Equals and Hashcode Contract in Java [Important Java Interview Question] | @JavaExpress

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Equals and Hashcode Contract in Java [Important Java Interview Question] | @JavaExpress
we have covered Equals and hashcode contract || Equals and hashcode in Java

JDK is based on memory location — two objects are equal if and only if they are stored in the same memory address.

How equals and hashcode contract works in java ?

The default implementation is not enough to satisfy business needs, especially if we're talking about a huge application that considers two objects as equal when some business fact happens. In some business scenarios, developers provide their own implementation in order to force their own equality mechanism regardless the memory addresses.

As per the Java documentation in perspective of equal and hashcode contract, developers should override both methods in order to achieve a fully working equality mechanism — it's not enough to just implement the equals() method.

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