Código para criar numeros randomicos

randomNumbers.java

import java.io.File;
import java.io.FileWriter;
import java.io.BufferedWriter;
import java.io.IOException;
import java.util.Scanner;
import java.util.Random;

public class RndNumbers {
	public static void main (String[] args) throws IOException{
		Scanner scan = new Scanner(System.in);
		Random rndnum = new Random();
		
		System.out.print("Quantos numeros voce deseja? ");
			int n = scan.nextInt();
		System.out.print("Qual o numero maximo? ");
			int s = scan.nextInt();
			
			scan.close();
			
		File file = new File("rndnumbers.txt");
		
		if (!file.exists()) {
			file.createNewFile();
		}
		
		BufferedWriter bw = new BufferedWriter(new FileWriter(file.getAbsoluteFile()));
		
		for (int i = 1; i <= n; i++) {
			Integer num = rndnum.nextInt(s);
			bw.write(num.toString() + " ");
		}
		
		bw.close();
		
		System.out.print("Terminado!");
		
	}
}