Java FAQ: Top Questions

StampedLock , introduced in Java 8 in java.util.concurrent.locks , is a lock that supports optimistic reading, offering better performance than ReentrantReadWriteLock in some scenarios.

• Locks: Write lock (exclusive), read lock (shared), optimistic read (non-blocking).
• Stamp: A long value returned by lock operations, used for unlocking or validation.
• Optimistic Read: Allows reading without locking, validated later.
• Use Case: High-read, low-write scenarios, like caches.