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BEGIN LICENSE BLOCK ***** Version: EPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Eclipse Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Copyright (C) 2008 JRuby project Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the EPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the EPL, the GPL or the LGPL. END LICENSE BLOCK ***
 package org.jruby.platform;
 import java.util.Map;
Platform specific constants.
 public class Platform {
     private static final Platform INSTANCE = new Platform();
     public static Platform getPlatform() {
         return ;
     protected Platform() {
     public static void main(String[] args) {
     public String getPackageName() {
         return String.format("%s.%s.%s"Platform.class.getPackage().getName(), );
     public String getOSPackageName() {
         return String.format("%s.%s"Platform.class.getPackage().getName(), );
     private static final String DARWIN = "darwin";
     private static final String WINDOWS = "windows";
     private static final String LINUX = "linux";
     private static final String FREEBSD = "freebsd";
     private static final String OPENBSD = "openbsd";
     private static final String SOLARIS = "solaris";
     private static final String OPENVMS = "openvms";
     private static final String GCJ = "GNU libgcj";
     private static final String IBM = "IBM J9 VM";
     public static final Map<StringStringOS_NAMES ="Mac OS X");
     public static final Map<StringStringARCH_NAMES ="x86""i386");
     private static String initOperatingSystem() {
         String osname = getProperty("""unknown").toLowerCase();
         for (String s : .keySet()) {
             if (s.equalsIgnoreCase(osname)) {
                 return .get(s);
         if (osname.startsWith("windows")) {
             return ;
         return osname;
     private static String initArchitecture() {
         String arch = getProperty("os.arch""unknown").toLowerCase();
         for (String s : .keySet()) {
             if (s.equalsIgnoreCase(arch)) {
                 return .get(s);
         if ("universal".equals(arch)) {
             // OS X OpenJDK7 builds report "universal" right now
             String bits = SafePropertyAccessor.getProperty("");
             if ("32".equals(bits)) {
                 arch = "i386";
             } else if ("64".equals(bits)) {
                arch = "x86_64";
        return arch;
    public static final String ARCH = initArchitecture();
    public static final String OS = initOperatingSystem();
    public static final String JVM = getProperty("""unknown");
    public static final boolean IS_WINDOWS = .equals();
    public static final boolean IS_MAC = .equals();
    public static final boolean IS_FREEBSD = .equals();
    public static final boolean IS_OPENBSD = .equals();
    public static final boolean IS_LINUX = .equals();
    public static final boolean IS_SOLARIS = .equals();
    public static final boolean IS_BSD =  ||  || ;
    public static final boolean IS_OPENVMS = .equals();
    public static final String NAME = String.format("%s-%s");
    public static final int BIG_ENDIAN = 4321;
    public static final int LITTLE_ENDIAN = 1234;
    public static final int BYTE_ORDER = ByteOrder.nativeOrder().equals(.) ?  : ;
    public static final boolean IS_GCJ = .equals();
    public static final boolean IS_IBM = .equals();
An extension over System.getProperty method. Handles security restrictions, and returns the default value if the access to the property is restricted.

property The system property name.
defValue The default value.
The value of the system property, or the default value.
    public static String getProperty(String propertyString defValue) {
        try {
            return System.getProperty(propertydefValue);
        } catch (SecurityException se) {
            return defValue;
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