1 *java.lang.ref.Reference* *Reference* Abstract base class for reference objects.
3 public abstract class Reference
4 extends |java.lang.Object|
6 |java.lang.ref.Reference_Description|
7 |java.lang.ref.Reference_Fields|
8 |java.lang.ref.Reference_Constructors|
9 |java.lang.ref.Reference_Methods|
11 ================================================================================
13 *java.lang.ref.Reference_Methods*
14 |java.lang.ref.Reference.clear()|Clears this reference object.
15 |java.lang.ref.Reference.enqueue()|Adds this reference object to the queue with
16 |java.lang.ref.Reference.get()|Returns this reference object's referent.
17 |java.lang.ref.Reference.isEnqueued()|Tells whether or not this reference objec
19 *java.lang.ref.Reference_Description*
21 Abstract base class for reference objects. This class defines the operations
22 common to all reference objects. Because reference objects are implemented in
23 close cooperation with the garbage collector, this class may not be subclassed
27 *java.lang.ref.Reference.clear()*
31 Clears this reference object. Invoking this method will not cause this object
35 *java.lang.ref.Reference.enqueue()*
37 public boolean enqueue()
39 Adds this reference object to the queue with which it is registered, if any.
42 Returns: true if this reference object was successfully enqueued; false if it was
43 already enqueued or if it was not registered with a queue when it
45 *java.lang.ref.Reference.get()*
47 public |java.lang.Object| get()
49 Returns this reference object's referent. If this reference object has been
50 cleared, either by the program or by the garbage collector, then this method
54 Returns: The object to which this reference refers, or null if this reference object has
56 *java.lang.ref.Reference.isEnqueued()*
58 public boolean isEnqueued()
60 Tells whether or not this reference object has been enqueued, either by the
61 program or by the garbage collector. If this reference object was not
62 registered with a queue when it was created, then this method will always
66 Returns: true if and only if this reference object has been enqueued