[Oktam]

I'm new to java and got an exception problem...if an exception occurs in my programme i must print the output "can't execute", but with using a new exception: throw new IllegalArgumentException();

Code:

try{
...
..
}
catch(NumberFormatException e) {
	throw new IllegalArgumentException();
}

Where and how do i have to define this IllegalArgumentException so that it can print a certain message??