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| 1 | +/* | |
| 2 | + * Copyright (c) 1999, 2011, 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 | + "@@java_version@@"; | |
| 37 | + | |
| 38 | + private static final String java_runtime_name = | |
| 39 | + "@@java_runtime_name@@"; | |
| 40 | + | |
| 41 | + private static final String java_runtime_version = | |
| 42 | + "@@java_runtime_version@@"; | |
| 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_micro_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_micro_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 | + /** | |
| 87 | + * Give a stream, it will print version info on it. | |
| 88 | + */ | |
| 89 | + public static void print(PrintStream ps) { | |
| 90 | + boolean isHeadless = false; | |
| 91 | + | |
| 92 | + /* Report that we're running headless if the property is true */ | |
| 93 | + String headless = System.getProperty("java.awt.headless"); | |
| 94 | + if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) { | |
| 95 | + isHeadless = true; | |
| 96 | + } | |
| 97 | + | |
| 98 | + /* First line: platform version. */ | |
| 99 | + ps.println(launcher_name + " version \"" + java_version + "\""); | |
| 100 | + | |
| 101 | + /* Second line: runtime version (ie, libraries). */ | |
| 102 | + | |
| 103 | + ps.print(java_runtime_name + " (build " + java_runtime_version); | |
| 104 | + | |
| 105 | + if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) { | |
| 106 | + // embedded builds report headless state | |
| 107 | + ps.print(", headless"); | |
| 108 | + } | |
| 109 | + ps.println(')'); | |
| 110 | + | |
| 111 | + /* Third line: JVM information. */ | |
| 112 | + String java_vm_name = System.getProperty("java.vm.name"); | |
| 113 | + String java_vm_version = System.getProperty("java.vm.version"); | |
| 114 | + String java_vm_info = System.getProperty("java.vm.info"); | |
| 115 | + ps.println(java_vm_name + " (build " + java_vm_version + ", " + | |
| 116 | + java_vm_info + ")"); | |
| 117 | + } | |
| 118 | + | |
| 119 | + | |
| 120 | + /** | |
| 121 | + * Returns the major version of the running JVM if it's 1.6 or newer | |
| 122 | + * or any RE VM build. It will return 0 if it's an internal 1.5 or | |
| 123 | + * 1.4.x build. | |
| 124 | + * | |
| 125 | + * @since 1.6 | |
| 126 | + */ | |
| 127 | + public static synchronized int jvmMajorVersion() { | |
| 128 | + if (!versionsInitialized) { | |
| 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 micro 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 jvmMicroVersion() { | |
| 155 | + if (!versionsInitialized) { | |
| 156 | + initVersions(); | |
| 157 | + } | |
| 158 | + return jvm_micro_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 | + } | |
| 207 | + | |
| 208 | + /** | |
| 209 | + * Returns the minor version of the running JDK. | |
| 210 | + * @since 1.6 | |
| 211 | + */ | |
| 212 | + public static synchronized int jdkMinorVersion() { | |
| 213 | + if (!versionsInitialized) { | |
| 214 | + initVersions(); | |
| 215 | + } | |
| 216 | + return jdk_minor_version; | |
| 217 | + } | |
| 218 | + | |
| 219 | + /** | |
| 220 | + * Returns the micro version of the running JDK. | |
| 221 | + * @since 1.6 | |
| 222 | + */ | |
| 223 | + public static synchronized int jdkMicroVersion() { | |
| 224 | + if (!versionsInitialized) { | |
| 225 | + initVersions(); | |
| 226 | + } | |
| 227 | + return jdk_micro_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_micro_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 | +} | |