Use is subject to License Terms. Your use of this web site or any of its content or software indicates your agreement to be bound by these License Terms.
Copyright © 2006 Sun Microsystems, Inc. All rights reserved.
java.util
Interface Observer
- public interface Observer
A class can implement the Observer
interface when it
wants to be informed of changes in observable objects.
- Since:
- JDK1.0
- See Also:
Observable
Method Summary |
void |
update(Observable o,
Object arg)
This method is called whenever the observed object is changed. |
update
public 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.
Copyright © 2006 Sun Microsystems, Inc. All rights reserved. Use is subject to License Terms. Your use of this web site or any of its content or software indicates your agreement to be bound by these License Terms.
For more information, please consult the JSR 217 specification.