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According to the \[[API 06|AA. Java References#API 06]\] class {{java.lang.Object |
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If two objects are equal according to the
equals(Object)method, then calling the hashCode method on each of the two objects must produce the same integer result.
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Failure to follow this contract is a source of common bugs. Notably, immutable objects need not override the hashcode() method.
Noncompliant Code Example
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