In NetBeans, Cookies are used for Service Discovery

Cookies are a predecessor of Lookups and serve the same purpose, more or less.

The point of cookies is to associate them with some kind of ability of a class.

NetBeans Wiki: Comparison of lookups and cookies

this type of cookie is used in the Schedule modules.

normally, it is used to register objects from XML layer

Want a cookie? here, have one! No, i insist! take it! now!

A cookie is a text file. Sometimes websites give you cookies to store your settings or preferences for that particular website, or to help themselves remember that you went to that website. You can delete all your cookies from time to time. If you think you've completely removed all traces of your activity relating to a website, you should check to make sure that you don't have a cookie file somewhere called yourusername@bittorent.txt etc. If you delete all your cookies you will find that your favorite websites don't remember your login any more.

here's a cookie from yahoo.com, called username@games.yahoo[1].txt

 CP
 null*
 games.yahoo.com/
 1088
 1761935360
 30785590
 2453420576
 29891694
 *

You can find all the cookies stored on your computer by going to SystemFilesystem/<this layer in context>/Favorites/Home/Cookies