public final class Ref<E> extends Object
E
get()
boolean
isEmpty()
isPresent()
Ref<E>
lock()
static <E> Ref<E>
of()
of(E value)
set(E value)
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public E get()
public Ref<E> set(E value)
public Ref<E> lock()
public boolean isPresent()
public boolean isEmpty()
public static <E> Ref<E> of()
public static <E> Ref<E> of(E value)