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public interface java.util.Observer

(source file: Observer.java)
java.lang.Object
   |
   +----java.util.Observer

The pure class interface.
public interface Observer
A class can implement the Observer interface when it wants to be informed of changes in observable objects.

See also:
java.util.Observable

Methods

O update(Observable, Object)
This method is called whenever the observed object is changed

Methods

O update
public abstract 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.


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