[6266] in java-interest
Re: How to check for null ....
daemon@ATHENA.MIT.EDU (Lee Collins)
Wed Mar 27 01:34:44 1996
Date: Tue, 19 Mar 1996 13:57:00 -0600
Reply-To: Java Interest <JAVA-INTEREST@JAVASOFT.COM>
From: Lee Collins <spacely@XSITE.NET>
To: Multiple recipients of list JAVA-INTEREST
<JAVA-INTEREST@JAVASOFT.COM>
In Java, it goes like this:
String s;
s = "Hello World";
// NOW there is something in the string
if (s == null)
System.out.println("\n string is null");
else
System.out.println("\n string is not null"); // this one
s = null;
// NOW its NOT
if (s == null)
System.out.println("\n string is null"); // this one
else
System.out.println("\n string is not null");
At 07:17 PM 3/18/96 +1100, 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
>=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
>
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