JAVA线程的高级同步[7]

[入库：2006年2月23日] [更新：2007年3月24日]

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The Semaphore interface is very similar to the Lock interface. The acquire() and release() methods are similar to the lock() and unlock() methods of the Lock interface--they are used to grab and release permits, respectively. The tryAcquire( ) methods are similar to the tryLock() methods in that they allow the developer to try to grab the lock or permits. These methods also allow the developer to specify the time to wait if the permits are not immediately available and the number of permits to acquire or release (the default number of permits is one).

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本文关键：JAVA线程的高级同步

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