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Interface java.util.Observer

public interface Observer

Since:

JDK1.0

See Also:

Observable

update(Observable, Object)

This method is called whenever the observed object is changed.

 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 - the observable object.

arg - an argument passed to the notifyObservers method.

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