compact1, compact2, compact3
java.util
Interface Observer
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public interface ObserverA class can implement theObserverinterface when it wants to be informed of changes in observable objects.- Since:
- JDK1.0
- See Also:
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Observable
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description voidupdate(Observable o, Object arg)This method is called whenever the observed object is changed.
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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'snotifyObserversmethod to have all the object's observers notified of the change.- Parameters:
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o- the observable object. -
arg- an argument passed to thenotifyObserversmethod.
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