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Difference between HashSet and HashMap in Java

2015-07-21 16:36 621 查看
Hash Map
Hash Set
HashMap  is a implementation of Map interface
HashSet is an implementation of Set Interface
HashMap Stores data in form of  key value pair
HashSet Store only objects
Put method is used to add element in map
Add method is used to add element is Set
In hash map hashcode value is calculated using key object
Here member object is used for calculating hashcode value which can be same for two objects so equal () method is used to check for equality if it returns false that means two objects are different.
HashMap is faster than hashset because unique key is used to access object
HashSet is slower than Hashmap
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标签：  java hashmap hashset
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