Youzan Coder
Jul 8, 2021 · Backend Development
Deep Dive into Java Thread States and Synchronized Lock Implementation
The article thoroughly explains Java thread states and how the synchronized keyword is implemented, detailing the mapping to OS thread states, the object header’s Mark Word, biased, lightweight and heavyweight locking, CAS‑based state transitions, bytecode monitor instructions, lock upgrades, and optimal usage scenarios.
JVM internalsJavaThread States
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