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java.util
interface Observer
-
Most common way to construct:
-
Iterator observers = …;
Observer anObserver = (Observer)observers.next();
Based on 7 examples
public interface Observer
A class can implement the Observer
interface when it
wants to be informed of changes in observable objects.
Method Summary |
void |
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.
This documentation differs from the official API.
Jadeite adds
extra features to the API including:
variable font sizes,
constructions examples,
placeholders for classes and methods, and auto-generated “See Also” links.
Additionally it
is missing some items found in standard Javadoc documentation, including:
generics type information,
“Deprecated” tags and comments,
“See Also” links,
along with other minor differences.
Please send any questions or feedback to
bam@cs.cmu.edu.
This page displays the
Jadeite version of the documention, which is derived from the offical documentation that contains this copyright notice:
The official Sun™ documentation can be found here at
http://java.sun.com/javase/6/docs/api/.