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Architect's Tech Stack
Architect's Tech Stack
Dec 1, 2019 · Fundamentals

Why Java's String.hashCode Uses 31 as Multiplier: Theory and Experiments

This article explores the rationale behind Java's String.hashCode method using the multiplier 31, detailing its implementation, mathematical justification, performance optimizations, and experimental analysis of hash collision rates with various multipliers, concluding why 31 is an optimal choice.

HashCodeJavacollision analysis
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Why Java's String.hashCode Uses 31 as Multiplier: Theory and Experiments