easy array question

[Alex Hank]

I have some simple code that blows up if the string array is empty. I need an if statement that will not execute the code if the array is empty.


int numDir = 0;

String [] selfiles = request.getParameterValues("selfile");

for(int i = 0; i < selfiles.length; i++){ if(selfiles[i].indexOf(".") == -1 ){numDir++;} }//ELEMENTS WITHOUT "." ARE NOT FOLDERS


I need an if statement that will not run the for loop if the array selfiles is empty.

thanks

Alex

[Ben Souther]

I'm assuming you mean null.
That for loop shouldn't blow up if you have a zero length array.

String [] selfiles = request.getParameterValues("selfile"); 
if(null == selfiles){
    // do something like
    selfiles = new String[0];
}

[ June 21, 2005: Message edited by: Ben Souther ]

[Tim Baker]

A look at the code suggests that it should cope fine when the array is empty, ie a zero sized array.

However I suspect your problem is when the array variable is null. So the check you would want is

 
if (selfiles != null)
{
....
}
 

Someone will also probably tell you this was not the right place to post it, as it has little to do with JSP and is more of a java beginners question.

[Bear Bibeault]

Moved to Java in General(beginner).