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.

Foundation 1.1.2

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.
 

Method Detail

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.

Foundation 1.1.2

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 219 specification.