Posting your question in the wrong place is a good way to make sure that it never gets answered. Please take more care in the future.
Ambika Nagalakshmi wrote:can any know how to use jQuery in java applications?
Because jQuery operates on the client and Java on the server, they don't really have much to do with each other. So you just use jQuery on the pages, just use it like you would in any other HTML pages.
The only possible "trick" you need to be aware of is when using frameworks that make you use lots of custom tags in the JSPs rather than pure HTML (I avoid such frameworks as much as I can). You need to be aware of what HTML is generated by these tags because that's what gets sent to the browser, and that's what JavaScript (and jQuery) will "see".