java.lang.ref
Class Reference

java.lang.Object
  |
  +--java.lang.ref.Reference
Direct Known Subclasses:
WeakReference

public abstract class Reference
extends Object

Abstract base class for reference objects. This class defines the operations common to all reference objects. Because reference objects are implemented in close cooperation with the garbage collector, this class may not be subclassed directly.

Since:
JDK1.2, CLDC 1.1

Method Summary
 void clear()
          Clears this reference object.
 Object get()
          Returns this reference object's referent.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

clear

public void clear()
Clears this reference object.
Since:
JDE 4.0.0

get

public Object get()
Returns this reference object's referent. If this reference object has been cleared, either by the program or by the garbage collector, then this method returns null.
Returns:
The object to which this reference refers, or null if this reference object has been cleared
Since:
JDE 4.0.0



Copyright 1999-2009 Research In Motion Limited. 295 Phillip Street, Waterloo, Ontario, Canada, N2L 3W8. All Rights Reserved.
Copyright 1993-2003 Sun Microsystems, Inc. 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
Copyright 2002-2003 Nokia Corporation All Rights Reserved.
Java is a trademark or registered trademark of Sun Microsystems, Inc. in the US and other countries.