public interface Observer
Observerinterface when it wants to be informed of changes in observable objects.
void update(Observable o, Object arg)
notifyObserversmethod to have all the object's observers notified of the change.
o- the observable object.
arg- an argument passed to the
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2019, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.