Here you can find the source of randomString(int length)
| Parameter | Description |
|---|---|
| length | the required length of the String returned |
public static String randomString(int length)
//package com.java2s; /*//from w w w .j a v a 2 s.c o m * $Source$ * $Revision$ * * Copyright (C) 2000 William Chesters * * Part of Melati (http://melati.org), a framework for the rapid * development of clean, maintainable web applications. * * Melati is free software; Permission is granted to copy, distribute * and/or modify this software under the terms either: * * a) the GNU General Public License as published by the Free Software * Foundation; either version 2 of the License, or (at your option) * any later version, * * or * * b) any version of the Melati Software License, as published * at http://melati.org * * You should have received a copy of the GNU General Public License and * the Melati Software License along with this program; * if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the * GNU General Public License and visit http://melati.org to obtain the * Melati Software License. * * Feel free to contact the Developers of Melati (http://melati.org), * if you would like to work out a different arrangement than the options * outlined here. It is our intention to allow Melati to be used by as * wide an audience as possible. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Contact details for copyright holder: * * William Chesters <williamc At paneris.org> * http://paneris.org/~williamc * Obrechtstraat 114, 2517VX Den Haag, The Netherlands */ public class Main { private static String allowableChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz0123456789"; /** * Generate a random String. * * @param length the required length of the String returned * @return a random String of upper and lowercase letters and digits */ public static String randomString(int length) { String result = ""; int j = allowableChars.length(); for (int a = 0; a < length; a++) { int index = new Double(Math.random() * j).intValue(); result += allowableChars.charAt(index); } return result; } }