Actually is should be:
if(null == temp || temp.length() == 0)
Then you won't get a nullPointerException if it IS null. capice?
John D. McDonald
ClientScience.com
Phone: 925.373.8700
Fax: 413.793.6603
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----- Original Message -----
From: Floyd Marinescu <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, January 24, 2000 7:53 AM
Subject: Re: Absolute frustration
> >If the radio wasn't checked at all the first line of output will be
> >null, but if I test against that I get a NullPointerException. If I
> >use:
>
> You shouldn't get a null pointer exception if you are testing properly:
> The way you would normally test to see if its null (hasn't been
checked)is:
> String temp = req.getParameter("radio1");
> if(temp == null)
> {
> file://do something
> }
>
>
> >out.println(req.getParameterValues("radio1"));
> >I get something like:
> >[Ljava.lang.String;@7310a09a
> This is because getParameters always returns a string[]. Even an empty
array,
> but it won't return you a null. You can check this one like this:
> String[] s = req.getParameterValues("radio1");
> if (s.length == 0)
> file://do something
>
>
> >I don't need the memory address, I need the string in the memory
> >address.
> Hahaha, this is Java my friend, no need to worry about memory
addresses.
>
>
> >Thanks for ANY help given.
> Ok, here is the proper way to validate radio/check buttons. In your
html,
> give each radio button the same name (ie: not radio1, 2, 3, but just radio
for
> all of them).
> In your servlet you do a req.getParameterValues, and then iterate
through
> the returned array to get the data you want.
>
> Hope this helps.
>
> Floyd
>
>
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