Web Reference: Dec 8, 2025 · Simply put, hashCode () returns an integer value, generated by a hashing algorithm. Objects that are equal (according to their equals ()) must return the same hash code. Learn how to use the hashCode() method to return the hash code of a string in Java. The hash code is computed by multiplying each character of the string by a power of 31 and adding them up. Every Java class inherits a hashCode() method that returns an integer representation of that object. While this might seem like a minor technical detail, understanding hashCode() is crucial for writing correct Java applications.
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