yahoo connectivity with java code

I want to develop a yahoo client (core java) which connects to yahoo messenger ,checks for the authentication and login through java code.

I have already used jymsg api ,but since yahoo changed its protocol after august 15,2009 i m not able to connect to yahoo server through java code.Is there any api or source available?Do i need to change the authentication method开发者_如何学Go.help in this 2 resolve problem.

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Here is a Yahooo Instant Messaging API for you.