Java Concurrency 面试题与答案
问题 21. Explain the concept of the CopyOnWriteArrayList class.
CopyOnWriteArrayList is a thread-safe variant of ArrayList in which all mutative operations (add, set, etc.) are implemented by making a fresh copy of the underlying array.
问题 22. What is the purpose of the Phaser class in Java?
Phaser is a synchronization barrier that allows a set of threads to wait for each other to reach a common phase before proceeding.
问题 23. Explain the concept of the ReadWriteLock interface.
ReadWriteLock provides a pair of associated locks for read and write access, allowing multiple threads to read the data concurrently or a single thread to write it exclusively.
问题 24. What is the purpose of the ScheduledExecutorService interface?
ScheduledExecutorService is an extension of ExecutorService that supports delayed and periodic task execution.
问题 25. Explain the concept of the BlockingQueue interface.
BlockingQueue is a queue that supports operations that wait for the queue to become non-empty when retrieving an element and wait for space to become available when storing an element.
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