In my web application i want to implement the OpenId just like stackoverflow.com have to login to its web-site.
In details you find while login to stackoverflow.com
So when if one choose google then it allow the uses to log in through google account.
Please tell me how to implement it in java web application in details. Is there any single api for login through different website like(yahoo,google,facebook,etc)
Not quite. Most of the ones you have mentioned simply use the OpenID protocol, however Facebook uses its own authorisation, so you would need to add that as a separate method.
Take a look at OpenID4Java
I have also used the openid-selector for the client side part.
Finally, I would take a look at the this resource to see the URL endpoints for the different providers.