Hi friends

if its not an exciting question Sorry! it's a doubt for me
Assume i have a function, and i calculate some value of say "yyy"(variable). while calculating if i get value of yyy=-1000 i.e in negetive value. I have to raise the exception that" invalid value" and my programm should continue.
this is just like, if i got wrong array index, if i put try cacth of ArrayIndexoutofBounds exception, my program should continue without halting.

How to write throwing exception and continue functionality for my program (variable yyy.) . please Give ana example????
it's really urgent for me..

Thans
Sona