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public interface Observer
A class can implement theObserver
interface when it wants to be informed of changes in observable objects.- Since:
- JDK1.0
- See Also:
Observable
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Method Summary
Methods Modifier and Type Method and Description void
update(Observable o, Object arg)
This method is called whenever the observed object is changed.
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Method Detail
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update
void update(Observable o, Object arg)
This method is called whenever the observed object is changed. An application calls an Observable object'snotifyObservers
method to have all the object's observers notified of the change.- Parameters:
o
- the observable object.arg
- an argument passed to thenotifyObservers
method.
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Steph