Por favor, lembre-se que esta tradução da especificação é resultado de um projeto da comunidade java.net( https://jdk5-api-pt-br.dev.java.net/). A versão oficial da especificação é a versão na língua inglesa que pode ser encontrada em http://java.sun.com/j2se/1.5.0/docs/api/. Em caso de divergências, a versão predominante da especificação é a original em inglês.

Please note that this translation of the specification is the result of a java.net community project ( https://jdk5-api-pt-br.dev.java.net/ ). The official version of the specification is the US English language version which can be found at http://java.sun.com/j2se/1.5.0/docs/api/. In case of disputes, the authoritative version of the specification is the original, English document.

java.lang.ref
Class ReferenceQueue<T>

java.lang.Object
  java.lang.ref.ReferenceQueue<T>

public class ReferenceQueue<T>
extends Object

Reference queues, to which registered reference objects are appended by the garbage collector after the appropriate reachability changes are detected.

Since:

1.2

Constructor Summary

ReferenceQueue()
Constructs a new reference-object queue.

Method Summary

Reference<? extends T>	poll() Polls this queue to see if a reference object is available.
Reference<? extends T>	remove() Removes the next reference object in this queue, blocking until one becomes available.
Reference<? extends T>	remove(long timeout) Removes the next reference object in this queue, blocking until either one becomes available or the given timeout period expires.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReferenceQueue

public ReferenceQueue()

Constructs a new reference-object queue.

Method Detail

poll

public Reference<? extends T> poll()

Polls 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 returns null.

Returns:

A reference object, if one was immediately available, otherwise null

remove

public Reference<? extends T> remove(long timeout)
                              throws IllegalArgumentException,
                                     InterruptedException

Removes 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 timeout milliseconds 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

remove

public Reference<? extends T> remove()
                              throws InterruptedException

Removes 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