Here you can find the source of generateRandomString(int length)
public static String generateRandomString(int length)
//package com.java2s; /*//from w w w.j a v a 2 s . c o m * movie-renamer-core * Copyright (C) 2012 Nicolas Magr? * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static String generateRandomString(int length) { String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; int charLength = chars.length(); StringBuilder pass = new StringBuilder(charLength); for (int x = 0; x < length; x++) { int i = (int) (Math.random() * charLength); pass.append(chars.charAt(i)); } return pass.toString(); } }