Polish NativeImageRequirementsNotMetException

Closes gh-48307

core/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java

@@ -420,7 +420,7 @@ public class SpringApplication {
 
 	private void addAotGeneratedInitializerIfNecessary(List<ApplicationContextInitializer<?>> initializers) {
 		if (NativeDetector.inNativeImage()) {
-			checkNativeImageVersion();
+			NativeImageRequirementsException.throwIfNotMet();
 		}
 		if (AotDetector.useGeneratedArtifacts()) {
 			List<ApplicationContextInitializer<?>> aotInitializers = new ArrayList<>(
@@ -438,15 +438,6 @@ public class SpringApplication {
 		}
 	}
 
-	private void checkNativeImageVersion() {
-		JavaVersion minRequiredJavaVersion = JavaVersion.TWENTY_FIVE;
-		if (JavaVersion.getJavaVersion().isOlderThan(minRequiredJavaVersion)) {
-			throw new NativeImageRequirementsNotMetException(
-					"Native Image requirements not met, please upgrade it. Native Image must support at least Java %s"
-						.formatted(minRequiredJavaVersion));
-		}
-	}
-
 	private void refreshContext(ConfigurableApplicationContext context) {
 		if (this.properties.isRegisterShutdownHook()) {
 			shutdownHook.registerApplicationContext(context);
@@ -1661,16 +1652,24 @@ public class SpringApplication {
 	/**
 	 * Exception which is thrown if GraalVM's native-image requirements aren't met.
 	 */
-	static final class NativeImageRequirementsNotMetException extends RuntimeException {
+	static final class NativeImageRequirementsException extends RuntimeException {
 
-		/**
-		 * Creates a new {@link NativeImageRequirementsNotMetException} instance.
-		 * @param message the message
-		 */
-		NativeImageRequirementsNotMetException(String message) {
+		private static final JavaVersion MINIMUM_REQUIRED_JAVA_VERSION = JavaVersion.TWENTY_FIVE;
+
+		private static final JavaVersion CURRENT_JAVA_VERSION = JavaVersion.getJavaVersion();
+
+		NativeImageRequirementsException(String message) {
 			super(message);
 		}
 
+		static void throwIfNotMet() {
+			if (CURRENT_JAVA_VERSION.isOlderThan(MINIMUM_REQUIRED_JAVA_VERSION)) {
+				throw new NativeImageRequirementsException("Native Image requirements not met. "
+						+ "Native Image must support at least Java %s but Java %s was detected"
+							.formatted(MINIMUM_REQUIRED_JAVA_VERSION, CURRENT_JAVA_VERSION));
+			}
+		}
+
 	}
 
 	/**

core/spring-boot/src/test/java/org/springframework/boot/SpringApplicationTests.java

@@ -59,7 +59,7 @@ import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.beans.factory.support.BeanNameGenerator;
 import org.springframework.beans.factory.support.DefaultBeanNameGenerator;
 import org.springframework.boot.Banner.Mode;
-import org.springframework.boot.SpringApplication.NativeImageRequirementsNotMetException;
+import org.springframework.boot.SpringApplication.NativeImageRequirementsException;
 import org.springframework.boot.availability.AvailabilityChangeEvent;
 import org.springframework.boot.availability.AvailabilityState;
 import org.springframework.boot.availability.LivenessState;
@@ -77,6 +77,7 @@ import org.springframework.boot.context.event.ApplicationStartingEvent;
 import org.springframework.boot.context.event.SpringApplicationEvent;
 import org.springframework.boot.convert.ApplicationConversionService;
 import org.springframework.boot.env.DefaultPropertiesPropertySource;
+import org.springframework.boot.system.JavaVersion;
 import org.springframework.boot.testsupport.classpath.ForkedClassPath;
 import org.springframework.boot.testsupport.classpath.resources.WithResource;
 import org.springframework.boot.testsupport.system.CapturedOutput;
@@ -753,9 +754,10 @@ class SpringApplicationTests {
 		try {
 			SpringApplication application = new SpringApplication();
 			application.setWebApplicationType(WebApplicationType.NONE);
-			assertThatExceptionOfType(NativeImageRequirementsNotMetException.class).isThrownBy(application::run)
-				.withMessage(
-						"Native Image requirements not met, please upgrade it. Native Image must support at least Java 25");
+			assertThatExceptionOfType(NativeImageRequirementsException.class).isThrownBy(application::run)
+				.withMessage("Native Image requirements not met. "
+						+ "Native Image must support at least Java 25 but Java %s was detected"
+							.formatted(JavaVersion.getJavaVersion()));
 		}
 		finally {
 			System.clearProperty("org.graalvm.nativeimage.imagecode");