public interface

Observer

java.util.Observer

Class Overview

A class can implement the Observer interface when it wants to be informed of changes in observable objects.

See Also

Summary

Public Methods
abstract void update(Observable o, Object arg)
This method is called whenever the observed object is changed.

Public Methods

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.