s is null unitl a user enters some data, so there wil be a possiblity that
the variable will be null. This is my problem
John D. McDonald
CipherStream Systems
Phone: 925.373.8700
Fax: 413.793.6603
email: [EMAIL PROTECTED]
web: www.cipherstream.com
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----- Original Message -----
From: Mark Foley <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, January 05, 2000 4:22 PM
Subject: Re: Checking for null
> Hi,
>
> Wouldn't your conditional statement cause a null pointer exception if s is
> null? Try it!
>
> I do this:
> ...
> if(null != s) {
> if(s.length() != 0) {
> // it's not null and it's not empty
> }
> }
>
> Regards,
> Mark
>
> > -----Original Message-----
> > From: Richard Clark [SMTP:[EMAIL PROTECTED]]
> > Sent: Thursday, 6 January 2000 10:34
> > To: [EMAIL PROTECTED]
> > Subject: Re: Checking for null
> >
> > To check for both null and zero length:
> >
> > String s = req.getParameter("value");
> > if (null == s || s.length() == 0) {
> > // it's null or empty
> > }
> >
> > For just null, use (null == s)
> >
> > ...Richard
> >
> > -----Original Message-----
> > From: John McDonald [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, January 05, 2000 3:03 PM
> > To: [EMAIL PROTECTED]
> > Subject: [SERVLET-INTEREST] Checking for null
> >
> >
> > I am retrieving a value from a web page with req.getParameter("value").
> > How
> > do I check if the string is null without getting a null pointer
exception.
> > Any ideas would be helpful.
> >
> >
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>
>
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