import java.util.Observer;
import java.util.Observable;
public class Watcher implements Observer {
private int changes = 0;
public void update(Observable obs, Object arg) {
System.out.println( "Watcher : I see that the Subject holds now a "
+ ((ObservedSubject) obs ).returnValue() + ".");
changes++;
}
public int observedChanges() {
return changes;
}
}