Java Observable.clearChanged()

protected void clearChanged()

//from w w  w. j  av a2  s. c  om

import java.util.Observable;
import java.util.Observer;

class ObservedObject extends Observable {
   private String watchedValue;
   
   public ObservedObject(String value) {
      watchedValue = value;
   }
   
   public void setValue(String value) {
      if(!watchedValue.equals(value)) {
         watchedValue = value;
         
         setChanged();
      }
   }
   public void resetValue() {
      clearChanged();
   }
}
class MainObserver implements Observer {

   
   public void update(Observable obj, Object arg) {
      System.out.println("Update called");
   }
}

public class Main{
   public static void main(String[] args) {
      ObservedObject watched = new ObservedObject("Original Value");

      MainObserver watcher = new MainObserver();

      watched.addObserver(watcher);

      watched.setValue("New Value");

      if(watched.hasChanged())
         System.out.println("Value changed");
      else
         System.out.println("Value not changed");


      watched.resetValue();

      if(watched.hasChanged())
         System.out.println("Value changed");
      else
         System.out.println("Value not changed");      
   }

}