1 /*

     2  * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.misc;

    27 import java.io.PrintStream;

    28 

    29 public class Version {

    30 

    31 

    32     private static final String launcher_name =

    33         "@@LAUNCHER_NAME@@";

    34 

    35     private static final String java_version =

    36         "@@VERSION_SHORT@@";

    37 

    38     private static final String java_runtime_name =

    39         "@@RUNTIME_NAME@@";

    40 

    41     private static final String java_runtime_version =

    42         "@@VERSION_STRING@@";

    43 

    44     static {

    45         init();

    46     }

    47 

    48     public static void init() {

    49         System.setProperty("java.version", java_version);

    50         System.setProperty("java.runtime.version", java_runtime_version);

    51         System.setProperty("java.runtime.name", java_runtime_name);

    52     }

    53 

    54     private static boolean versionsInitialized = false;

    55     private static int jvm_major_version = 0;

    56     private static int jvm_minor_version = 0;

    57     private static int jvm_security_version = 0;

    58     private static int jvm_patch_version = 0;

    59     private static int jvm_build_number = 0;

    60     private static int jdk_major_version = 0;

    61     private static int jdk_minor_version = 0;

    62     private static int jdk_security_version = 0;

    63     private static int jdk_patch_version = 0;

    64     private static int jdk_build_number = 0;

    65 

    66     /**

    67      * In case you were wondering this method is called by java -version.

    68      * Sad that it prints to stderr; would be nicer if default printed on

    69      * stdout.

    70      */

    71     public static void print() {

    72         print(System.err);

    73     }

    74 

    75     /**

    76      * This is the same as print except that it adds an extra line-feed

    77      * at the end, typically used by the -showversion in the launcher

    78      */

    79     public static void println() {

    80         print(System.err);

    81         System.err.println();

    82     }

    83 

    84     /**

    85      * Give a stream, it will print version info on it.

    86      */

    87     public static void print(PrintStream ps) {

    88         boolean isHeadless = false;

    89 

    90         /* Report that we're running headless if the property is true */

    91         String headless = System.getProperty("java.awt.headless");

    92         if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) {

    93             isHeadless = true;

    94         }

    95 

    96         /* First line: platform version. */

    97         ps.println(launcher_name + " version \"" + java_version + "\"");

    98 

    99         /* Second line: runtime version (ie, libraries). */

   100 

   101         String jdk_debug_level = System.getProperty("jdk.debug", "release");

   102         /* Debug level is not printed for "release" builds */

   103         if ("release".equals(jdk_debug_level)) {

   104             jdk_debug_level = "";

   105         } else {

   106             jdk_debug_level = jdk_debug_level + " ";

   107         }

   108 

   109         ps.print(java_runtime_name + " (" + jdk_debug_level + "build " + java_runtime_version);

   110 

   111         if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) {

   112             // embedded builds report headless state

   113             ps.print(", headless");

   114         }

   115         ps.println(')');

   116 

   117         /* Third line: JVM information. */

   118         String java_vm_name    = System.getProperty("java.vm.name");

   119         String java_vm_version = System.getProperty("java.vm.version");

   120         String java_vm_info    = System.getProperty("java.vm.info");

   121         ps.println(java_vm_name + " (" + jdk_debug_level + "build " + java_vm_version + ", " +

   122                    java_vm_info + ")");

   123     }

   124 

   125 

   126     /**

   127      * Returns the major version of the running JVM.

   128      * @return the major version of the running JVM

   129      * @since 1.6

   130      */

   131     public static synchronized int jvmMajorVersion() {

   132         if (!versionsInitialized) {

   133             initVersions();

   134         }

   135         return jvm_major_version;

   136     }

   137 

   138     /**

   139      * Returns the minor version of the running JVM.

   140      * @return the minor version of the running JVM

   141      * @since 1.6

   142      */

   143     public static synchronized int jvmMinorVersion() {

   144         if (!versionsInitialized) {

   145             initVersions();

   146         }

   147         return jvm_minor_version;

   148     }

   149 

   150 

   151     /**

   152      * Returns the security version of the running JVM.

   153      * @return the security version of the running JVM

   154      * @since 9

   155      */

   156     public static synchronized int jvmSecurityVersion() {

   157         if (!versionsInitialized) {

   158             initVersions();

   159         }

   160         return jvm_security_version;

   161     }

   162 

   163     /**

   164      * Returns the patch release version of the running JVM.

   165      * @return the patch release version of the running JVM

   166      * @since 9

   167      */

   168     public static synchronized int jvmPatchVersion() {

   169         if (!versionsInitialized) {

   170             initVersions();

   171         }

   172         return jvm_patch_version;

   173     }

   174 

   175     /**

   176      * Returns the build number of the running JVM.

   177      * @return the build number of the running JVM

   178      * @since 1.6

   179      */

   180     public static synchronized int jvmBuildNumber() {

   181         if (!versionsInitialized) {

   182             initVersions();

   183         }

   184         return jvm_build_number;

   185     }

   186 

   187     /**

   188      * Returns the major version of the running JDK.

   189      * @return the major version of the running JDK

   190      * @since 1.6

   191      */

   192     public static synchronized int jdkMajorVersion() {

   193         if (!versionsInitialized) {

   194             initVersions();

   195         }

   196         return jdk_major_version;

   197     }

   198 

   199     /**

   200      * Returns the minor version of the running JDK.

   201      * @return the minor version of the running JDK

   202      * @since 1.6

   203      */

   204     public static synchronized int jdkMinorVersion() {

   205         if (!versionsInitialized) {

   206             initVersions();

   207         }

   208         return jdk_minor_version;

   209     }

   210 

   211     /**

   212      * Returns the security version of the running JDK.

   213      * @return the security version of the running JDK

   214      * @since 9

   215      */

   216     public static synchronized int jdkSecurityVersion() {

   217         if (!versionsInitialized) {

   218             initVersions();

   219         }

   220         return jdk_security_version;

   221     }

   222 

   223     /**

   224      * Returns the patch release version of the running JDK.

   225      * @return the patch release version of the running JDK

   226      * @since 9

   227      */

   228     public static synchronized int jdkPatchVersion() {

   229         if (!versionsInitialized) {

   230             initVersions();

   231         }

   232         return jdk_patch_version;

   233     }

   234 

   235     /**

   236      * Returns the build number of the running JDK.

   237      * @return the build number of the running JDK

   238      * @since 1.6

   239      */

   240     public static synchronized int jdkBuildNumber() {

   241         if (!versionsInitialized) {

   242             initVersions();

   243         }

   244         return jdk_build_number;

   245     }

   246 

   247     private static synchronized void initVersions() {

   248         if (versionsInitialized) {

   249             return;

   250         }

   251         if (!getJvmVersionInfo()) {

   252             throw new InternalError("Unable to obtain JVM version info");

   253         }

   254         getJdkVersionInfo();

   255         versionsInitialized = true;

   256     }

   257 

   258     // Gets the JVM version info if available and sets the jvm_*_version fields

   259     // and its capabilities.

   260     private static native boolean getJvmVersionInfo();

   261     private static native void getJdkVersionInfo();

   262 }

   263 

   264 // Help Emacs a little because this file doesn't end in .java.

   265 //

   266 // Local Variables: ***

   267 // mode: java ***

   268 // End: ***