Java: How to get random number with N digits
By: Slav Kurochkin
In my current project I need to generate SSN which contains 9 digits, here is how to do it:
public static String generateRandom(int length) {
Random random = new Random();
char[] digits = new char[length];
digits[0] = (char) (random.nextInt(9) + '1');
for (int i = 1; i < length; i++) {
digits[i] = (char) (random.nextInt(10) + '0');
}
return new String(digits);
}
And then just call method with number of digits you wish to get:
generateRandom(9)