Package java.util

Interface Observer

public interface Observer
Observer is the interface to be implemented by objects that receive notification of updates on an Observable object.
See Also:
Observable

  • Method Summary

    Modifier and Type Method Description
    void update​(Observable observable, Object data)
    This method is called if the specified Observable object's notifyObservers method is called (because the Observable object has been updated.

  • Method Details

    • update

      void update​(Observable observable, Object data)
      This method is called if the specified Observable object's notifyObservers method is called (because the Observable object has been updated.
      Parameters:
      observable - the Observable object.
      data - the data passed to Observable.notifyObservers(Object).