RE: compare to a blank

[Bill Brosch <bbrosch@xxxxxxxxxxx>]

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Be careful here, because the length of the string is dependent upon the
number of blanks.  Also, a 2 blank string is different from a 1 blank
string.  

If your checking the length looking for an empty string, always use
trim().
If using equal, the strings are not equal if the lengths are different,
even if one just has spaces appended.


Bill Brosch
Swift Technologies

e-mail: bbrosch@stecnet.com
web site:       http://www.stecnet.com
phone:  1-847-289-8339
fax:            1-847-289-8939

- -----Original Message-----
From: Timothy Sullivan [mailto:TSullivan@computer-guidance.com]
Sent: Thursday, June 22, 2000 04:44 PM
To: JAVA400-L@midrange.com
Subject: RE: compare to a blank


 Hello,


You may also want to consider the following since it is just as readable
and
_faster_ than the equals() method.  With length(), you won't make a hard
to
see mistake like using " " instead of "".  These bugs can be very hard
to
see in some editors and on printouts.  Also, it will in help get rid of
some
of those oops "I used '==' instead of the equals()" bug.

        if (field.length() == 0)
        {
        }
        else
        {
        }

- -or-

        if (field.trim().length() == 0)
        {
        }
        else
        {
        }

/Tim


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