Sven Woltmann • 5/8/2025

Initialization-on-Demand Holder Idiom in Java

This technical article details the Initialization-on-Demand Holder idiom in Java, a pattern for secure and efficient lazy initialization of static fields in multithreaded applications. It covers the motivation for lazy loading, the pitfalls of naive implementations and complete synchronization, and provides a deep dive into the holder idiom's implementation and advantages over alternatives like Double-Checked Locking.

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#lazy initialization #design patterns #Java