Order modifiers to align with JLS

This commit also applies Checkstyle ModifierOrder to enforce it.

See gh-31368

spring-context/src/main/java/org/springframework/context/support/DefaultLifecycleProcessor.java

@@ -88,7 +88,7 @@ public class DefaultLifecycleProcessor implements LifecycleProcessor, BeanFactor
 	public static final String CHECKPOINT_ON_REFRESH_VALUE = "onRefresh";
 
 
-	private final static boolean checkpointOnRefresh =
+	private static final boolean checkpointOnRefresh =
 			CHECKPOINT_ON_REFRESH_VALUE.equalsIgnoreCase(SpringProperties.getProperty(CHECKPOINT_PROPERTY_NAME));
 
 	private final Log logger = LogFactory.getLog(getClass());

spring-context/src/main/java/org/springframework/validation/beanvalidation/MethodValidationAdapter.java

@@ -519,7 +519,7 @@ public class MethodValidationAdapter implements MethodValidator {
 	 * also falling back on container indexes if necessary for cascaded
 	 * constraints on a List container.
 	 */
-	private final static class ResultComparator implements Comparator<ParameterValidationResult> {
+	private static final class ResultComparator implements Comparator<ParameterValidationResult> {
 
 		@Override
 		public int compare(ParameterValidationResult result1, ParameterValidationResult result2) {

spring-context/src/main/java/org/springframework/validation/beanvalidation/MethodValidationInterceptor.java

@@ -234,7 +234,7 @@ public class MethodValidationInterceptor implements MethodInterceptor {
 	/**
 	 * Helper class to decorate reactive arguments with async validation.
 	 */
-	private final static class ReactorValidationHelper {
+	private static final class ReactorValidationHelper {
 
 		private static final ReactiveAdapterRegistry reactiveAdapterRegistry =
 				ReactiveAdapterRegistry.getSharedInstance();