diff --git a/spring-beans/src/main/java/org/springframework/beans/annotation/AnnotationBeanUtils.java b/spring-beans/src/main/java/org/springframework/beans/annotation/AnnotationBeanUtils.java
index 3befe100726..03a03c1f01f 100644
--- a/spring-beans/src/main/java/org/springframework/beans/annotation/AnnotationBeanUtils.java
+++ b/spring-beans/src/main/java/org/springframework/beans/annotation/AnnotationBeanUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -19,6 +19,7 @@ package org.springframework.beans.annotation;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -58,8 +59,11 @@ public abstract class AnnotationBeanUtils {
 	 * @param excludedProperties the names of excluded properties, if any
 	 * @see org.springframework.beans.BeanWrapper
 	 */
-	public static void copyPropertiesToBean(Annotation ann, Object bean, StringValueResolver valueResolver, String... excludedProperties) {
-		Set<String> excluded = new HashSet<String>(Arrays.asList(excludedProperties));
+	public static void copyPropertiesToBean(Annotation ann, Object bean, StringValueResolver valueResolver,
+			String... excludedProperties) {
+
+		Set<String> excluded = (excludedProperties.length == 0 ? Collections.<String>emptySet() :
+				new HashSet<String>(Arrays.asList(excludedProperties)));
 		Method[] annotationProperties = ann.annotationType().getDeclaredMethods();
 		BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(bean);
 		for (Method annotationProperty : annotationProperties) {
diff --git a/spring-beans/src/main/java/org/springframework/beans/factory/support/AutowireUtils.java b/spring-beans/src/main/java/org/springframework/beans/factory/support/AutowireUtils.java
index 4d9d0dabf36..31da00686f2 100644
--- a/spring-beans/src/main/java/org/springframework/beans/factory/support/AutowireUtils.java
+++ b/spring-beans/src/main/java/org/springframework/beans/factory/support/AutowireUtils.java
@@ -278,7 +278,7 @@ abstract class AutowireUtils {
 
 
 	/**
-	 * Reflective InvocationHandler for lazy access to the current target object.
+	 * Reflective {@link InvocationHandler} for lazy access to the current target object.
 	 */
 	@SuppressWarnings("serial")
 	private static class ObjectFactoryDelegatingInvocationHandler implements InvocationHandler, Serializable {
diff --git a/spring-beans/src/test/java/org/springframework/beans/factory/support/AutowireUtilsTests.java b/spring-beans/src/test/java/org/springframework/beans/factory/support/AutowireUtilsTests.java
index 1dc7338142b..48cf786160a 100644
--- a/spring-beans/src/test/java/org/springframework/beans/factory/support/AutowireUtilsTests.java
+++ b/spring-beans/src/test/java/org/springframework/beans/factory/support/AutowireUtilsTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -27,6 +27,8 @@ import org.springframework.util.ReflectionUtils;
 import static org.junit.Assert.*;
 
 /**
+ * Unit tests for {@link AutowireUtils}.
+ *
  * @author Juergen Hoeller
  * @author Sam Brannen
  */
@@ -36,7 +38,7 @@ public class AutowireUtilsTests {
 	public void genericMethodReturnTypes() {
 		Method notParameterized = ReflectionUtils.findMethod(MyTypeWithMethods.class, "notParameterized");
 		assertEquals(String.class,
-				AutowireUtils.resolveReturnTypeForFactoryMethod(notParameterized, new Object[]{}, getClass().getClassLoader()));
+				AutowireUtils.resolveReturnTypeForFactoryMethod(notParameterized, new Object[0], getClass().getClassLoader()));
 
 		Method notParameterizedWithArguments = ReflectionUtils.findMethod(MyTypeWithMethods.class, "notParameterizedWithArguments", Integer.class, Boolean.class);
 		assertEquals(String.class,
diff --git a/spring-core/src/main/java/org/springframework/core/annotation/AnnotationUtils.java b/spring-core/src/main/java/org/springframework/core/annotation/AnnotationUtils.java
index de9dfd9fb2c..fccfc00effe 100644
--- a/spring-core/src/main/java/org/springframework/core/annotation/AnnotationUtils.java
+++ b/spring-core/src/main/java/org/springframework/core/annotation/AnnotationUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -51,14 +51,14 @@ import org.springframework.util.StringUtils;
  * <p>Note that most of the features of this class are not provided by the
  * JDK's introspection facilities themselves.
  *
- * <p>As a general rule for runtime-retained annotations (e.g. for transaction
- * control, authorization, or service exposure), always use the lookup methods
- * on this class (e.g., {@link #findAnnotation(Method, Class)},
- * {@link #getAnnotation(Method, Class)}, and {@link #getAnnotations(Method)})
- * instead of the plain annotation lookup methods in the JDK. You can still
- * explicitly choose between a <em>get</em> lookup on the given class level only
- * ({@link #getAnnotation(Method, Class)}) and a <em>find</em> lookup in the entire
- * inheritance hierarchy of the given method ({@link #findAnnotation(Method, Class)}).
+ * <p>As a general rule for runtime-retained application annotations (e.g. for
+ * transaction control, authorization, or service exposure), always use the
+ * lookup methods on this class (e.g. {@link #findAnnotation(Method, Class)} or
+ * {@link #getAnnotation(Method, Class)}) instead of the plain annotation lookup
+ * methods in the JDK. You can still explicitly choose between a <em>get</em>
+ * lookup on the given class level only ({@link #getAnnotation(Method, Class)})
+ * and a <em>find</em> lookup in the entire inheritance hierarchy of the given
+ * method ({@link #findAnnotation(Method, Class)}).
  *
  * <h3>Terminology</h3>
  * The terms <em>directly present</em>, <em>indirectly present</em>, and
@@ -542,7 +542,7 @@ public abstract class AnnotationUtils {
 
 	/**
 	 * Find a single {@link Annotation} of {@code annotationType} on the supplied
-	 * {@link Method}, traversing its super methods (i.e., from superclasses and
+	 * {@link Method}, traversing its super methods (i.e. from superclasses and
 	 * interfaces) if the annotation is not <em>directly present</em> on the given
 	 * method itself.
 	 * <p>Correctly handles bridge {@link Method Methods} generated by the compiler.
diff --git a/spring-web/src/main/java/org/springframework/web/util/HtmlCharacterEntityDecoder.java b/spring-web/src/main/java/org/springframework/web/util/HtmlCharacterEntityDecoder.java
index 465c3e5f4bb..2277edfff3a 100644
--- a/spring-web/src/main/java/org/springframework/web/util/HtmlCharacterEntityDecoder.java
+++ b/spring-web/src/main/java/org/springframework/web/util/HtmlCharacterEntityDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -66,8 +66,9 @@ class HtmlCharacterEntityDecoder {
 					this.originalMessage.indexOf('&', this.nextPotentialReferencePosition);
 
 			if (this.nextSemicolonPosition != -1 &&
-					this.nextSemicolonPosition < this.nextPotentialReferencePosition)
+					this.nextSemicolonPosition < this.nextPotentialReferencePosition) {
 				this.nextSemicolonPosition = this.originalMessage.indexOf(';', this.nextPotentialReferencePosition + 1);
+			}
 
 			boolean isPotentialReference = (this.nextPotentialReferencePosition != -1 &&
 					this.nextSemicolonPosition != -1 &&
@@ -94,12 +95,13 @@ class HtmlCharacterEntityDecoder {
 			int skipUntilIndex = (this.nextPotentialReferencePosition != -1 ?
 					this.nextPotentialReferencePosition : this.originalMessage.length());
 			if (skipUntilIndex - this.currentPosition > 3) {
-				this.decodedMessage.append(this.originalMessage.substring(this.currentPosition, skipUntilIndex));
+				this.decodedMessage.append(this.originalMessage, this.currentPosition, skipUntilIndex);
 				this.currentPosition = skipUntilIndex;
 			}
 			else {
-				while (this.currentPosition < skipUntilIndex)
+				while (this.currentPosition < skipUntilIndex) {
 					this.decodedMessage.append(this.originalMessage.charAt(this.currentPosition++));
+				}
 			}
 		}
 	}
diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ResponseEntityExceptionHandler.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ResponseEntityExceptionHandler.java
index d4303fb8811..baf17afa159 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ResponseEntityExceptionHandler.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ResponseEntityExceptionHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -442,7 +442,7 @@ public abstract class ResponseEntityExceptionHandler {
 	}
 
 	/**
-	 * Customize the response for NoHandlerFoundException.
+	 * Customize the response for AsyncRequestTimeoutException.
 	 * <p>This method delegates to {@link #handleExceptionInternal}.
 	 * @param ex the exception
 	 * @param headers the headers to be written to the response
@@ -470,7 +470,7 @@ public abstract class ResponseEntityExceptionHandler {
 	}
 
 	/**
-	 * A single place to customize the response body of all Exception types.
+	 * A single place to customize the response body of all exception types.
 	 * <p>The default implementation sets the {@link WebUtils#ERROR_EXCEPTION_ATTRIBUTE}
 	 * request attribute and creates a {@link ResponseEntity} from the given
 	 * body, headers, and status.