The Synchronized and Volatile Keywords
Explore how the synchronized and volatile keywords control access and visibility of shared state in Java multithreading. Understand their differences in mutual exclusion, atomicity, and visibility, enabling you to write thread-safe concurrent code with modern Java concurrency tools.
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When multiple threads access shared mutable state, we need to coordinate access and ensure that updates made by one thread are visible to others. Two key concerns in concurrent programming are atomicity and visibility. Java provides language features such as synchronized and volatile to address these concerns.
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Let’s explore the synchronized and volatile keywords and how they protect our code:
What is the synchronized keyword?
Note on virtual threads: In earlier Java versions (like Java 21), a virtual thread executing inside a
synchronizedblock could pin its underlying carrier platform thread, temporarily reducing application ...