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A writable sink for bytes.Most clients will use output streams that write data
to the file system (
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Timers schedule one-shot or recurring TimerTask for execution. Prefer
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A java.util.Queue that additionally supports operations that wait for the queue
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A task that returns a result and may throw an exception. Implementors define a
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
#acquire blocks if
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