--- a/src/java.rmi/share/classes/sun/rmi/server/ActivatableRef.java	Fri Dec 07 17:11:17 2018 +0100
+++ b/src/java.rmi/share/classes/sun/rmi/server/ActivatableRef.java	Fri Dec 07 11:51:17 2018 -0500
@@ -370,7 +370,7 @@
         ref = null;
         String className = in.readUTF();
 
-        if (className.equals("")) return;
+        if (className.isEmpty()) return;
 
         try {
             Class<?> refClass = Class.forName(RemoteRef.packagePrefix + "." +