Java hashmap, hashtable
When are you using hashmap and hashtable?View Answers
October 26, 2010 at 11:01 AM
Hi,
Here is the answer.
- The hashMap and Hashtable are differ from each other according to following points-
- HashMap allows null values for key and value whereas Hashtable doesnt allow.
- HashMap does not guarantee that the order of the map will remain constant over time.
- HashMap is non synchronized where as Hashtable is synchronized.
- HashTable is an Old java class but Hashmap is a new java class in java 2.
- In HashTable you can change the iteration but in the case of HashMap you can change the iteration but you will get a java.util.ConcurrentModificationException.
Thanks.
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