Has any one created "image validation" for a form using jsp or servlets

I have a couple of public forms that i would like to have Image Validation. (where the user has to type in what the image has printed to stop auto registration)

i have found a couple of php examples but my app is j2ee.

Thanks for any help/direction

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have a look at this project


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what u wanted  to know is called CAPTCHA "Completely Automated Public Turing test to Tell Computers and Humans Apart"

this is used to make sure that the client is human ( not software)
here is some usefull links:

i posted at the same time u assiend points :(
good luck any way
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Java EE

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