diff --git a/spring-beans/src/main/java/org/springframework/beans/CachedIntrospectionResults.java b/spring-beans/src/main/java/org/springframework/beans/CachedIntrospectionResults.java
index f99f920b203..eb2cd89b9a3 100644
--- a/spring-beans/src/main/java/org/springframework/beans/CachedIntrospectionResults.java
+++ b/spring-beans/src/main/java/org/springframework/beans/CachedIntrospectionResults.java
@@ -76,7 +76,7 @@ public class CachedIntrospectionResults {
 	 * mode when calling the JavaBeans {@link Introspector}: "spring.beaninfo.ignore", with a
 	 * value of "true" skipping the search for {@code BeanInfo} classes (typically for scenarios
 	 * where no such classes are being defined for beans in the application in the first place).
-	 * <p>Default is "false", considering all {@code BeanInfo} metadata classes, like for
+	 * <p>The default is "false", considering all {@code BeanInfo} metadata classes, like for
 	 * standard {@link Introspector#getBeanInfo(Class)} calls. Consider switching this flag to
 	 * "true" if you experience repeated ClassLoader access for non-existing {@code BeanInfo}
 	 * classes, in case such access is expensive on startup or on lazy loading.
diff --git a/spring-core/src/main/java/org/springframework/core/env/ReadOnlySystemAttributesMap.java b/spring-core/src/main/java/org/springframework/core/env/ReadOnlySystemAttributesMap.java
index 5ded8cbbc5e..2f770277109 100644
--- a/spring-core/src/main/java/org/springframework/core/env/ReadOnlySystemAttributesMap.java
+++ b/spring-core/src/main/java/org/springframework/core/env/ReadOnlySystemAttributesMap.java
@@ -40,7 +40,7 @@ import org.springframework.util.Assert;
 abstract class ReadOnlySystemAttributesMap implements Map<String, String> {
 
 	public boolean containsKey(Object key) {
-		return get(key) != null;
+		return (get(key) != null);
 	}
 
 	/**
@@ -49,9 +49,7 @@ abstract class ReadOnlySystemAttributesMap implements Map<String, String> {
 	 */
 	public String get(Object key) {
 		Assert.isInstanceOf(String.class, key,
-			String.format("expected key [%s] to be of type String, got %s",
-					key, key.getClass().getName()));
-
+				String.format("Expected key [%s] to be of type String, got %s", key, key.getClass().getName()));
 		return this.getSystemAttribute((String) key);
 	}
 
@@ -61,11 +59,11 @@ abstract class ReadOnlySystemAttributesMap implements Map<String, String> {
 
 	/**
 	 * Template method that returns the underlying system attribute.
-	 *
 	 * <p>Implementations typically call {@link System#getProperty(String)} or {@link System#getenv(String)} here.
 	 */
 	protected abstract String getSystemAttribute(String attributeName);
 
+
 	// Unsupported
 
 	public int size() {
@@ -92,7 +90,7 @@ abstract class ReadOnlySystemAttributesMap implements Map<String, String> {
 		return Collections.emptySet();
 	}
 
-	public void putAll(Map<? extends String, ? extends String> m) {
+	public void putAll(Map<? extends String, ? extends String> map) {
 		throw new UnsupportedOperationException();
 	}
 
diff --git a/spring-core/src/main/java/org/springframework/util/ObjectUtils.java b/spring-core/src/main/java/org/springframework/util/ObjectUtils.java
index 14e3542c77b..5d6b9c5e5d6 100644
--- a/spring-core/src/main/java/org/springframework/util/ObjectUtils.java
+++ b/spring-core/src/main/java/org/springframework/util/ObjectUtils.java
@@ -59,10 +59,10 @@ public abstract class ObjectUtils {
 	}
 
 	/**
-	 * Check whether the given exception is compatible with the exceptions
-	 * declared in a throws clause.
-	 * @param ex the exception to checked
-	 * @param declaredExceptions the exceptions declared in the throws clause
+	 * Check whether the given exception is compatible with the specified
+	 * exception types, as declared in a throws clause.
+	 * @param ex the exception to check
+	 * @param declaredExceptions the exception types declared in the throws clause
 	 * @return whether the given exception is compatible
 	 */
 	public static boolean isCompatibleWithThrowsClause(Throwable ex, Class<?>... declaredExceptions) {
@@ -71,7 +71,7 @@ public abstract class ObjectUtils {
 		}
 		if (declaredExceptions != null) {
 			for (Class<?> declaredException : declaredExceptions) {
-				if (declaredException.isAssignableFrom(ex.getClass())) {
+				if (declaredException.isInstance(ex)) {
 					return true;
 				}
 			}