Sven Woltmann • 5/8/2025

Double-Checked Locking in Java

This technical article delves into the Double-Checked Locking pattern in Java, a technique for efficient, thread-safe lazy initialization. It details the motivation, explains why naive lazy initialization is flawed in multi-threaded environments, and analyzes subtle race conditions and cache effects. The guide provides the correct implementation in Java and discusses alternatives for safe singleton creation.

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#concurrency #design patterns #Java