Index: D:/eclipseworkspaces/main/commons-lang/src/java/org/apache/commons/lang/time/FastDateFormat.java
===================================================================
--- D:/eclipseworkspaces/main/commons-lang/src/java/org/apache/commons/lang/time/FastDateFormat.java	(revision 589646)
+++ D:/eclipseworkspaces/main/commons-lang/src/java/org/apache/commons/lang/time/FastDateFormat.java	(working copy)
@@ -107,11 +107,11 @@
     
     private static String cDefaultPattern;
 
-    private static Map cInstanceCache = new HashMap(7);
-    private static Map cDateInstanceCache = new HashMap(7);
-    private static Map cTimeInstanceCache = new HashMap(7);
-    private static Map cDateTimeInstanceCache = new HashMap(7);
-    private static Map cTimeZoneDisplayCache = new HashMap(7);
+    private static final Map cInstanceCache = new HashMap(7);
+    private static final Map cDateInstanceCache = new HashMap(7);
+    private static final Map cTimeInstanceCache = new HashMap(7);
+    private static final Map cDateTimeInstanceCache = new HashMap(7);
+    private static final Map cTimeZoneDisplayCache = new HashMap(7);
 
     /**
      * The pattern.