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

  • Constructor Summary

    Constructors
    Constructor
    Description
    Reference()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    clear()
    Clears this reference object.
    Object
    get()
    Returns this reference object's referent.

    Methods inherited from class Object

    clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
     
    boolean
    equals(Object obj)
    Indicates whether some other object is "equal to" this one.
    final Class
    getClass()
    Returns the runtime class of an object.
    int
    hashCode()
    Returns a hash code value for the object.
    final void
    notify()
    Wakes up a single thread that is waiting on this object's monitor.
    final void
    notifyAll()
    Wakes up all threads that are waiting on this object's monitor.
    String
    toString()
    Returns a string representation of the object.
    final void
    wait()
    Causes current thread to wait until another thread invokes the method or the method for this object.
    final void
    wait(long timeout)
    Causes current thread to wait until either another thread invokes the method or the method for this object, or a specified amount of time has elapsed.
    final void
    wait(long timeout, int nanos)
    Causes current thread to wait until another thread invokes the method or the method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.

  • Constructor Details

    • Reference

      public Reference()

  • Method Details

    • clear

      public void clear()
      Clears this reference object.

    • 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.