Observer JDK 1.6)

java.util. Observer View Source

Author(s)

Chris Warth

Since

JDK1.0

Version

1.20, 11/17/05

Serial

Hierarchy

Observer

Subinterfaces

Quick Links: Methods Fields

Description

public interface Observer

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

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

See also: Observable

Methods

Hide/Show inherited methods

public void update (Observable o, Object arg)

This method is called whenever the observed object is changed.

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.

Fields

Hide/Show inherited fields