src/share/classes/javax/imageio/ImageWriteParam.java

@@ -975,11 +975,11 @@
                 "Compression not supported");
         }
         if (compressionTypes == null) {
             return null;
         }
-        return (String[])compressionTypes.clone();
+        return compressionTypes.clone();
     }
 
     /**
      * Sets the compression type to one of the values indicated by
      * <code>getCompressionTypes</code>.  If a value of