I have to parse a String that can assume hex values or other non-hex values

0xff, 0x31 or A, PC, label, and so on.

I use this code to divide the two cases:

String input = readInput();

try {
    int hex = Integer.decode(input);            
    // use hex ...

} catch (NumberFormatException e) {
   // input is not a hex, continue parsing
}

Can this code be considered "ugly" or difficult to read? Are there other (maybe more elegant) solutions?

EDIT : I want to clarify that (in my case) a wrong input doesn't exist: i just need to distinguish if it is a hex number, or not. And just for completeness, i'm making a simple assebler for DCPU-16.