fixup

src/main/java/com/oltpbenchmark/util/StringUtil.java

@@ -80,14 +80,6 @@ public static String formatMaps(Map<?, ?>... maps) {
         return (formatMaps(":", false, false, false, false, true, true, maps));
     }
 
-    /**
-     * Simple generic class overload to avoid some cast warnings below.
-     */
-    public static class Obj2StrArrMap extends HashMap<Object, String[]> {
-        // Required serialization field.
-        static final long serialVersionUID = 0;
-    }
-
     /**
      * Return key/value maps into a nicely formatted table
      * The maps are displayed in order from first to last, and there will be a
@@ -117,8 +109,8 @@ public static String formatMaps(String delimiter, boolean upper, boolean box, bo
         // Figure out the largest key size so we can get spacing right
         int max_key_size = 0;
         int max_title_size = 0;
-
-        final Map<Object, String[]>[] map_keys = new Obj2StrArrMap[maps.length];
+        @SuppressWarnings({"unchecked", "rawtypes"})
+        final Map<Object, String[]>[] map_keys = (Map<Object, String[]>[]) new Map[maps.length];
         final boolean[] map_titles = new boolean[maps.length];
         for (int i = 0; i < maps.length; i++) {
             Map<?, ?> m = maps[i];