Polishing

spring-core/src/main/java/org/springframework/util/ClassUtils.java

@@ -776,9 +776,9 @@ public abstract class ClassUtils {
 	 * conflicting method signatures (or a similar constraint is violated)
 	 * @see java.lang.reflect.Proxy#getProxyClass
 	 */
-	@SuppressWarnings("deprecation")
+	@SuppressWarnings("deprecation")  // on JDK 9
 	public static Class<?> createCompositeInterface(Class<?>[] interfaces, @Nullable ClassLoader classLoader) {
-		Assert.notEmpty(interfaces, "Interfaces must not be empty");
+		Assert.notEmpty(interfaces, "Interface array must not be empty");
 		return Proxy.getProxyClass(classLoader, interfaces);
 	}