/* * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.awt; import java.security.PrivilegedAction;import java.util.HashMap;import java.util.Map; import static sun.awt.OSInfo.OSType.*; /** * @author Pavel Porvatov */public class OSInfo {    public static enum OSType {        WINDOWS,        LINUX,        SOLARIS,        UNKNOWN    }     /*       The map windowsVersionMap must contain all windows version constants except WINDOWS_UNKNOWN,       and so the method getWindowsVersion() will return the constant for known OS.       It allows compare objects by "==" instead of "equals".     */    public static final WindowsVersion WINDOWS_UNKNOWN = new WindowsVersion(-1, -1);    public static final WindowsVersion WINDOWS_95 = new WindowsVersion(4, 0);    public static final WindowsVersion WINDOWS_98 = new WindowsVersion(4, 10);    public static final WindowsVersion WINDOWS_ME = new WindowsVersion(4, 90);    public static final WindowsVersion WINDOWS_2000 = new WindowsVersion(5, 0);    public static final WindowsVersion WINDOWS_XP = new WindowsVersion(5, 1);    public static final WindowsVersion WINDOWS_2003 = new WindowsVersion(5, 2);    public static final WindowsVersion WINDOWS_VISTA = new WindowsVersion(6, 0);     private static final String OS_NAME = "os.name";    private static final String OS_VERSION = "os.version";     private final static Map<String, WindowsVersion> windowsVersionMap = new HashMap<String, OSInfo.WindowsVersion>();     static {        windowsVersionMap.put(WINDOWS_95.toString(), WINDOWS_95);        windowsVersionMap.put(WINDOWS_98.toString(), WINDOWS_98);        windowsVersionMap.put(WINDOWS_ME.toString(), WINDOWS_ME);        windowsVersionMap.put(WINDOWS_2000.toString(), WINDOWS_2000);        windowsVersionMap.put(WINDOWS_XP.toString(), WINDOWS_XP);        windowsVersionMap.put(WINDOWS_2003.toString(), WINDOWS_2003);        windowsVersionMap.put(WINDOWS_VISTA.toString(), WINDOWS_VISTA);    }     private static final PrivilegedAction<OSType> osTypeAction = new PrivilegedAction<OSType>() {        public OSType run() {            return getOSType();        }    };     private OSInfo() {        // Don't allow to create instances    }     /**     * Returns type of operating system.     */    public static OSType getOSType() throws SecurityException {        String osName = System.getProperty(OS_NAME);         if (osName != null) {            if (osName.contains("Windows")) {                return WINDOWS;            }             if (osName.contains("Linux")) {                return LINUX;            }             if (osName.contains("Solaris") || osName.contains("SunOS")) {                return SOLARIS;            }             // determine another OS here        }         return UNKNOWN;    }     public static PrivilegedAction<OSType> getOSTypeAction() {        return osTypeAction;    }     public static WindowsVersion getWindowsVersion() throws SecurityException {        String osVersion = System.getProperty(OS_VERSION);         if (osVersion == null) {            return WINDOWS_UNKNOWN;        }         synchronized (windowsVersionMap) {            WindowsVersion result = windowsVersionMap.get(osVersion);             if (result == null) {                // Try parse version and put object into windowsVersionMap                String[] arr = osVersion.split("\\.");                 if (arr.length == 2) {                    try {                        result = new WindowsVersion(Integer.parseInt(arr[0]), Integer.parseInt(arr[1]));                    } catch (NumberFormatException e) {                        return WINDOWS_UNKNOWN;                    }                } else {                    return WINDOWS_UNKNOWN;                }                 windowsVersionMap.put(osVersion, result);            }             return result;        }    }     public static class WindowsVersion implements Comparable<WindowsVersion> {        private final int major;         private final int minor;         private WindowsVersion(int major, int minor) {            this.major = major;            this.minor = minor;        }         public int getMajor() {            return major;        }         public int getMinor() {            return minor;        }         public int compareTo(WindowsVersion o) {            int result = major - o.getMajor();             if (result == 0) {                result = minor - o.getMinor();            }             return result;        }         public boolean equals(Object obj) {            return obj instanceof WindowsVersion && compareTo((WindowsVersion) obj) == 0;        }         public int hashCode() {            return 31 * major + minor;        }         public String toString() {            return major + "." + minor;        }    }}