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_update_version = 0;
59 private static int jvm_build_number = 0;
60 private static String jvm_special_version = null;
61 private static int jdk_major_version = 0;
62 private static int jdk_minor_version = 0;
63 private static int jdk_security_version = 0;
64 private static int jdk_update_version = 0;
65 private static int jdk_build_number = 0;
66 private static String jdk_special_version = null;
67
68 /**
69 * In case you were wondering this method is called by java -version.
70 * Sad that it prints to stderr; would be nicer if default printed on
71 * stdout.
72 */
73 public static void print() {
74 print(System.err);
75 }
76
77 /**
78 * This is the same as print except that it adds an extra line-feed
79 * at the end, typically used by the -showversion in the launcher
80 */
81 public static void println() {
82 print(System.err);
83 System.err.println();
84 }
85
86 /**
129 initVersions();
130 }
131 return jvm_major_version;
132 }
133
134 /**
135 * Returns the minor version of the running JVM if it's 1.6 or newer
136 * or any RE VM build. It will return 0 if it's an internal 1.5 or
137 * 1.4.x build.
138 * @since 1.6
139 */
140 public static synchronized int jvmMinorVersion() {
141 if (!versionsInitialized) {
142 initVersions();
143 }
144 return jvm_minor_version;
145 }
146
147
148 /**
149 * Returns the security version of the running JVM if it's 1.6 or newer
150 * or any RE VM build. It will return 0 if it's an internal 1.5 or
151 * 1.4.x build.
152 * @since 1.6
153 */
154 public static synchronized int jvmSecurityVersion() {
155 if (!versionsInitialized) {
156 initVersions();
157 }
158 return jvm_security_version;
159 }
160
161 /**
162 * Returns the update release version of the running JVM if it's
163 * a RE build. It will return 0 if it's an internal build.
164 * @since 1.6
165 */
166 public static synchronized int jvmUpdateVersion() {
167 if (!versionsInitialized) {
168 initVersions();
169 }
170 return jvm_update_version;
171 }
172
173 public static synchronized String jvmSpecialVersion() {
174 if (!versionsInitialized) {
175 initVersions();
176 }
177 if (jvm_special_version == null) {
178 jvm_special_version = getJvmSpecialVersion();
179 }
180 return jvm_special_version;
181 }
182 public static native String getJvmSpecialVersion();
183
184 /**
185 * Returns the build number of the running JVM if it's a RE build
186 * It will return 0 if it's an internal build.
187 * @since 1.6
188 */
189 public static synchronized int jvmBuildNumber() {
190 if (!versionsInitialized) {
191 initVersions();
192 }
193 return jvm_build_number;
194 }
195
196 /**
197 * Returns the major version of the running JDK.
198 *
199 * @since 1.6
200 */
201 public static synchronized int jdkMajorVersion() {
202 if (!versionsInitialized) {
203 initVersions();
204 }
205 return jdk_major_version;
206 }
211 */
212 public static synchronized int jdkMinorVersion() {
213 if (!versionsInitialized) {
214 initVersions();
215 }
216 return jdk_minor_version;
217 }
218
219 /**
220 * Returns the security version of the running JDK.
221 * @since 1.6
222 */
223 public static synchronized int jdkSecurityVersion() {
224 if (!versionsInitialized) {
225 initVersions();
226 }
227 return jdk_security_version;
228 }
229
230 /**
231 * Returns the update release version of the running JDK if it's
232 * a RE build. It will return 0 if it's an internal build.
233 * @since 1.6
234 */
235 public static synchronized int jdkUpdateVersion() {
236 if (!versionsInitialized) {
237 initVersions();
238 }
239 return jdk_update_version;
240 }
241
242 public static synchronized String jdkSpecialVersion() {
243 if (!versionsInitialized) {
244 initVersions();
245 }
246 if (jdk_special_version == null) {
247 jdk_special_version = getJdkSpecialVersion();
248 }
249 return jdk_special_version;
250 }
251 public static native String getJdkSpecialVersion();
252
253 /**
254 * Returns the build number of the running JDK if it's a RE build
255 * It will return 0 if it's an internal build.
256 * @since 1.6
257 */
258 public static synchronized int jdkBuildNumber() {
259 if (!versionsInitialized) {
260 initVersions();
261 }
262 return jdk_build_number;
263 }
264
265 // true if JVM exports the version info including the capabilities
266 private static boolean jvmVersionInfoAvailable;
267 private static synchronized void initVersions() {
268 if (versionsInitialized) {
269 return;
270 }
271 jvmVersionInfoAvailable = getJvmVersionInfo();
272 if (!jvmVersionInfoAvailable) {
273 // parse java.vm.version for older JVM before the
274 // new JVM_GetVersionInfo is added.
275 // valid format of the version string is:
276 // n.n.n[_uu[c]][-<identifer>]-bxx
277 CharSequence cs = System.getProperty("java.vm.version");
278 if (cs.length() >= 5 &&
279 Character.isDigit(cs.charAt(0)) && cs.charAt(1) == '.' &&
280 Character.isDigit(cs.charAt(2)) && cs.charAt(3) == '.' &&
281 Character.isDigit(cs.charAt(4))) {
282 jvm_major_version = Character.digit(cs.charAt(0), 10);
283 jvm_minor_version = Character.digit(cs.charAt(2), 10);
284 jvm_security_version = Character.digit(cs.charAt(4), 10);
285 cs = cs.subSequence(5, cs.length());
286 if (cs.charAt(0) == '_' && cs.length() >= 3 &&
287 Character.isDigit(cs.charAt(1)) &&
288 Character.isDigit(cs.charAt(2))) {
289 int nextChar = 3;
290 try {
291 String uu = cs.subSequence(1, 3).toString();
292 jvm_update_version = Integer.valueOf(uu).intValue();
293 if (cs.length() >= 4) {
294 char c = cs.charAt(3);
295 if (c >= 'a' && c <= 'z') {
296 jvm_special_version = Character.toString(c);
297 nextChar++;
298 }
299 }
300 } catch (NumberFormatException e) {
301 // not conforming to the naming convention
302 return;
303 }
304 cs = cs.subSequence(nextChar, cs.length());
305 }
306 if (cs.charAt(0) == '-') {
307 // skip the first character
308 // valid format: <identifier>-bxx or bxx
309 // non-product VM will have -debug|-release appended
310 cs = cs.subSequence(1, cs.length());
311 String[] res = cs.toString().split("-");
312 for (String s : res) {
313 if (s.charAt(0) == 'b' && s.length() == 3 &&
314 Character.isDigit(s.charAt(1)) &&
315 Character.isDigit(s.charAt(2))) {
316 jvm_build_number =
317 Integer.valueOf(s.substring(1, 3)).intValue();
318 break;
319 }
320 }
321 }
322 }
323 }
324 getJdkVersionInfo();
325 versionsInitialized = true;
326 }
327
328 // Gets the JVM version info if available and sets the jvm_*_version fields
329 // and its capabilities.
330 //
331 // Return false if not available which implies an old VM (Tiger or before).
332 private static native boolean getJvmVersionInfo();
333 private static native void getJdkVersionInfo();
334 }
335
336 // Help Emacs a little because this file doesn't end in .java.
337 //
338 // Local Variables: ***
339 // mode: java ***
340 // End: ***
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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 /**
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 }
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: ***
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