1 /* |
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2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.misc; |
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27 import java.io.PrintStream; |
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28 |
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29 public class Version { |
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30 |
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31 |
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32 private static final String launcher_name = |
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33 "@@LAUNCHER_NAME@@"; |
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34 |
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35 private static final String java_version = |
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36 "@@VERSION_SHORT@@"; |
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37 |
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38 private static final String java_runtime_name = |
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39 "@@RUNTIME_NAME@@"; |
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40 |
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41 private static final String java_runtime_version = |
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42 "@@VERSION_STRING@@"; |
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43 |
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44 static { |
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45 init(); |
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46 } |
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47 |
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48 public static void init() { |
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49 System.setProperty("java.version", java_version); |
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50 System.setProperty("java.runtime.version", java_runtime_version); |
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51 System.setProperty("java.runtime.name", java_runtime_name); |
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52 } |
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53 |
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54 private static boolean versionsInitialized = false; |
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55 private static int jvm_major_version = 0; |
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56 private static int jvm_minor_version = 0; |
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57 private static int jvm_security_version = 0; |
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58 private static int jvm_patch_version = 0; |
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59 private static int jvm_build_number = 0; |
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60 private static int jdk_major_version = 0; |
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61 private static int jdk_minor_version = 0; |
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62 private static int jdk_security_version = 0; |
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63 private static int jdk_patch_version = 0; |
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64 private static int jdk_build_number = 0; |
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65 |
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66 /** |
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67 * In case you were wondering this method is called by java -version. |
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68 * Sad that it prints to stderr; would be nicer if default printed on |
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69 * stdout. |
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70 */ |
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71 public static void print() { |
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72 print(System.err); |
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73 } |
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74 |
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75 /** |
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76 * This is the same as print except that it adds an extra line-feed |
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77 * at the end, typically used by the -showversion in the launcher |
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78 */ |
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79 public static void println() { |
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80 print(System.err); |
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81 System.err.println(); |
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82 } |
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83 |
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84 /** |
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85 * Give a stream, it will print version info on it. |
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86 */ |
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87 public static void print(PrintStream ps) { |
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88 boolean isHeadless = false; |
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89 |
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90 /* Report that we're running headless if the property is true */ |
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91 String headless = System.getProperty("java.awt.headless"); |
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92 if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) { |
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93 isHeadless = true; |
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94 } |
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95 |
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96 /* First line: platform version. */ |
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97 ps.println(launcher_name + " version \"" + java_version + "\""); |
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98 |
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99 /* Second line: runtime version (ie, libraries). */ |
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100 |
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101 String jdk_debug_level = System.getProperty("jdk.debug", "release"); |
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102 /* Debug level is not printed for "release" builds */ |
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103 if ("release".equals(jdk_debug_level)) { |
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104 jdk_debug_level = ""; |
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105 } else { |
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106 jdk_debug_level = jdk_debug_level + " "; |
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107 } |
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108 |
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109 ps.print(java_runtime_name + " (" + jdk_debug_level + "build " + java_runtime_version); |
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110 |
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111 if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) { |
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112 // embedded builds report headless state |
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113 ps.print(", headless"); |
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114 } |
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115 ps.println(')'); |
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116 |
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117 /* Third line: JVM information. */ |
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118 String java_vm_name = System.getProperty("java.vm.name"); |
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119 String java_vm_version = System.getProperty("java.vm.version"); |
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120 String java_vm_info = System.getProperty("java.vm.info"); |
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121 ps.println(java_vm_name + " (" + jdk_debug_level + "build " + java_vm_version + ", " + |
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122 java_vm_info + ")"); |
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123 } |
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124 |
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125 |
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126 /** |
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127 * Returns the major version of the running JVM. |
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128 * @return the major version of the running JVM |
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129 * @since 1.6 |
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130 */ |
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131 public static synchronized int jvmMajorVersion() { |
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132 if (!versionsInitialized) { |
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133 initVersions(); |
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134 } |
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135 return jvm_major_version; |
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136 } |
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137 |
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138 /** |
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139 * Returns the minor version of the running JVM. |
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140 * @return the minor version of the running JVM |
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141 * @since 1.6 |
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142 */ |
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143 public static synchronized int jvmMinorVersion() { |
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144 if (!versionsInitialized) { |
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145 initVersions(); |
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146 } |
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147 return jvm_minor_version; |
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148 } |
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149 |
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150 |
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151 /** |
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152 * Returns the security version of the running JVM. |
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153 * @return the security version of the running JVM |
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154 * @since 9 |
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155 */ |
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156 public static synchronized int jvmSecurityVersion() { |
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157 if (!versionsInitialized) { |
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158 initVersions(); |
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159 } |
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160 return jvm_security_version; |
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161 } |
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162 |
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163 /** |
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164 * Returns the patch release version of the running JVM. |
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165 * @return the patch release version of the running JVM |
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166 * @since 9 |
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167 */ |
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168 public static synchronized int jvmPatchVersion() { |
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169 if (!versionsInitialized) { |
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170 initVersions(); |
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171 } |
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172 return jvm_patch_version; |
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173 } |
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174 |
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175 /** |
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176 * Returns the build number of the running JVM. |
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177 * @return the build number of the running JVM |
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178 * @since 1.6 |
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179 */ |
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180 public static synchronized int jvmBuildNumber() { |
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181 if (!versionsInitialized) { |
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182 initVersions(); |
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183 } |
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184 return jvm_build_number; |
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185 } |
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186 |
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187 /** |
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188 * Returns the major version of the running JDK. |
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189 * @return the major version of the running JDK |
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190 * @since 1.6 |
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191 */ |
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192 public static synchronized int jdkMajorVersion() { |
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193 if (!versionsInitialized) { |
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194 initVersions(); |
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195 } |
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196 return jdk_major_version; |
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197 } |
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198 |
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199 /** |
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200 * Returns the minor version of the running JDK. |
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201 * @return the minor version of the running JDK |
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202 * @since 1.6 |
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203 */ |
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204 public static synchronized int jdkMinorVersion() { |
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205 if (!versionsInitialized) { |
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206 initVersions(); |
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207 } |
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208 return jdk_minor_version; |
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209 } |
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210 |
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211 /** |
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212 * Returns the security version of the running JDK. |
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213 * @return the security version of the running JDK |
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214 * @since 9 |
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215 */ |
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216 public static synchronized int jdkSecurityVersion() { |
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217 if (!versionsInitialized) { |
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218 initVersions(); |
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219 } |
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220 return jdk_security_version; |
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221 } |
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222 |
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223 /** |
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224 * Returns the patch release version of the running JDK. |
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225 * @return the patch release version of the running JDK |
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226 * @since 9 |
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227 */ |
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228 public static synchronized int jdkPatchVersion() { |
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229 if (!versionsInitialized) { |
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230 initVersions(); |
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231 } |
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232 return jdk_patch_version; |
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233 } |
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234 |
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235 /** |
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236 * Returns the build number of the running JDK. |
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237 * @return the build number of the running JDK |
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238 * @since 1.6 |
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239 */ |
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240 public static synchronized int jdkBuildNumber() { |
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241 if (!versionsInitialized) { |
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242 initVersions(); |
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243 } |
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244 return jdk_build_number; |
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245 } |
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246 |
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247 private static synchronized void initVersions() { |
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248 if (versionsInitialized) { |
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249 return; |
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250 } |
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251 if (!getJvmVersionInfo()) { |
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252 throw new InternalError("Unable to obtain JVM version info"); |
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253 } |
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254 getJdkVersionInfo(); |
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255 versionsInitialized = true; |
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256 } |
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257 |
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258 // Gets the JVM version info if available and sets the jvm_*_version fields |
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259 // and its capabilities. |
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260 private static native boolean getJvmVersionInfo(); |
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261 private static native void getJdkVersionInfo(); |
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262 } |
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263 |
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264 // Help Emacs a little because this file doesn't end in .java. |
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265 // |
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266 // Local Variables: *** |
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267 // mode: java *** |
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268 // End: *** |
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