src/java.xml/share/classes/com/sun/org/apache/xml/internal/serialize/BaseMarkupSerializer.java

@@ -1,8 +1,8 @@
 /*
  * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
- * @LastModified: Oct 2017
+ * @LastModified: Nov 2017
  */
 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.

@@ -1900,11 +1900,11 @@
         if ( _elementStateCount == 0 ) {
             return null;
         }
         for ( int i = _elementStateCount ; i > 0 ; --i ) {
             if ( _elementStates[ i ].prefixes != null ) {
-                prefix = (String) _elementStates[ i ].prefixes.get( namespaceURI );
+                prefix = _elementStates[ i ].prefixes.get( namespaceURI );
                 if ( prefix != null )
                     return prefix;
             }
         }
         return null;