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The purpose of hashCode()

Barkat Mardhani
Ranch Hand

Joined: Aug 05, 2002
Posts: 787
Will it be o.k. to return the unique key on the object as it's hashCode. For example, SSN for Person class and VIN for Vehicle class.
As purpose of hashCode is to evenly distribute objects in collection, this will put one object in each bucket...
Thomas Paul
mister krabs
Ranch Hand

Joined: May 05, 2000
Posts: 13974
hashCode has to return an int. Returning a unique int for each unique object is generally best.

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I agree. Here's the link:
subject: The purpose of hashCode()
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