Here you can find the source of is32bitJVM()
static boolean is32bitJVM()
//package com.java2s; /*//from w ww. ja va 2 s.co m * Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved. * * 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 { static boolean is32bitJVM() { // sun.arch.data.model is available on Oracle, Zing and (most probably) IBM JVMs String architecture = System.getProperty("sun.arch.data.model"); return architecture != null && architecture.equals("32"); } }