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Amirtharaj Chinnaraj
Ranch Hand

Joined: Sep 28, 2006
Posts: 236
hi guys

i want to know the use of this interface

looking for your replies
Christophe Verré

Joined: Nov 24, 2005
Posts: 14687

It's mainly used in web/enterprise projects, to identify a user. For example, if you use a proper login system for a web application, the web container will make an instance of a Principal to identify the logged in user.

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Amirtharaj Chinnaraj
Ranch Hand

Joined: Sep 28, 2006
Posts: 236
please give me some more details

Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 14074

Read the JDK documentation: Security

Also, try searching for "" with Google and you'll probably find more info.

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I agree. Here's the link:
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