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Explain Java concurrency utilities.

Senior Java
Quick Answer java.util.concurrent provides: Executors/ExecutorService (thread pools), Future/CompletableFuture (async results), BlockingQueue (producer-consumer), ConcurrentHashMap/CopyOnWriteArrayList (thread-safe collections), AtomicInteger/AtomicReference (lock-free atomics), Semaphore/CountDownLatch/CyclicBarrier (coordination), and StampedLock/ReentrantReadWriteLock (read-write locking).

Answer

The java.util.concurrent package provides high-level concurrency support.
Includes ExecutorService, ThreadPoolExecutor, ScheduledExecutorService, BlockingQueue, Semaphore, CountDownLatch.
Reduces boilerplate synchronization and improves performance in multithreaded applications.
S
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