EDU.oswego.cs.dl.util.concurrent
Class ConcurrentHashMap.Entry
protected static
class
ConcurrentHashMap.Entry
extends Object
implements Entry
ConcurrentHashMap collision list entry.
protected final int hash
protected final Object key
protected volatile Object value
public boolean equals(Object o)
public Object getKey()
public Object getValue()
Get the value. Note: In an entrySet or entrySet.iterator,
unless you can guarantee lack of concurrent modification,
getValue might return null, reflecting the
fact that the entry has been concurrently removed. However,
there are no assurances that concurrent removals will be
reflected using this method.
Returns: the current value, or null if the entry has been
detectably removed.
public int hashCode()
public Object setValue(Object value)
Set the value of this entry. Note: In an entrySet or
entrySet.iterator), unless you can guarantee lack of concurrent
modification,
setValue is not strictly guaranteed to
actually replace the value field obtained via the
get
operation of the underlying hash table in multithreaded
applications. If iterator-wide synchronization is not used,
and any other concurrent
put or
remove
operations occur, sometimes even to
other entries,
then this change is not guaranteed to be reflected in the hash
table. (It might, or it might not. There are no assurances
either way.)
Parameters: value the new value.
Returns: the previous value, or null if entry has been detectably
removed.
Throws: NullPointerException if the value is null
.
public String toString()