/* * Copyright (c) 1999, 2011, 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.misc;import java.io.PrintStream; public class Version {      private static final String launcher_name =        "@@launcher_name@@";     private static final String java_version =        "@@java_version@@";     private static final String java_runtime_name =        "@@java_runtime_name@@";     private static final String java_runtime_version =        "@@java_runtime_version@@";     static {        init();    }     public static void init() {        System.setProperty("java.version", java_version);        System.setProperty("java.runtime.version", java_runtime_version);        System.setProperty("java.runtime.name", java_runtime_name);    }     private static boolean versionsInitialized = false;    private static int jvm_major_version = 0;    private static int jvm_minor_version = 0;    private static int jvm_micro_version = 0;    private static int jvm_update_version = 0;    private static int jvm_build_number = 0;    private static String jvm_special_version = null;    private static int jdk_major_version = 0;    private static int jdk_minor_version = 0;    private static int jdk_micro_version = 0;    private static int jdk_update_version = 0;    private static int jdk_build_number = 0;    private static String jdk_special_version = null;     /**     * In case you were wondering this method is called by java -version.     * Sad that it prints to stderr; would be nicer if default printed on     * stdout.     */    public static void print() {        print(System.err);    }     /**     * This is the same as print except that it adds an extra line-feed     * at the end, typically used by the -showversion in the launcher     */    public static void println() {        print(System.err);        System.err.println();    }     /**     * Give a stream, it will print version info on it.     */    public static void print(PrintStream ps) {        boolean isHeadless = false;         /* Report that we're running headless if the property is true */        String headless = System.getProperty("java.awt.headless");        if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) {            isHeadless = true;        }          /* First line: platform version. */        ps.println(launcher_name + " version \"" + java_version + "\"");         /* Second line: runtime version (ie, libraries). */         ps.print(java_runtime_name + " (build " + java_runtime_version);         if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) {            // embedded builds report headless state            ps.print(", headless");        }        ps.println(')');         /* Third line: JVM information. */        String java_vm_name    = System.getProperty("java.vm.name");        String java_vm_version = System.getProperty("java.vm.version");        String java_vm_info    = System.getProperty("java.vm.info");        ps.println(java_vm_name + " (build " + java_vm_version + ", " +                   java_vm_info + ")");    }      /**     * Returns the major version of the running JVM if it's 1.6 or newer     * or any RE VM build. It will return 0 if it's an internal 1.5 or     * 1.4.x build.     *     * @since 1.6     */    public static synchronized int jvmMajorVersion() {        if (!versionsInitialized) {            initVersions();        }        return jvm_major_version;    }     /**     * Returns the minor version of the running JVM if it's 1.6 or newer     * or any RE VM build. It will return 0 if it's an internal 1.5 or     * 1.4.x build.     * @since 1.6     */    public static synchronized int jvmMinorVersion() {        if (!versionsInitialized) {            initVersions();        }        return jvm_minor_version;    }      /**     * Returns the micro version of the running JVM if it's 1.6 or newer     * or any RE VM build. It will return 0 if it's an internal 1.5 or     * 1.4.x build.     * @since 1.6     */    public static synchronized int jvmMicroVersion() {        if (!versionsInitialized) {            initVersions();        }        return jvm_micro_version;    }     /**     * Returns the update release version of the running JVM if it's     * a RE build. It will return 0 if it's an internal build.     * @since 1.6     */    public static synchronized int jvmUpdateVersion() {        if (!versionsInitialized) {            initVersions();        }        return jvm_update_version;    }     public static synchronized String jvmSpecialVersion() {        if (!versionsInitialized) {            initVersions();        }        if (jvm_special_version == null) {            jvm_special_version = getJvmSpecialVersion();        }        return jvm_special_version;    }    public static native String getJvmSpecialVersion();     /**     * Returns the build number of the running JVM if it's a RE build     * It will return 0 if it's an internal build.     * @since 1.6     */    public static synchronized int jvmBuildNumber() {        if (!versionsInitialized) {            initVersions();        }        return jvm_build_number;    }     /**     * Returns the major version of the running JDK.     *     * @since 1.6     */    public static synchronized int jdkMajorVersion() {        if (!versionsInitialized) {            initVersions();        }        return jdk_major_version;    }     /**     * Returns the minor version of the running JDK.     * @since 1.6     */    public static synchronized int jdkMinorVersion() {        if (!versionsInitialized) {            initVersions();        }        return jdk_minor_version;    }     /**     * Returns the micro version of the running JDK.     * @since 1.6     */    public static synchronized int jdkMicroVersion() {        if (!versionsInitialized) {            initVersions();        }        return jdk_micro_version;    }     /**     * Returns the update release version of the running JDK if it's     * a RE build. It will return 0 if it's an internal build.     * @since 1.6     */    public static synchronized int jdkUpdateVersion() {        if (!versionsInitialized) {            initVersions();        }        return jdk_update_version;    }     public static synchronized String jdkSpecialVersion() {        if (!versionsInitialized) {            initVersions();        }        if (jdk_special_version == null) {            jdk_special_version = getJdkSpecialVersion();        }        return jdk_special_version;    }    public static native String getJdkSpecialVersion();     /**     * Returns the build number of the running JDK if it's a RE build     * It will return 0 if it's an internal build.     * @since 1.6     */    public static synchronized int jdkBuildNumber() {        if (!versionsInitialized) {            initVersions();        }        return jdk_build_number;    }     // true if JVM exports the version info including the capabilities    private static boolean jvmVersionInfoAvailable;    private static synchronized void initVersions() {        if (versionsInitialized) {            return;        }        jvmVersionInfoAvailable = getJvmVersionInfo();        if (!jvmVersionInfoAvailable) {            // parse java.vm.version for older JVM before the            // new JVM_GetVersionInfo is added.            // valid format of the version string is:            // n.n.n[_uu[c]][-<identifer>]-bxx            CharSequence cs = System.getProperty("java.vm.version");            if (cs.length() >= 5 &&                Character.isDigit(cs.charAt(0)) && cs.charAt(1) == '.' &&                Character.isDigit(cs.charAt(2)) && cs.charAt(3) == '.' &&                Character.isDigit(cs.charAt(4))) {                jvm_major_version = Character.digit(cs.charAt(0), 10);                jvm_minor_version = Character.digit(cs.charAt(2), 10);                jvm_micro_version = Character.digit(cs.charAt(4), 10);                cs = cs.subSequence(5, cs.length());                if (cs.charAt(0) == '_' && cs.length() >= 3 &&                    Character.isDigit(cs.charAt(1)) &&                    Character.isDigit(cs.charAt(2))) {                    int nextChar = 3;                    try {                        String uu = cs.subSequence(1, 3).toString();                        jvm_update_version = Integer.valueOf(uu).intValue();                        if (cs.length() >= 4) {                            char c = cs.charAt(3);                            if (c >= 'a' && c <= 'z') {                                jvm_special_version = Character.toString(c);                                nextChar++;                            }                        }                    } catch (NumberFormatException e) {                        // not conforming to the naming convention                        return;                    }                    cs = cs.subSequence(nextChar, cs.length());                }                if (cs.charAt(0) == '-') {                    // skip the first character                    // valid format: <identifier>-bxx or bxx                    // non-product VM will have -debug|-release appended                    cs = cs.subSequence(1, cs.length());                    String[] res = cs.toString().split("-");                    for (String s : res) {                        if (s.charAt(0) == 'b' && s.length() == 3 &&                            Character.isDigit(s.charAt(1)) &&                            Character.isDigit(s.charAt(2))) {                            jvm_build_number =                                Integer.valueOf(s.substring(1, 3)).intValue();                            break;                        }                    }                }            }        }        getJdkVersionInfo();        versionsInitialized = true;    }     // Gets the JVM version info if available and sets the jvm_*_version fields    // and its capabilities.    //    // Return false if not available which implies an old VM (Tiger or before).    private static native boolean getJvmVersionInfo();    private static native void getJdkVersionInfo(); }