Here you can find the source of is64Bit()
public static boolean is64Bit()
//package com.java2s; /*/*from ww w . j a va 2 s . c o m*/ * Copyright 2013 BIG TU Wien. * * 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. */ public class Main { private static String OS = System.getProperty("os.name").toLowerCase(); public static boolean is64Bit() { if (isWindows()) { return (System.getenv("ProgramFiles(x86)") != null); } else { return (System.getProperty("os.arch").indexOf("64") != -1); } } public static boolean isWindows() { return OS.indexOf("win") >= 0; } }