 @@ protected String quote(String value) {
 	 * @return {@code this} assertion object
 	 */
 	public GroovyDslGradleBuildAssert hasPlugin(String id, String version) {
-		return contains(String.format("id %s version %s", quote(id), quote(version)));
+		return contains("id %s version %s".formatted(quote(id), quote(version)));
 	}
 
 	/**
@@ -56,7 +56,7 @@ public GroovyDslGradleBuildAssert hasPlugin(String id, String version) {
 	 * @return {@code this} assertion object
 	 */
 	public GroovyDslGradleBuildAssert hasPlugin(String id) {
-		return contains(String.format("id %s", quote(id)));
+		return contains("id %s".formatted(quote(id)));
 	}
 
 }
diff --git a/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/buildsystem/gradle/KotlinDslGradleBuildAssert.java b/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/buildsystem/gradle/KotlinDslGradleBuildAssert.java
@@ -48,7 +48,7 @@ protected String quote(String value) {
 	 * @return {@code this} assertion object
 	 */
 	public KotlinDslGradleBuildAssert hasPlugin(String id, String version) {
-		return contains(String.format("id(%s) version %s", quote(id), quote(version)));
+		return contains("id(%s) version %s".formatted(quote(id), quote(version)));
 	}
 
 	/**
@@ -57,7 +57,7 @@ public KotlinDslGradleBuildAssert hasPlugin(String id, String version) {
 	 * @return {@code this} assertion object
 	 */
 	public KotlinDslGradleBuildAssert hasPlugin(String id) {
-		return contains(String.format("id(%s)", quote(id)));
+		return contains("id(%s)".formatted(quote(id)));
 	}
 
 }
diff --git a/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/project/ProjectStructure.java b/initializr-generator-test/src/main/java/io/spring/initializr/generator/test/project/ProjectStructure.java
@@ -61,7 +61,7 @@ public ProjectStructure resolveModule(String name) {
 		Path projectDir = this.projectDirectory.resolve(name);
 		if (!Files.isDirectory(projectDir)) {
 			throw new IllegalArgumentException(
-					String.format("No directory '%s' found in '%s'", name, this.projectDirectory));
+					"No directory '%s' found in '%s'".formatted(name, this.projectDirectory));
 		}
 		return new ProjectStructure(projectDir);
 	}
diff --git a/initializr-generator-test/src/test/java/io/spring/initializr/generator/test/project/JvmModuleAssertTests.java b/initializr-generator-test/src/test/java/io/spring/initializr/generator/test/project/JvmModuleAssertTests.java
@@ -57,15 +57,15 @@ void hasMainSourceWithNonMatchingExtension(@TempDir Path root) throws IOExceptio
 		createFile(root, "src/main/java/com/example/Test.other");
 		assertThatExceptionOfType(AssertionError.class)
 			.isThrownBy(() -> assertThat(forJavaProject(root)).hasMainSource("com.example", "Test"))
-			.withMessageContaining(String.format("Source '%s' not found in package '%s'", "Test.java", "com.example"));
+			.withMessageContaining("Source '%s' not found in package '%s'".formatted("Test.java", "com.example"));
 	}
 
 	@Test
 	void hasMainSourceWithNonMatchingSourceDir(@TempDir Path root) throws IOException {
 		createFile(root, "src/main/groovy/com/example/Test.java");
 		assertThatExceptionOfType(AssertionError.class)
 			.isThrownBy(() -> assertThat(forJavaProject(root)).hasMainSource("com.example", "Test"))
-			.withMessageContaining(String.format("Source '%s' not found in package '%s'", "Test.java", "com.example"));
+			.withMessageContaining("Source '%s' not found in package '%s'".formatted("Test.java", "com.example"));
 	}
 
 	@Test
@@ -109,15 +109,15 @@ void hasTestSourceWithNonMatchingExtension(@TempDir Path root) throws IOExceptio
 		createFile(root, "src/test/java/com/example/Test.other");
 		assertThatExceptionOfType(AssertionError.class)
 			.isThrownBy(() -> assertThat(forJavaProject(root)).hasTestSource("com.example", "Test"))
-			.withMessageContaining(String.format("Source '%s' not found in package '%s'", "Test.java", "com.example"));
+			.withMessageContaining("Source '%s' not found in package '%s'".formatted("Test.java", "com.example"));
 	}
 
 	@Test
 	void hasTestSourceWithNonMatchingSourceDir(@TempDir Path root) throws IOException {
 		createFile(root, "src/test/groovy/com/example/Test.java");
 		assertThatExceptionOfType(AssertionError.class)
 			.isThrownBy(() -> assertThat(forJavaProject(root)).hasTestSource("com.example", "Test"))
-			.withMessageContaining(String.format("Source '%s' not found in package '%s'", "Test.java", "com.example"));
+			.withMessageContaining("Source '%s' not found in package '%s'".formatted("Test.java", "com.example"));
 	}
 
 	@Test
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GradleBuildWriter.java b/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GradleBuildWriter.java
@@ -267,7 +267,7 @@ protected final void writeTaskCustomization(IndentingWriter writer, GradleTask t
 
 	private String attributeAsString(Attribute attribute) {
 		String separator = (attribute.getType() == Attribute.Type.SET) ? "=" : "+=";
-		return String.format("%s %s %s", attribute.getName(), separator, attribute.getValue());
+		return "%s %s %s".formatted(attribute.getName(), separator, attribute.getValue());
 	}
 
 	protected abstract String invocationAsString(Invocation invocation);
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GradleSettingsWriter.java b/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GradleSettingsWriter.java
@@ -90,7 +90,7 @@ private void writePluginMapping(IndentingWriter writer, PluginMapping pluginMapp
 		writer.println("if (requested.id.id == " + wrapWithQuotes(pluginMapping.getId()) + ") {");
 		Dependency dependency = pluginMapping.getDependency();
 		Assert.state(dependency.getVersion() != null, "'dependency.getVersion()' must not be null");
-		String module = String.format("%s:%s:%s", dependency.getGroupId(), dependency.getArtifactId(),
+		String module = "%s:%s:%s".formatted(dependency.getGroupId(), dependency.getArtifactId(),
 				dependency.getVersion().getValue());
 		writer.indented(() -> writer.println("useModule(" + wrapWithQuotes(module) + ")"));
 		writer.println("}");
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleBuildWriter.java b/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleBuildWriter.java
@@ -102,7 +102,7 @@ protected void writeExtraProperties(IndentingWriter writer, Map<String, String>
 	}
 
 	private String getFormattedExtraProperty(String key, String value) {
-		return String.format("set('%s', %s)", key, value);
+		return "set('%s', %s)".formatted(key, value);
 	}
 
 	@Override
@@ -126,8 +126,8 @@ protected void writeConfigurations(IndentingWriter writer, GradleConfigurationCo
 	 */
 	protected void writeConfiguration(IndentingWriter writer, GradleConfiguration configuration) {
 		writer.println(configuration.getName() + " {");
-		writer.indented(() -> writer
-			.println(String.format("extendsFrom %s", String.join(", ", configuration.getExtendsFrom()))));
+		writer.indented(
+				() -> writer.println("extendsFrom %s".formatted(String.join(", ", configuration.getExtendsFrom()))));
 		writer.println("}");
 	}
 
@@ -207,7 +207,7 @@ protected String invocationAsString(Invocation invocation) {
 	@Override
 	protected void writeProperty(IndentingWriter writer, String name, @Nullable String value) {
 		if (value != null) {
-			writer.println(String.format("%s = '%s'", name, value));
+			writer.println("%s = '%s'".formatted(name, value));
 		}
 	}
 
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/KotlinDslGradleBuildWriter.java b/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/KotlinDslGradleBuildWriter.java
@@ -116,11 +116,10 @@ protected void writeConfiguration(IndentingWriter writer, GradleConfiguration co
 		}
 		else {
 			writer.println(configuration.getName() + " {");
-			writer.indented(() -> writer.println(String.format("extendsFrom(%s)",
-					configuration.getExtendsFrom()
-						.stream()
-						.map((name) -> configurationReference(name, customConfigurations))
-						.collect(Collectors.joining(", ")))));
+			writer.indented(() -> writer.println("extendsFrom(%s)".formatted(configuration.getExtendsFrom()
+				.stream()
+				.map((name) -> configurationReference(name, customConfigurations))
+				.collect(Collectors.joining(", ")))));
 			writer.println("}");
 		}
 	}
@@ -155,7 +154,7 @@ protected void writeExtraProperties(IndentingWriter writer, Map<String, String>
 	}
 
 	private String getFormattedExtraProperty(String key, String value) {
-		return String.format("extra[\"%s\"] = %s", key, value);
+		return "extra[\"%s\"] = %s".formatted(key, value);
 	}
 
 	@Override
@@ -200,7 +199,7 @@ protected String invocationAsString(Invocation invocation) {
 	@Override
 	protected void writeProperty(IndentingWriter writer, String name, @Nullable String value) {
 		if (value != null) {
-			writer.println(String.format("%s = \"%s\"", name, value));
+			writer.println("%s = \"%s\"".formatted(name, value));
 		}
 	}
 
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenBuildWriter.java b/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenBuildWriter.java
@@ -630,26 +630,26 @@ private void writeProfileBuild(IndentingWriter writer, MavenProfile profile) {
 
 	private void writeSingleElement(IndentingWriter writer, String name, @Nullable Object value) {
 		if (value != null) {
-			CharSequence text = (value instanceof CharSequence) ? (CharSequence) value : value.toString();
+			CharSequence text = (value instanceof CharSequence cs) ? cs : value.toString();
 			if (!StringUtils.hasLength(text)) {
-				writer.println(String.format("<%s/>", name));
+				writer.println("<%s/>".formatted(name));
 			}
 			else {
-				writer.print(String.format("<%s>", name));
+				writer.print("<%s>".formatted(name));
 				writer.print(encodeText(text));
-				writer.println(String.format("</%s>", name));
+				writer.println("</%s>".formatted(name));
 			}
 		}
 	}
 
 	private void writeProcessingInstruction(IndentingWriter writer, String content) {
-		writer.println(String.format("<?%s?>", content));
+		writer.println("<?%s?>".formatted(content));
 	}
 
 	private void writeElement(IndentingWriter writer, String name, Runnable withContent) {
-		writer.println(String.format("<%s>", name));
+		writer.println("<%s>".formatted(name));
 		writer.indented(withContent);
-		writer.println(String.format("</%s>", name));
+		writer.println("</%s>".formatted(name));
 	}
 
 	private <T> void writeCollectionElement(IndentingWriter writer, String name, Stream<T> items,
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenExtensionContainer.java b/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenExtensionContainer.java
@@ -101,7 +101,7 @@ public boolean remove(String groupId, String artifactId) {
 	}
 
 	private String extensionKey(String groupId, String artifactId) {
-		return String.format("%s:%s", groupId, artifactId);
+		return "%s:%s".formatted(groupId, artifactId);
 	}
 
 }
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenPlugin.java b/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenPlugin.java
@@ -414,8 +414,9 @@ public ConfigurationBuilder configure(String name, Consumer<ConfigurationBuilder
 				})
 				.getValue();
 			if (!(value instanceof ConfigurationBuilder nestedConfiguration)) {
-				throw new IllegalArgumentException(String.format(
-						"Could not customize parameter '%s', a single value %s is already registered", name, value));
+				throw new IllegalArgumentException(
+						"Could not customize parameter '%s', a single value %s is already registered".formatted(name,
+								value));
 			}
 			consumer.accept(nestedConfiguration);
 			return this;
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenPluginContainer.java b/initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/maven/MavenPluginContainer.java
@@ -99,7 +99,7 @@ public boolean remove(String groupId, String artifactId) {
 	}
 
 	private String pluginKey(String groupId, String artifactId) {
-		return String.format("%s:%s", groupId, artifactId);
+		return "%s:%s".formatted(groupId, artifactId);
 	}
 
 }
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/io/template/MustacheTemplateRenderer.java b/initializr-generator/src/main/java/io/spring/initializr/generator/io/template/MustacheTemplateRenderer.java
@@ -58,7 +58,7 @@ public class MustacheTemplateRenderer implements TemplateRenderer {
 	public MustacheTemplateRenderer(String resourcePrefix, @Nullable Cache templateCache) {
 		String prefix = (resourcePrefix.endsWith("/") ? resourcePrefix : resourcePrefix + "/");
 		this.mustache = Mustache.compiler().withLoader(mustacheTemplateLoader(prefix)).escapeHTML(false);
-		this.keyGenerator = (name) -> String.format("%s%s", prefix, name);
+		this.keyGenerator = (name) -> "%s%s".formatted(prefix, name);
 		this.templateCache = templateCache;
 	}
 
diff --git a/initializr-generator/src/main/java/io/spring/initializr/generator/language/CodeBlock.java b/initializr-generator/src/main/java/io/spring/initializr/generator/language/CodeBlock.java
diff --git a/initializr-generator/src/test/java/io/spring/initializr/generator/io/text/MustacheSectionTests.java b/initializr-generator/src/test/java/io/spring/initializr/generator/io/text/MustacheSectionTests.java
diff --git a/initializr-web/src/main/java/io/spring/initializr/web/controller/ProjectGenerationController.java b/initializr-web/src/main/java/io/spring/initializr/web/controller/ProjectGenerationController.java
diff --git a/initializr-web/src/main/java/io/spring/initializr/web/mapper/InitializrMetadataV2JsonMapper.java b/initializr-web/src/main/java/io/spring/initializr/web/mapper/InitializrMetadataV2JsonMapper.java
diff --git a/initializr-web/src/test/java/io/spring/initializr/web/AbstractInitializrIntegrationTests.java b/initializr-web/src/test/java/io/spring/initializr/web/AbstractInitializrIntegrationTests.java
diff --git a/initializr-web/src/test/java/io/spring/initializr/web/test/JsonFieldProcessor.java b/initializr-web/src/test/java/io/spring/initializr/web/test/JsonFieldProcessor.java

Original file line number	Diff line number	Diff line change
`@@ -88,7 +88,7 @@ public void handleEvent(ProjectRequestEvent event) {`
`88`	`88`	`});`
`89`	`89`	`}`
`90`	`90`	`catch (Exception ex) {`
`91`		`- logger.warn(String.format("Failed to publish stat to index, document follows %n%n%s%n", json), ex);`
	`91`	`+ logger.warn("Failed to publish stat to index, document follows %n%n%s%n".formatted(json), ex);`
`92`	`92`	`}`
`93`	`93`	`}`
`94`	`94`
Original file line number	Diff line number	Diff line change
`@@ -211,8 +211,8 @@ public static class VersionInformation {`
`211`	`211`
`212`	`212`	`public VersionInformation(Version version) {`
`213`	`213`	`this.id = version.toString();`
`214`		`- this.major = String.format("%s", version.getMajor());`
`215`		`- this.minor = (version.getMinor() != null) ? String.format("%s.%s", version.getMajor(), version.getMinor())`
	`214`	`+ this.major = "%s".formatted(version.getMajor());`
	`215`	`+ this.minor = (version.getMinor() != null) ? "%s.%s".formatted(version.getMajor(), version.getMinor())`
`216`	`216`	`: null;`
`217`	`217`	`}`
`218`	`218`
Original file line number	Diff line number	Diff line change
`@@ -139,7 +139,7 @@ public void write(PrintWriter writer) {`
`139`	`139`	`if (!this.items.isEmpty()) {`
`140`	`140`	`if (this.name != null) {`
`141`	`141`	`writer.println();`
`142`		`- writer.println(String.format("### %s ###", this.name));`
	`142`	`+ writer.println("### %s ###".formatted(this.name));`
`143`	`143`	`}`
`144`	`144`	`this.items.forEach(writer::println);`
`145`	`145`	`}`
Original file line number	Diff line number	Diff line change
`@@ -104,7 +104,7 @@ void gradleWrapperIsContributedWhenGeneratingGradleKtsProject(String platformVer`
`104`	`104`	`assertThat(project).containsFiles("gradlew", "gradlew.bat", "gradle/wrapper/gradle-wrapper.properties",`
`105`	`105`	`"gradle/wrapper/gradle-wrapper.jar");`
`106`	`106`	`assertThat(project).textFile("gradle/wrapper/gradle-wrapper.properties")`
`107`		`- .containsOnlyOnce(String.format("gradle-%s-bin.zip", expectedGradleVersion));`
	`107`	`+ .containsOnlyOnce("gradle-%s-bin.zip".formatted(expectedGradleVersion));`
`108`	`108`	`}`
`109`	`109`
`110`	`110`	`@Test`
Original file line number	Diff line number	Diff line change
`@@ -103,7 +103,7 @@ void gradleWrapperIsContributedWhenGeneratingGradleProject(String platformVersio`
`103`	`103`	`assertThat(project).containsFiles("gradlew", "gradlew.bat", "gradle/wrapper/gradle-wrapper.properties",`
`104`	`104`	`"gradle/wrapper/gradle-wrapper.jar");`
`105`	`105`	`assertThat(project).textFile("gradle/wrapper/gradle-wrapper.properties")`
`106`		`- .containsOnlyOnce(String.format("gradle-%s-bin.zip", expectedGradleVersion));`
	`106`	`+ .containsOnlyOnce("gradle-%s-bin.zip".formatted(expectedGradleVersion));`
`107`	`107`	`}`
`108`	`108`
`109`	`109`	`@Test`
Original file line number	Diff line number	Diff line change
`@@ -54,7 +54,7 @@ void gradleWrapperSetExecutableFlagOnScripts(String gradleVersion) throws IOExce`
`54`	`54`	`private Consumer<Path> isNotExecutable() {`
`55`	`55`	`return (path) -> {`
`56`	`56`	`if (supportsExecutableFlag() && Files.isExecutable(path)) {`
`57`		`- throw Failures.instance().failure(String.format("%nExpecting:%n <%s>%nto not be executable.", path));`
	`57`	`+ throw Failures.instance().failure("%nExpecting:%n <%s>%nto not be executable.".formatted(path));`
`58`	`58`	`}`
`59`	`59`	`};`
`60`	`60`	`}`
Original file line number	Diff line number	Diff line change
`@@ -52,7 +52,7 @@ void mavenWrapperSetExecutableFlagOnScripts(String mavenVersion) throws IOExcept`
`52`	`52`	`private Consumer<Path> isNotExecutable() {`
`53`	`53`	`return (path) -> {`
`54`	`54`	`if (supportsExecutableFlag() && Files.isExecutable(path)) {`
`55`		`- throw Failures.instance().failure(String.format("%nExpecting:%n <%s>%nto not be executable.", path));`
	`55`	`+ throw Failures.instance().failure("%nExpecting:%n <%s>%nto not be executable.".formatted(path));`
`56`	`56`	`}`
`57`	`57`	`};`
`58`	`58`	`}`