Java Concurrency in Practice — JUC Deep Dive
This book provides a comprehensive, interview-oriented guide to Java concurrency and the java.util.concurrent (JUC) package. It covers everything from thread fundamentals and the Java Memory Model to lock internals, atomic operations, and advanced synchronizers.
Target audience: Senior Java backend engineers preparing for technical interviews, or anyone looking to deepen their understanding of JVM concurrency internals and distributed systems primitives.
Topics covered:
- Thread lifecycle, daemon threads, and the monitor concept
CompletableFutureand asynchronous programming patterns- Lock taxonomy: optimistic vs. pessimistic, fair vs. unfair, reentrant, read-write
LockSupport, thread interruption, and the park/unpark mechanism- The Java Memory Model (JMM), happens-before, visibility, and ordering
volatilesemantics and memory barriers- CAS (Compare-And-Swap) and the
Unsafeclass - Atomic classes:
AtomicInteger,LongAdder,AtomicStampedReference, and more ThreadLocalinternals, weak references, and memory leak prevention- Java object memory layout: Mark Word, Klass Pointer, and alignment padding
synchronizedinternals and lock escalation (biased → lightweight → heavyweight)- AQS (AbstractQueuedSynchronizer) and the CLH queue
ReentrantLock,ReentrantReadWriteLock, andStampedLock