Java tutorial
//package com.java2s; import java.util.Random; public class Main { @SuppressWarnings("unused") public static String getRandomNumber(int count) { Random rdm = new Random(System.currentTimeMillis()); String random = ""; for (int i = 0; i < count; i++) { String str = String.valueOf((int) (Math.random() * 10 - 1)); random = random + str; } return random; } }