How to get username of currently logged user on client machine in Java?

Question

When the user (client) tries to get into the application by typing the URL, i need to get that machine\'s windows logged in username.

I have tried with System.get

Answer 1

For security purposes the amount of data applications running in a browser can access is limited. As far as I know, the only thing which is allowed access to client related data would be a Signed Applet.