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src/java.compiler/share/classes/javax/lang/model/SourceVersion.java

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  39  * <p>Note that additional source version constants will be added to
  40  * model future releases of the language.
  41  *
  42  * @author Joseph D. Darcy
  43  * @author Scott Seligman
  44  * @author Peter von der Ah&eacute;
  45  * @since 1.6
  46  */
  47 public enum SourceVersion {
  48     /*
  49      * Summary of language evolution
  50      * 1.1: nested classes
  51      * 1.2: strictfp
  52      * 1.3: no changes
  53      * 1.4: assert
  54      * 1.5: annotations, generics, autoboxing, var-args...
  55      * 1.6: no changes
  56      * 1.7: diamond syntax, try-with-resources, etc.
  57      * 1.8: lambda expressions and default methods
  58      *   9: modules, small cleanups to 1.7 and 1.8 changes

  59      */
  60 
  61     /**
  62      * The original version.
  63      *
  64      * The language described in
  65      * <cite>The Java&trade; Language Specification, First Edition</cite>.
  66      */
  67     RELEASE_0,
  68 
  69     /**
  70      * The version recognized by the Java Platform 1.1.
  71      *
  72      * The language is {@code RELEASE_0} augmented with nested classes as described in the 1.1 update to
  73      * <cite>The Java&trade; Language Specification, First Edition</cite>.
  74      */
  75     RELEASE_1,
  76 
  77     /**
  78      * The version recognized by the Java 2 Platform, Standard Edition,


 133     RELEASE_7,
 134 
 135     /**
 136      * The version recognized by the Java Platform, Standard Edition
 137      * 8.
 138      *
 139      * Additions in this release include lambda expressions and default methods.
 140      * @since 1.8
 141      */
 142     RELEASE_8,
 143 
 144     /**
 145      * The version recognized by the Java Platform, Standard Edition
 146      * 9.
 147      *
 148      * Additions in this release include modules and removal of a
 149      * single underscore from the set of legal identifier names.
 150      *
 151      * @since 9
 152      */
 153      RELEASE_9;








 154 
 155     // Note that when adding constants for newer releases, the
 156     // behavior of latest() and latestSupported() must be updated too.
 157 
 158     /**
 159      * Returns the latest source version that can be modeled.
 160      *
 161      * @return the latest source version that can be modeled
 162      */
 163     public static SourceVersion latest() {
 164         return RELEASE_9;
 165     }
 166 
 167     private static final SourceVersion latestSupported = getLatestSupported();
 168 
 169     private static SourceVersion getLatestSupported() {
 170         try {
 171             String specVersion = System.getProperty("java.specification.version");
 172 
 173             switch (specVersion) {


 174                 case "9":
 175                 case "1.9":
 176                     return RELEASE_9;
 177                 case "1.8":
 178                     return RELEASE_8;
 179                 case "1.7":
 180                     return RELEASE_7;
 181                 case "1.6":
 182                     return RELEASE_6;
 183             }
 184         } catch (SecurityException se) {}
 185 
 186         return RELEASE_5;
 187     }
 188 
 189     /**
 190      * Returns the latest source version fully supported by the
 191      * current execution environment.  {@code RELEASE_5} or later must
 192      * be returned.
 193      *




  39  * <p>Note that additional source version constants will be added to
  40  * model future releases of the language.
  41  *
  42  * @author Joseph D. Darcy
  43  * @author Scott Seligman
  44  * @author Peter von der Ah&eacute;
  45  * @since 1.6
  46  */
  47 public enum SourceVersion {
  48     /*
  49      * Summary of language evolution
  50      * 1.1: nested classes
  51      * 1.2: strictfp
  52      * 1.3: no changes
  53      * 1.4: assert
  54      * 1.5: annotations, generics, autoboxing, var-args...
  55      * 1.6: no changes
  56      * 1.7: diamond syntax, try-with-resources, etc.
  57      * 1.8: lambda expressions and default methods
  58      *   9: modules, small cleanups to 1.7 and 1.8 changes
  59      *  10: to-be-determined changes
  60      */
  61 
  62     /**
  63      * The original version.
  64      *
  65      * The language described in
  66      * <cite>The Java&trade; Language Specification, First Edition</cite>.
  67      */
  68     RELEASE_0,
  69 
  70     /**
  71      * The version recognized by the Java Platform 1.1.
  72      *
  73      * The language is {@code RELEASE_0} augmented with nested classes as described in the 1.1 update to
  74      * <cite>The Java&trade; Language Specification, First Edition</cite>.
  75      */
  76     RELEASE_1,
  77 
  78     /**
  79      * The version recognized by the Java 2 Platform, Standard Edition,


 134     RELEASE_7,
 135 
 136     /**
 137      * The version recognized by the Java Platform, Standard Edition
 138      * 8.
 139      *
 140      * Additions in this release include lambda expressions and default methods.
 141      * @since 1.8
 142      */
 143     RELEASE_8,
 144 
 145     /**
 146      * The version recognized by the Java Platform, Standard Edition
 147      * 9.
 148      *
 149      * Additions in this release include modules and removal of a
 150      * single underscore from the set of legal identifier names.
 151      *
 152      * @since 9
 153      */
 154      RELEASE_9,
 155 
 156     /**
 157      * The version recognized by the Java Platform, Standard Edition
 158      * 10.
 159      *
 160      * @since 10
 161      */
 162      RELEASE_10;
 163 
 164     // Note that when adding constants for newer releases, the
 165     // behavior of latest() and latestSupported() must be updated too.
 166 
 167     /**
 168      * Returns the latest source version that can be modeled.
 169      *
 170      * @return the latest source version that can be modeled
 171      */
 172     public static SourceVersion latest() {
 173         return RELEASE_10;
 174     }
 175 
 176     private static final SourceVersion latestSupported = getLatestSupported();
 177 
 178     private static SourceVersion getLatestSupported() {
 179         try {
 180             String specVersion = System.getProperty("java.specification.version");
 181 
 182             switch (specVersion) {
 183                 case "10":
 184                     return RELEASE_10;
 185                 case "9":
 186                 case "1.9":
 187                     return RELEASE_9;
 188                 case "1.8":
 189                     return RELEASE_8;
 190                 case "1.7":
 191                     return RELEASE_7;
 192                 case "1.6":
 193                     return RELEASE_6;
 194             }
 195         } catch (SecurityException se) {}
 196 
 197         return RELEASE_5;
 198     }
 199 
 200     /**
 201      * Returns the latest source version fully supported by the
 202      * current execution environment.  {@code RELEASE_5} or later must
 203      * be returned.
 204      *


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