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 ps.print(java_runtime_name + " (build " + java_runtime_version);
102
103 if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) {
104 // embedded builds report headless state
105 ps.print(", headless");
106 }
107 ps.println(')');
108
109 /* Third line: JVM information. */
110 String java_vm_name = System.getProperty("java.vm.name");
111 String java_vm_version = System.getProperty("java.vm.version");
112 String java_vm_info = System.getProperty("java.vm.info");
113 ps.println(java_vm_name + " (build " + java_vm_version + ", " +
114 java_vm_info + ")");
115 }
116
117
118 /**
119 * Returns the major version of the running JVM if it's 1.6 or newer
120 * or any RE VM build. It will return 0 if it's an internal 1.5 or
121 * 1.4.x build.
122 *
123 * @since 1.6
124 */
125 public static synchronized int jvmMajorVersion() {
126 if (!versionsInitialized) {
127 initVersions();
128 }
129 return jvm_major_version;
130 }
131
132 /**
133 * Returns the minor version of the running JVM if it's 1.6 or newer
134 * or any RE VM build. It will return 0 if it's an internal 1.5 or
135 * 1.4.x build.
136 * @since 1.6
137 */
138 public static synchronized int jvmMinorVersion() {
139 if (!versionsInitialized) {
140 initVersions();
141 }
142 return jvm_minor_version;
143 }
144
145
146 /**
147 * Returns the security version of the running JVM
148 * @since 1.6
149 */
150 public static synchronized int jvmSecurityVersion() {
151 if (!versionsInitialized) {
152 initVersions();
153 }
154 return jvm_security_version;
155 }
156
157 /**
158 * Returns the patch release version of the running JVM
159 * @since JDK9
160 */
161 public static synchronized int jvmPatchVersion() {
162 if (!versionsInitialized) {
163 initVersions();
164 }
165 return jvm_patch_version;
166 }
167
168 /**
169 * Returns the build number of the running JVM
170 * @since 1.6
171 */
172 public static synchronized int jvmBuildNumber() {
173 if (!versionsInitialized) {
174 initVersions();
175 }
176 return jvm_build_number;
177 }
178
179 /**
180 * Returns the major version of the running JDK.
181 *
182 * @since 1.6
183 */
184 public static synchronized int jdkMajorVersion() {
185 if (!versionsInitialized) {
186 initVersions();
187 }
188 return jdk_major_version;
189 }
190
191 /**
192 * Returns the minor version of the running JDK.
193 * @since 1.6
194 */
195 public static synchronized int jdkMinorVersion() {
196 if (!versionsInitialized) {
197 initVersions();
198 }
199 return jdk_minor_version;
200 }
201
202 /**
203 * Returns the security version of the running JDK.
204 * @since 1.6
205 */
206 public static synchronized int jdkSecurityVersion() {
207 if (!versionsInitialized) {
208 initVersions();
209 }
210 return jdk_security_version;
211 }
212
213 /**
214 * Returns the patch release version of the running JDK
215 * @since JDK9
216 */
217 public static synchronized int jdkPatchVersion() {
218 if (!versionsInitialized) {
219 initVersions();
220 }
221 return jdk_patch_version;
222 }
223
224 /**
225 * Returns the build number of the running JDK
226 * @since 1.6
227 */
228 public static synchronized int jdkBuildNumber() {
229 if (!versionsInitialized) {
230 initVersions();
231 }
232 return jdk_build_number;
233 }
234
235 private static synchronized void initVersions() {
236 if (versionsInitialized) {
237 return;
238 }
239 if (!getJvmVersionInfo()) {
240 throw new RuntimeException("Unable to obtain JVM version info");
241 }
242 getJdkVersionInfo();
243 versionsInitialized = true;
244 }
245
246 // Gets the JVM version info if available and sets the jvm_*_version fields
247 // and its capabilities.
248 private static native boolean getJvmVersionInfo();
249 private static native void getJdkVersionInfo();
250 }
251
252 // Help Emacs a little because this file doesn't end in .java.
253 //
254 // Local Variables: ***
255 // mode: java ***
256 // End: ***