This causes strange behavior I a have an object kuku that holds an JDK5.0 Enum when I use HashMap to hold kuku objects after I remove from the cached HashMap a kuku object , the size of the map stays the same and values() will return a also the removed kuku object as null when I use TreeMap to hold kuku objects after I remove from the cached TreeMap a kuku object , the size of the map decried by one and values() will return correct data Ideas? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4009471#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...