cookie is small amount of data and it's store on the client
machine that is your browser machine

..Developer to create cookie and set the life time of cookie
on our web application
example

cookie.setMaxAge(1000);

the cookie available in 1000ms

cookie is a"small amount of data" that is set by the server
on the client.

we have setmaxAge() for destroy cookie.

1.cookie.setMaxAge(100)-->100 sec
     If we set the max age of a cookie to 100 sec,the browser 
holds the cookie for 100 sec even if we close the browser.

2.If we set max age value to negative value the browser hold
the cookie till we close the browser.

3.If we use setMaxAge(0) the browser will arase the cookie.

when we disable the cookies inside the client browser or if
the cookie age is finished which is set as
cookie.setMaxAge(mins*secs);

when we disable the cookies inside the client browser or if
the cookie age is finished which is set as
cookie.setMaxAge(mins*secs);