||Creates a cookie, a small amount of information sent by a servlet to
a Web browser, saved by the browser, and later sent back to the server
when the client accesses the same Web page.
||Provides an abstract class that you can subclass to create
an HTTP servlet, which receives requests from and
sends responses to a Web site.
||Sent by a session to an object that implements
HttpSessionBindingListener when the object is
bound to or unbound from the session.
||Provides a collection of methods that are useful
in writing HTTP servlets.