This is one more tricky question for average Java programmer, if he can bring the fact about whether lock is released or not is key indicator of his understanding. To answer this question, no matter how you exist synchronized block, either normally by finishing execution or abruptly by throwing exception, thread releases the lock it acquired while entering that synchronized block. This is actually one of the reason I like synchronized block over lock interface, which requires explicit attention to release lock, generally this is achieved by releasing lock in finally block.
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