jsp - Getting null using request.getParameter(abc) when it loads for the first time -


when call request.getparameter("paramname") in jsp program giving me null when page first loads.after submitting again same page giving me correct value.why first time getting null?

for first time when page loads doing request, if not appending paramname url below displayed null only

http://serverurl?paramname=paramvalue

in second time during submission, have paramname in asp below. form data bundled during submission , getting value instead of null.

<input name="paramname" type="hidden" value="paramvalue">

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