I want to update the data on my webpage ,
without refresh the whole page,
How can I use applet in my webpage

Hi,

to include applet in webpage
use applet tag like <applet code="MyApplet.class" width=100 height=140></applet>

check
http://java.sun.com/j2se/1.4.2/docs/...sc/applet.html

include some more description in your question..

Cheers,

jomet.
---------------------------------------------
Once you start a working on something,
dont be afraid of failure and dont abandon it.
People who work sincerely are the happiest.

You would use applet if you have want a richer UI to display very dynamic streaming data like a stock ticker for instance. Though alot of what could be done with applets can also be done with AJAX nowadays. If you want to refresh your page every few seconds you could use the META tag for example :
<META HTTP-EQUIV="Refresh" CONTENT="3;URL=Foo.jsp"> this would refresh your JSP every 3 seconds.