public abstract class Reference<T> extends Object
Modifier and Type | Method and Description |
---|---|
void |
clear()
Clears this reference object.
|
boolean |
enqueue()
Adds this reference object to the queue with which it is registered,
if any.
|
T |
get()
Returns this reference object's referent.
|
boolean |
isEnqueued()
Tells whether or not this reference object has been enqueued, either by
the program or by the garbage collector.
|
public T get()
null
.null
if this reference object has been clearedpublic void clear()
This method is invoked only by Java code; when the garbage collector clears references it does so directly, without invoking this method.
public boolean isEnqueued()
false
.true
if and only if this reference object has
been enqueuedpublic boolean enqueue()
This method is invoked only by Java code; when the garbage collector enqueues references it does so directly, without invoking this method.
true
if this reference object was successfully
enqueued; false
if it was already enqueued or if
it was not registered with a queue when it was created Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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