Here you can find the source of getRandomIntStr(int len)
private static int getRandomIntStr(int len)
//package com.java2s; /*/*from w ww. j a v a2s .c o m*/ * Copyright (c) 2011-2013 GoPivotal, Inc. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, * either express or implied. See the License for the specific language governing permissions and limitations under the * License. */ import java.util.Random; public class Main { private static int getRandomIntStr(int len) { if (len == 0) { len = 1; } Random random = new Random(System.nanoTime()); return random.nextInt((10 ^ len) - 1); } }