Here you can find the source of getRandomInt(final int max)
public static int getRandomInt(final int max)
//package com.java2s; /**/* ww w .ja v a 2 s .com*/ * SPINdle (version 2.2.2) * Copyright (C) 2009-2012 NICTA Ltd. * * This file is part of SPINdle project. * * SPINdle is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * SPINdle 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with SPINdle. If not, see <http://www.gnu.org/licenses/>. * * @author H.-P. Lam (oleklam@gmail.com), National ICT Australia - Queensland Research Laboratory */ import java.util.Random; public class Main { private static Random RANDOM_GENERATOR = new Random( System.currentTimeMillis()); public static int getRandomInt(final int max) { int v = RANDOM_GENERATOR.nextInt(max); return (v < 0) ? v + max : v; } }