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Intrinsic Locks and Synchronization (The Java™ Tutorials > Essential Java Classes > Concurrency)

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The Java Tutorials have been written for JDK 8. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases. See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases. Synchronization is built around an internal entity known as the intrinsic lock or monitor lock. (The API specification often refers to this entity simply as a "monitor.") Intrinsic locks play a role in both aspects of synchronization: enforcing exclusive access to an object's state and establishing happens-before relationships that are essential to visibility. Every object has an intrinsic lock associated with it. By convention, a thread that needs exclusive and consistent access to an object's fields has to acquire the object's intrinsic lock before ac

Intrinsic Locks and Synchronization (The Java™ Tutorials > Essential Java Classes > Concurrency) Documentation The Java™ Tutorials External Link --> Hide TOC Concurrency Processes and Threads Thread Objects Defining and Starting a Thread Pausing Execution with Sleep Interrupts Joins The SimpleThreads Example Synchronization Thread Interference Memory Consistency Errors Synchronized Methods Intrinsic Locks and Synchronization Atomic Access Liveness Deadlock Starvation and Livelock Guarded Blocks Immutable Objects A Synchronized Class Example A Strategy for Defining Immutable Objects

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