Interface Observer
@Deprecated(since="9") public interface Observer
Observable
class for further information.A class can implement the Observer
interface when it wants to be informed of changes in observable objects.
- Since:
- 1.0
- See Also:
Observable
Method Summary
Modifier and Type | Method | Description |
---|---|---|
void | update(Observable o,
Object arg) | Deprecated. This method is called whenever the observed object is changed. |
Method Detail
update
void update(Observable o, Object arg)
This method is called whenever the observed object is changed. An application calls an Observable
object's notifyObservers
method to have all the object's observers notified of the change.
- Parameters:
-
o
- the observable object. -
arg
- an argument passed to thenotifyObservers
method.