Added in API level 1

ReferenceQueue

open class ReferenceQueue<T : Any!>

kotlin.Any
↳	java.lang.ref.ReferenceQueue

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

Summary

Public constructors
`ReferenceQueue()` Constructs a new reference-object queue.

Public methods
open Reference<out T>!	`poll()` Polls this queue to see if a reference object is available.
open Reference<out T>!	`remove(timeout: Long)` Removes the next reference object in this queue, blocking until either one becomes available or the given timeout period expires.
open Reference<out T>!	`remove()` Removes the next reference object in this queue, blocking until one becomes available.

Public constructors

ReferenceQueue

Added in API level 1

ReferenceQueue()

Constructs a new reference-object queue.

Public methods

poll

Added in API level 1

open fun poll(): Reference<out T>!

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.

Return
`Reference<out T>!`	A reference object, if one was immediately available, otherwise `null`

remove

Added in API level 1

open fun remove(timeout: Long): Reference<out T>!

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`	Long: If positive, block for up to `timeout` milliseconds while waiting for a reference to be added to this queue. If zero, block indefinitely.

Return
`Reference<out T>!`	A reference object, if one was available within the specified timeout period, otherwise `null`

Exceptions
`java.lang.IllegalArgumentException`	If the value of the timeout argument is negative
`java.lang.InterruptedException`	If the timeout wait is interrupted

remove

Added in API level 1

open fun remove(): Reference<out T>!

Removes the next reference object in this queue, blocking until one becomes available.

Return
`Reference<out T>!`	A reference object, blocking until one becomes available

Exceptions
`java.lang.InterruptedException`	If the wait is interrupted