Merge pull request #47339 from fhiyo

* pr/47339:
  Polish "Use non-deprecated syntax to configure sourceCompatibility"
  Use non-deprecated syntax to configure sourceCompatibility

Closes gh-47339

Author: snicoll

buildSrc/src/test/java/org/springframework/boot/build/ConventionsPluginTests.java

@@ -76,7 +76,9 @@ void jarIncludesLegalFiles() throws IOException {
 			out.println("    id 'org.springframework.boot.conventions'");
 			out.println("}");
 			out.println("version = '1.2.3'");
-			out.println("sourceCompatibility = '17'");
+			out.println("java {");
+			out.println("    sourceCompatibility = '17'");
+			out.println("}");
 			out.println("description 'Test project for manifest customization'");
 			out.println("jar.archiveFileName = 'test.jar'");
 		}
@@ -106,7 +108,9 @@ void sourceJarIsBuilt() throws IOException {
 			out.println("    id 'org.springframework.boot.conventions'");
 			out.println("}");
 			out.println("version = '1.2.3'");
-			out.println("sourceCompatibility = '17'");
+			out.println("java {");
+			out.println("    sourceCompatibility = '17'");
+			out.println("}");
 			out.println("description 'Test'");
 		}
 		runGradle("assemble");
@@ -135,7 +139,9 @@ void javadocJarIsBuilt() throws IOException {
 			out.println("    id 'org.springframework.boot.conventions'");
 			out.println("}");
 			out.println("version = '1.2.3'");
-			out.println("sourceCompatibility = '17'");
+			out.println("java {");
+			out.println("    sourceCompatibility = '17'");
+			out.println("}");
 			out.println("description 'Test'");
 		}
 		runGradle("assemble");

spring-boot-project/spring-boot-docs/src/docs/antora/modules/tutorial/pages/first-application/index.adoc

@@ -180,7 +180,10 @@ apply plugin: 'io.spring.dependency-management'
 
 group = 'com.example'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '17'
+
+java {
+	sourceCompatibility = '17'
+}
 
 repositories {
 	mavenCentral()