File	Doc	Category	Size	Date	Package
AtomicReference.java	API Doc	Java SE 6 API	3530	Tue Jun 10 00:25:58 BST 2008	java.util.concurrent.atomic

AtomicReference

• java.lang.Object

Fields Summary
private static final long	serialVersionUID
private static final Unsafe	unsafe
private static final long	valueOffset
private volatile V	value

Constructors Summary
public AtomicReference(V initialValue) Creates a new AtomicReference with the given initial value. param initialValue the initial value value = initialValue;
public AtomicReference() Creates a new AtomicReference with null initial value.

Methods Summary
public final boolean	compareAndSet(V expect, V update) Atomically sets the value to the given updated value if the current value {@code ==} the expected value. param expect the expected value param update the new value return true if successful. False return indicates that the actual value was not equal to the expected value. return unsafe.compareAndSwapObject(this, valueOffset, expect, update);
public final V	get() Gets the current value. return the current value return value;
public final V	getAndSet(V newValue) Atomically sets to the given value and returns the old value. param newValue the new value return the previous value while (true) { V x = get(); if (compareAndSet(x, newValue)) return x; }
public final void	lazySet(V newValue) Eventually sets to the given value. param newValue the new value since 1.6 unsafe.putOrderedObject(this, valueOffset, newValue);
public final void	set(V newValue) Sets to the given value. param newValue the new value value = newValue;
public java.lang.String	toString() Returns the String representation of the current value. return the String representation of the current value. return String.valueOf(get());
public final boolean	weakCompareAndSet(V expect, V update) Atomically sets the value to the given updated value if the current value {@code ==} the expected value. May fail spuriously and does not provide ordering guarantees, so is only rarely an appropriate alternative to {@code compareAndSet}. param expect the expected value param update the new value return true if successful. return unsafe.compareAndSwapObject(this, valueOffset, expect, update);