Java Tutorial Equals Vs Hashcode - Latest Information & Updates 2026

Web Reference: Jan 8, 2024 · In this tutorial, we’ll introduce two methods that closely belong together: . equals () and . hashCode (). We’ll focus on their relationship with each other, how to correctly override them, and why we should override both or neither. Jul 23, 2025 · Java.lang.object has two very important methods defined: public boolean equals (Object obj) and public int hashCode (). In java equals () method is used to compare equality of two Objects. The equality can be compared in two ways: If two objects are equal as per the equals() method, then calling the hashCode() method in each of the two objects must return the same integer result. So, If a field is not used in equals(), then it must not be used in hashCode() method.

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