Randomize the Numbers 1…N

/* Write a program that enters in integer n and prints the numbers 1, 2, …, n in random order.
 * You might need to use arrays */

import java.util.Random;
import java.util.Scanner;

public class _12_RandomizeTheNumbers1toN {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter a whole positive number, bigger from 1, for N: ");
        int numN = scan.nextInt();
        scan.close();

        if (numN > 1) {
            boolean[] randomNums = new boolean[numN + 1];
            randomNums[0] = true;
            Random generator = new Random();
            for (int i = 1; i < randomNums.length; i++) {
                int random = 1 + generator.nextInt(numN);
                if (randomNums[random]) {
                    i--;
                } else {
                    randomNums[random] = true;
                    System.out.print(random);
                    if (i < randomNums.length - 1) {
                        System.out.print(" ");
                    }
                }
            }

        } else {
            System.out.println("Error! - Invalid Input number!!!");
        }
    }

}