Observer

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java.util
Interface Observer

public interface Observer

Interface that is implemented when a class wants to be informed of changes in Observable objects.

Method Summary

void update(Observable observable, java.lang.Object arg)
This method is called whenever the observable object changes, and has called notifyObservers.

Method Detail

update

public void update(Observable observable,
                   java.lang.Object arg)

This method is called whenever the observable object changes, and has called notifyObservers. The Observable object can pass arbitrary information in the second parameter.