/*
 * Copyright (c) 1997, 2019, 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
/** * @author Pavel Porvatov */
public class OSInfo { public static enum OSType { WINDOWS, LINUX, SOLARIS, MACOSX, AIX, 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); public static final WindowsVersion WINDOWS_7 = new WindowsVersion(6, 1); private static final String OS_NAME = "os.name"; private static final String OS_VERSION = "os.version"; private static final 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); windowsVersionMap.put(WINDOWS_7.toString(), WINDOWS_7); } 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.
/** * 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; } if (osName.contains("OS X")) { return MACOSX; } if (osName.contains("AIX")) { return AIX; } // 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; } } }