Checking if variable is null

[jorgepinho]

Hi All

I have this code

var1 = request.getParameter("id");

but sometimes there is no "id" (and that´s ok), but it returns "null".

How do I check if var1 is null ?

if var1 == null don´t work

thankx

[Fantik]

use code blocks and actually paste in what you have, I don't know how to help you.

[MasterOfSouls]

What you have to do is use the compareTo function. It will compare the text that is stored in a string to a different value. This is how to check if it has nothing in it:

if (var1.compareTo("") == 0) {
//Var1 is null
}

Hope this helps, if you have any more questions just post.