saripella

• Jun 9th, 2005

 

Hashtable is synchronized whereas Hashmap is not

ashok

• Jun 29th, 2005

 

Hashmap can contains null values as the keys and as well as values.But Hashtable dose not allow null values as keys and values. 
hashtable is syncroniged.hashmap is not syncroniged.hashtable can change the iterator.

Madhavan Elango

• Jul 5th, 2005

 

There are three differences: 
 
- access to Hashtable is synchronized whereas access ro hashMap is not. 
- HashMap allows null values as keys and values whreas Hashtable is not 
-Hashtable is one of the original collections of Java but HashMap is added with Java 2, v1.2