public interface Observer

Since:

JDK1.0

See Also:

Observable

• Method Summary

  All Methods

  Modifier and Type	Method	Description
  void	update (Observable o, Object arg)	This method is called whenever the observed object is changed.

• Method Detail

  • update

    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.