[6082] in java-interest
Re: How to check for null ....
daemon@ATHENA.MIT.EDU (Heather Swayne)
Tue Mar 19 00:46:35 1996
Date: Mon, 18 Mar 1996 14:08:42 PST
Reply-To: Java Interest <JAVA-INTEREST@JAVASOFT.COM>
From: Heather Swayne <hswayne@WRC.XEROX.COM>
To: Multiple recipients of list JAVA-INTEREST
<JAVA-INTEREST@JAVASOFT.COM>
hi Dhaval and welcome to Java :)
try:
if (mystring != null)
System.out.println("sting is not null");
else System.out.println("String is null!!!");
happy java,
Heather
Dhaval M Shah wrote:
>
> To: java-interest@java.sun.com
> Cc: owner-java-interest@java.sun.com
>
> Hello Everybody,
>
> I am a student with good 'C' background and trying to learn
> java.
>
> I have created a string that depending upon input either has some characters or
> has "null" in it. [Or rather the string is null]
>
> My problem is how to check for nullity in java. If the string has "null" and
> I use mystring.length() in the hope that it should return 0, java throws
> a runtime exception.
>
> When I say System.out.println(mystring); it prints null.
>
> In 'C', I could have done something like this :
>
> if(mystring) /* Just a crude example */
> printf("\n string is not null);
> else
> printf("string is null");
>
> Is there any method (or) a specific way to check for strings with null in it.
>
> Thanks
>
> Dhaval
>
> --
> =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
> Dhaval M. Shah
> dhaval@cs.uow.edu.au (Home) : +61 42 258519
> Dept. of Computer Science
> University of Wollongong 2/13 Catherine St., Gwynneville,
> NSW 2522 Australia NSW 2500 Australia
> =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
