java.lang.Object
java.lang.ref.ReferenceQueue<T>
- Type Parameters:
- T- the type of the reference object
Reference queues, to which registered reference objects are appended by the
 garbage collector after the appropriate reachability changes are detected.
- Since:
- 1.2
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionpoll()Polls this queue to see if a reference object is available.remove()Removes the next reference object in this queue, blocking until one becomes available.remove(long timeout) Removes the next reference object in this queue, blocking until either one becomes available or the given timeout period expires.
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Constructor Details- 
ReferenceQueuepublic ReferenceQueue()Constructs a new reference-object queue.
 
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Method Details- 
pollPolls this queue to see if a reference object is available. If one is available without further delay then it is removed from the queue and returned. Otherwise this method immediately returnsnull.- Returns:
- A reference object, if one was immediately available,
          otherwise null
 
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removeRemoves the next reference object in this queue, blocking until either one becomes available or the given timeout period expires.This method does not offer real-time guarantees: It schedules the timeout as if by invoking the Object.wait(long)method.- Parameters:
- timeout- If positive, block for up to- timeoutmilliseconds while waiting for a reference to be added to this queue. If zero, block indefinitely.
- Returns:
- A reference object, if one was available within the specified
          timeout period, otherwise null
- Throws:
- IllegalArgumentException- If the value of the timeout argument is negative
- InterruptedException- If the timeout wait is interrupted
 
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removeRemoves the next reference object in this queue, blocking until one becomes available.- Returns:
- A reference object, blocking until one becomes available
- Throws:
- InterruptedException- If the wait is interrupted
 
 
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