Apply "instanceof pattern matching" in spring-jcl module

See gh-30067

spring-jcl/src/main/java/org/apache/commons/logging/LogAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -119,8 +119,8 @@ final class LogAdapter {
 
 		public static Log createLocationAwareLog(String name) {
 			Logger logger = LoggerFactory.getLogger(name);
-			return (logger instanceof LocationAwareLogger ?
-					new Slf4jLocationAwareLog((LocationAwareLogger) logger) : new Slf4jLog<>(logger));
+			return (logger instanceof LocationAwareLogger locationAwareLogger ?
+					new Slf4jLocationAwareLog(locationAwareLogger) : new Slf4jLog<>(logger));
 		}
 
 		public static Log createLog(String name) {
@@ -247,14 +247,14 @@ final class LogAdapter {
 		}
 
 		private void log(Level level, Object message, Throwable exception) {
-			if (message instanceof String) {
+			if (message instanceof String text) {
 				// Explicitly pass a String argument, avoiding Log4j's argument expansion
 				// for message objects in case of "{}" sequences (SPR-16226)
 				if (exception != null) {
-					this.logger.logIfEnabled(FQCN, level, null, (String) message, exception);
+					this.logger.logIfEnabled(FQCN, level, null, text, exception);
 				}
 				else {
-					this.logger.logIfEnabled(FQCN, level, null, (String) message);
+					this.logger.logIfEnabled(FQCN, level, null, text);
 				}
 			}
 			else {
@@ -593,8 +593,8 @@ final class LogAdapter {
 		private void log(java.util.logging.Level level, Object message, Throwable exception) {
 			if (this.logger.isLoggable(level)) {
 				LogRecord rec;
-				if (message instanceof LogRecord) {
-					rec = (LogRecord) message;
+				if (message instanceof LogRecord logRecord) {
+					rec = logRecord;
 				}
 				else {
 					rec = new LocationResolvingLogRecord(level, String.valueOf(message));