Check Incorrect date?

Hi, I've got written this code with some help of Sun's tutorial. But I still cannot find out why this program doesn't throw any exception when I try to enter an invalid date. What can I change so that 30/2/2004 (February 30th 2004) is incorrect?

public class Testje {

public static void main(String[] args){

Date trythis = new Date();

String test = args[0];

System.out.println("Print of the test string: " +test);

SimpleDateFormat formatter= new SimpleDateFormat ("dd/MM/yyyy");

try {

trythis = formatter.parse(test);

} catch (ParseException e) {

System.out.println("Wrong date");

e.printStackTrace();

}

String dateOut;

dateOut = formatter.format(trythis);

System.out.println(dateOut);

}

}

Thank you

[824 byte] By [ Flokky] at [2007-9-30 9:05:40]