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Observer
public
interface
Observer
| java.util.Observer |
A class can implement the Observer interface when it
wants to be informed of changes in observable objects.
See also:
Summary
Public methods | |
|---|---|
abstract
void
|
update(Observable o, Object arg)
This method is called whenever the observed object is changed. |
Public methods
update
public abstract 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 |
Observable: the observable object. |
arg |
Object: an argument passed to the notifyObservers
method. |