ajax response call in vaadin

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hiiii
i am trying to use j query in vaadin application
but i face a problem when i using ajax call
the thing is i can make a ajax call and call a method in my application
but i dont know how to get response … to my jquery
i got a value in my application i need to pass that value into my jquery as response …
plz help me
its urgent
plz any one help me
thanks…

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