NumberFormatException using line.substring

[Tim Hollis]

I need to check if a particular point in a sting "line" has any value in it or not. I know that the string will be composed of numbers, so
I have tried using :

if (Integer.parseInt(line.substring(43,48).trim()) > 0){

I know that this is an awkward way of doing this, and it doesn't work! If the string is empty by the time I get to this point, I get a NumberformatException error.
Can anyone suggest a way I can check if a substing is not null? This HAS GOT to be simple!?!

[Gyula Klinszky]

Try checking the length of said string !

[Layne Lund]

You should break each function call into its own line. This would help simplify things drastically.
HTH
Layne

[William Barnes]

Ya, what Layne said.