1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. Oracle designates this 9 * particular file as subject to the "Classpath" exception as provided 10 * by Oracle in the LICENSE file that accompanied this code. 11 * 12 * This code is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * version 2 for more details (a copy is included in the LICENSE file that 16 * accompanied this code). 17 * 18 * You should have received a copy of the GNU General Public License version 19 * 2 along with this work; if not, write to the Free Software Foundation, 20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 22 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 23 * or visit www.oracle.com if you need additional information or have any 24 * questions. 25 */ 26 27 package sun.misc; 28 import java.io.PrintStream; 29 30 public class Version { 31 // Android-changed : launcher_name, java_version, 32 // java_runtime_name and java_runtime_version. 33 private static final String launcher_name = ""; 34 private static final String java_version = AndroidHardcodedSystemProperties.JAVA_VERSION; 35 private static final String java_runtime_name = "Android Runtime"; 36 private static final String java_runtime_version = "0.9"; 37 38 // Called by java.lang.System.<clinit> 39 public static void initSystemProperties() { 40 System.setUnchangeableSystemProperty("java.version", java_version); 41 System.setUnchangeableSystemProperty("java.runtime.version", java_runtime_version); 42 System.setUnchangeableSystemProperty("java.runtime.name", java_runtime_name); 43 } 44 45 private static boolean versionsInitialized = false; 46 private static int jvm_major_version = 0; 47 private static int jvm_minor_version = 0; 48 private static int jvm_micro_version = 0; 49 private static int jvm_update_version = 0; 50 private static int jvm_build_number = 0; 51 private static String jvm_special_version = null; 52 private static int jdk_major_version = 0; 53 private static int jdk_minor_version = 0; 54 private static int jdk_micro_version = 0; 55 private static int jdk_update_version = 0; 56 private static int jdk_build_number = 0; 57 private static String jdk_special_version = null; 58 59 /** 60 * In case you were wondering this method is called by java -version. 61 * Sad that it prints to stderr; would be nicer if default printed on 62 * stdout. 63 */ 64 public static void print() { 65 print(System.err); 66 } 67 68 /** 69 * This is the same as print except that it adds an extra line-feed 70 * at the end, typically used by the -showversion in the launcher 71 */ 72 public static void println() { 73 print(System.err); 74 System.err.println(); 75 } 76 77 /** 78 * Give a stream, it will print version info on it. 79 */ 80 public static void print(PrintStream ps) { 81 boolean isHeadless = false; 82 83 /* Report that we're running headless if the property is true */ 84 String headless = System.getProperty("java.awt.headless"); 85 if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) { 86 isHeadless = true; 87 } 88 89 /* First line: platform version. */ 90 ps.println(launcher_name + " version \"" + java_version + "\""); 91 92 /* Second line: runtime version (ie, libraries). */ 93 94 ps.print(java_runtime_name + " (build " + java_runtime_version); 95 96 if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) { 97 // embedded builds report headless state 98 ps.print(", headless"); 99 } 100 ps.println(')'); 101 102 /* Third line: JVM information. */ 103 String java_vm_name = System.getProperty("java.vm.name"); 104 String java_vm_version = System.getProperty("java.vm.version"); 105 String java_vm_info = System.getProperty("java.vm.info"); 106 ps.println(java_vm_name + " (build " + java_vm_version + ", " + 107 java_vm_info + ")"); 108 } 109 110 111 /** 112 * Returns the major version of the running JVM if it's 1.6 or newer 113 * or any RE VM build. It will return 0 if it's an internal 1.5 or 114 * 1.4.x build. 115 * 116 * @since 1.6 117 */ 118 public static synchronized int jvmMajorVersion() { 119 if (!versionsInitialized) { 120 initVersions(); 121 } 122 return jvm_major_version; 123 } 124 125 /** 126 * Returns the minor version of the running JVM if it's 1.6 or newer 127 * or any RE VM build. It will return 0 if it's an internal 1.5 or 128 * 1.4.x build. 129 * @since 1.6 130 */ 131 public static synchronized int jvmMinorVersion() { 132 if (!versionsInitialized) { 133 initVersions(); 134 } 135 return jvm_minor_version; 136 } 137 138 139 /** 140 * Returns the micro version of the running JVM if it's 1.6 or newer 141 * or any RE VM build. It will return 0 if it's an internal 1.5 or 142 * 1.4.x build. 143 * @since 1.6 144 */ 145 public static synchronized int jvmMicroVersion() { 146 if (!versionsInitialized) { 147 initVersions(); 148 } 149 return jvm_micro_version; 150 } 151 152 /** 153 * Returns the update release version of the running JVM if it's 154 * a RE build. It will return 0 if it's an internal build. 155 * @since 1.6 156 */ 157 public static synchronized int jvmUpdateVersion() { 158 if (!versionsInitialized) { 159 initVersions(); 160 } 161 return jvm_update_version; 162 } 163 164 public static synchronized String jvmSpecialVersion() { 165 if (!versionsInitialized) { 166 initVersions(); 167 } 168 if (jvm_special_version == null) { 169 jvm_special_version = getJvmSpecialVersion(); 170 } 171 return jvm_special_version; 172 } 173 public static native String getJvmSpecialVersion(); 174 175 /** 176 * Returns the build number of the running JVM if it's a RE build 177 * It will return 0 if it's an internal build. 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 * 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 * @since 1.6 202 */ 203 public static synchronized int jdkMinorVersion() { 204 if (!versionsInitialized) { 205 initVersions(); 206 } 207 return jdk_minor_version; 208 } 209 210 /** 211 * Returns the micro version of the running JDK. 212 * @since 1.6 213 */ 214 public static synchronized int jdkMicroVersion() { 215 if (!versionsInitialized) { 216 initVersions(); 217 } 218 return jdk_micro_version; 219 } 220 221 /** 222 * Returns the update release version of the running JDK if it's 223 * a RE build. It will return 0 if it's an internal build. 224 * @since 1.6 225 */ 226 public static synchronized int jdkUpdateVersion() { 227 if (!versionsInitialized) { 228 initVersions(); 229 } 230 return jdk_update_version; 231 } 232 233 public static synchronized String jdkSpecialVersion() { 234 if (!versionsInitialized) { 235 initVersions(); 236 } 237 if (jdk_special_version == null) { 238 jdk_special_version = getJdkSpecialVersion(); 239 } 240 return jdk_special_version; 241 } 242 public static native String getJdkSpecialVersion(); 243 244 /** 245 * Returns the build number of the running JDK if it's a RE build 246 * It will return 0 if it's an internal build. 247 * @since 1.6 248 */ 249 public static synchronized int jdkBuildNumber() { 250 if (!versionsInitialized) { 251 initVersions(); 252 } 253 return jdk_build_number; 254 } 255 256 // true if JVM exports the version info including the capabilities 257 private static boolean jvmVersionInfoAvailable; 258 private static synchronized void initVersions() { 259 if (versionsInitialized) { 260 return; 261 } 262 jvmVersionInfoAvailable = getJvmVersionInfo(); 263 if (!jvmVersionInfoAvailable) { 264 // parse java.vm.version for older JVM before the 265 // new JVM_GetVersionInfo is added. 266 // valid format of the version string is: 267 // n.n.n[_uu[c]][-<identifer>]-bxx 268 CharSequence cs = System.getProperty("java.vm.version"); 269 if (cs.length() >= 5 && 270 Character.isDigit(cs.charAt(0)) && cs.charAt(1) == '.' && 271 Character.isDigit(cs.charAt(2)) && cs.charAt(3) == '.' && 272 Character.isDigit(cs.charAt(4))) { 273 jvm_major_version = Character.digit(cs.charAt(0), 10); 274 jvm_minor_version = Character.digit(cs.charAt(2), 10); 275 jvm_micro_version = Character.digit(cs.charAt(4), 10); 276 cs = cs.subSequence(5, cs.length()); 277 if (cs.charAt(0) == '_' && cs.length() >= 3 && 278 Character.isDigit(cs.charAt(1)) && 279 Character.isDigit(cs.charAt(2))) { 280 int nextChar = 3; 281 try { 282 String uu = cs.subSequence(1, 3).toString(); 283 jvm_update_version = Integer.parseInt(uu); 284 if (cs.length() >= 4) { 285 char c = cs.charAt(3); 286 if (c >= 'a' && c <= 'z') { 287 jvm_special_version = Character.toString(c); 288 nextChar++; 289 } 290 } 291 } catch (NumberFormatException e) { 292 // not conforming to the naming convention 293 return; 294 } 295 cs = cs.subSequence(nextChar, cs.length()); 296 } 297 if (cs.charAt(0) == '-') { 298 // skip the first character 299 // valid format: <identifier>-bxx or bxx 300 // non-product VM will have -debug|-release appended 301 cs = cs.subSequence(1, cs.length()); 302 String[] res = cs.toString().split("-"); 303 for (String s : res) { 304 if (s.charAt(0) == 'b' && s.length() == 3 && 305 Character.isDigit(s.charAt(1)) && 306 Character.isDigit(s.charAt(2))) { 307 jvm_build_number = 308 Integer.parseInt(s.substring(1, 3)); 309 break; 310 } 311 } 312 } 313 } 314 } 315 getJdkVersionInfo(); 316 versionsInitialized = true; 317 } 318 319 // Gets the JVM version info if available and sets the jvm_*_version fields 320 // and its capabilities. 321 // 322 // Return false if not available which implies an old VM (Tiger or before). 323 private static native boolean getJvmVersionInfo(); 324 private static native void getJdkVersionInfo(); 325 326 } 327 328 // Help Emacs a little because this file doesn't end in .java. 329 // 330 // Local Variables: *** 331 // mode: java *** 332 // End: *** 333
