1) hashtable extends Dictionary interface which is quite old while hashmap extends Map interface.
2) hashtalbe doesn't have counterpart like ConcurrentHashMap.
3) another important difference between hashtable and hashmap is , hashtable is less secure than hashmap because of Enumeration it uses. while hashmap uses iterator which prevents Concurrent Modification of HashMap, which is not possible in case of hashtable.
4) stay out of hashtable use hashmap instead.
2) hashtalbe doesn't have counterpart like ConcurrentHashMap.
3) another important difference between hashtable and hashmap is , hashtable is less secure than hashmap because of Enumeration it uses. while hashmap uses iterator which prevents Concurrent Modification of HashMap, which is not possible in case of hashtable.
4) stay out of hashtable use hashmap instead.
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