YMSG (without the j) is the protocol used by Yahoo's instant messaging and chat software. jYMSG is a Java API that allows you to interact programmatically with Yahoo's messaging and chat services. For example, with jYMSG you can have an instant message sent to your system administrator from your J2EE application server when a critical error requiring attention occurs. Sending a Yahoo instant message via Java is made quite easy with jYMSG. This article shows you how to build a Swing-based application through which you can instant message your Yahoo messaging partners. Though it will not be as feature rich as the Yaoo! Instant Messenger client, you will get a good introduction to the power of jYMSG.
