Here you can find the source of is64Bit()
public static boolean is64Bit()
//package com.java2s; /*/*from w w w . j a v a2 s . c om*/ * Copyright (c) 1998-2015 Caucho Technology -- all rights reserved * * This file is part of Baratine(TM)(TM) * * Each copy or derived work must preserve the copyright notice and this * notice unmodified. * * Baratine 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 2 of the License, or * (at your option) any later version. * * Baratine 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, or any warranty * of NON-INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with Baratine; if not, write to the * * Free Software Foundation, Inc. * 59 Temple Place, Suite 330 * Boston, MA 02111-1307 USA * * @author Scott Ferguson */ public class Main { private static String[] PROPERTIES_64 = { "sun.arch.data.model", "com.ibm.vm.bitmodel", "os.arch" }; /** * @return */ public static boolean is64Bit() { for (String prop : PROPERTIES_64) { String value = System.getProperty(prop); if (value != null && value.indexOf("64") >= 0) { return true; } } return false; } }