File Doc Category Size Date Package
Observer.java API Doc Java SE 5 API 922 Fri Aug 26 14:57:24 BST 2005 java.util

Observer

public interface Observer

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

author: Chris Warth
version: 1.19, 12/19/03
see: java.util.Observable
since: JDK1.0

Fields Summary
Constructors Summary
Methods Summary
public void update(java.util.Observable o, java.lang.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.
param
o the observable object.
param
arg an argument passed to the notifyObservers method.