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0N/Apackage java.util;
0N/A
0N/A/**
0N/A * A class can implement the <code>Observer</code> interface when it
0N/A * wants to be informed of changes in observable objects.
0N/A *
0N/A * @author Chris Warth
0N/A * @see java.util.Observable
0N/A * @since JDK1.0
0N/A */
0N/Apublic interface Observer {
0N/A /**
0N/A * This method is called whenever the observed object is changed. An
0N/A * application calls an <tt>Observable</tt> object's
0N/A * <code>notifyObservers</code> method to have all the object's
0N/A * observers notified of the change.
0N/A *
0N/A * @param o the observable object.
0N/A * @param arg an argument passed to the <code>notifyObservers</code>
0N/A * method.
0N/A */
0N/A void update(Observable o, Object arg);
0N/A}