Does the hash code function in String.hashCode() ever repeat?
Article ID: KB0094272
Updated On:
| Products | Versions |
|---|---|
| TIBCO BusinessEvents Enterprise Edition | - |
| Not Applicable | - |
Description
Resolution:
Description:
============
Does the hash code ever repeat or is it a perfect hash?
Environment:
==========
All
Symptoms:
=========
N/A
Resolution:
=========
The hash code will eventually repeat. The biggest integer is 10 characters however the biggest string is 2 billion characters. In addition one has to consider all of the combinations you can get in a 2 billion character strings so the hash value returned will eventually repeat.
Description:
============
Does the hash code ever repeat or is it a perfect hash?
Environment:
==========
All
Symptoms:
=========
N/A
Resolution:
=========
The hash code will eventually repeat. The biggest integer is 10 characters however the biggest string is 2 billion characters. In addition one has to consider all of the combinations you can get in a 2 billion character strings so the hash value returned will eventually repeat.
Issue/Introduction
Does the hash code function in String.hashCode() ever repeat?
Feedback
Yes
No
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