数据结构－HashMap Hashtable HashSet
2015-03-04 00:24
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They are entirely different constructs. A
an implementation of
A Map maps keys to values. The key look up occurs using the hash.
On the other hand, a
an implementation of
A Set is designed to match the mathematical model of a set. A
use a
back its implementation, as you noted. However, it implements an entirely different interface.
HashMap:
http://www.pakzilla.com/2009/08/24/hashmap-vs-hashtable-vs-hashset/
HashMapis
an implementation of
Map.
A Map maps keys to values. The key look up occurs using the hash.
On the other hand, a
HashSetis
an implementation of
Set.
A Set is designed to match the mathematical model of a set. A
HashSetdoes
use a
HashMapto
back its implementation, as you noted. However, it implements an entirely different interface.
HashMap:
http://www.pakzilla.com/2009/08/24/hashmap-vs-hashtable-vs-hashset/
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