Is there another issue here that I'm not getting from the thread.
It seem to me doing
String val = req.getParameter("paramName");
if(val !=null && val.length() > 0)
{
// The tag is valid
}
else
{
// The tag isn't valid
}
will do it.
Is there more?
- gene
----- Original Message -----
From: "Milt Epstein" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, April 04, 2001 9:46 AM
Subject: Re: Simple Problem....
> On Wed, 4 Apr 2001, Dominic O'Reirdan wrote:
>
> > I just did this.
> >
> > if(req.getParameter("paramName").length() != 0) {
> >
> > do your code
> >
> > } else {
> > throw an exception or something
> > }
>
> Well, this isn't really safe either, because you should check whether
> it is null first. getParameter() can return null. It will do so when
> the parameter does not exist (which is different than it being empty,
> which is what you're checking for above).
>
> Now if you're always using parameter names that you know will exist --
> i.e. you know they exist in the form, even if you don't know that they
> will get set to anything -- then you won't run into any instances of
> getParameter() returning null. But that's not really safe programming
> style.
>
>
> > At 19:21 04/04/01 +0530, you wrote:
> > >The message of the story:
> > >In Java String class behaves like a primitive data type..
> > >
> > >hope it helps..
> > >
> > >thanks
> > >donny.
>
> Milt Epstein
> Research Programmer
> Software/Systems Development Group
> Computing and Communications Services Office (CCSO)
> University of Illinois at Urbana-Champaign (UIUC)
> [EMAIL PROTECTED]
>
>
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