request.getParameter("var") should return a null if there is no variable
named var in your form input. You could test the return value to see if it
is null, and either report an error, set a default, etc:
String var = request.getParameter("var");
if (var == null)
{
var = "defaultvalue"; // or error processing, etc.
}
----- Original Message -----
From: Silvia Gaspar <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, August 18, 2000 4:35 AM
> Hello
>
> I'm trying to post some parameters in to a servlet from a html form, but
an
> error occurs - "500 internal error". I believe it's because the
> request.getParameter("var") doesn't return anything (due to some text
> fields being empty). I was wondering if someone could tell how I could
> overcome this situation - simply putting it, I was wondering how I could
> send in to the servlet, empty values without occurring this error.
>
> Thank you
>
>
>
> Com os nossos melhores cumprimentos,
> --------------------------------------------------------------------------
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> -------------------------------
> Compta - Equipamentos e Servi�os de inform�tica, S.A
>
> S�lvia Gaspar
> Engenharia de Sistemas e Aplica��es
> Implementa��o
> Consultora S�nior
> * TEL: +351.21. 350 14 00
> * Directo: +351.21. 313 55 51
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>
>
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