@Deprecated(since="9") public interface Observer
Observer
interface when it wants to be informed of changes in observable objects.Modifier and Type | Method | Description |
---|---|---|
void |
update |
Deprecated. This method is called whenever the observed object is changed. |
void update(Observable o, Object arg)
Observable
object's notifyObservers
method to have all the object's observers notified of the change.o
- the observable object.arg
- an argument passed to the notifyObservers
method.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/util/Observer.html
Observable
class for further information.