Donovan Data Systems
Agora conhecido(a) como Mediaocean
Essa empresa é sua?
Pergunta de entrevista da empresa Donovan Data Systems
What is the difference between HashMap and Hashtable?
Resposta da entrevista
Sigiloso
27 de mai. de 2011
Stock question every employer seems to ask. To save you the trouble of looking it up, Hashtable is synchronized, HashMap is not, Hashtable doesn't allow nulls, HashMap allows one null key and null objects.