// generates and prints out a random credit card number

import java.util.*;

public class RandomCard {

    public static void main(String[] args) {
	System.out.println("random 10-digit card:  " + 
			   generateRandomCard(10));
    }

    public static String generateRandomCard(int num_digits) {
	String card = "";
	Random r = new Random();

	for (int i=0; i<num_digits; i++) {
	    card = card + r.nextInt(10);
	}
	return card;
    }
}