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Expain me what is hashCode() method

 
Greenhorn
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1) why to override hashCode() method
we what difference it makes when override.
 
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See why we need to override hashcode when write equality method in Java here

 
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The article actually says how to override those methods, not why we should.
 
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Alessandro Ilardo wrote:The article actually says how to override those methods, not why we should.


Really? Pitfall #2 in the article explains quite clearly what hashCode() is used for, so this makes it clear when and why you should implement a hashCode() method.
 
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