setValue
public Object setValue(Object value)
Set the value of this entry. Note: In an entrySet or
entrySet.iterator), unless the set or iterator is used under
synchronization of the table as a whole (or you can otherwise
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 multi-threaded 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.)
- Specified by:
setValue
in interface Map.Entry
- Parameters:
value
- the new value.
- Returns:
- the previous value, or null if entry has been detectably
removed.
- Throws:
NullPointerException
- if the value is null
.