69  * Therefore, methods whose names begin with {@code "visit"} may be
  70  * added to this class in the future; to avoid incompatibilities,
  71  * classes which extend this class should not declare any instance
  72  * methods with names beginning with {@code "visit"}.
  73  *
  74  * <p>When such a new visit method is added, the default
  75  * implementation in this class will be to call the {@link
  76  * #visitUnknown visitUnknown} method.  A new element scanner visitor
  77  * class will also be introduced to correspond to the new language
  78  * level; this visitor will have different default behavior for the
  79  * visit method in question.  When the new visitor is introduced, all
  80  * or portions of this visitor may be deprecated.
  81  *
  82  * @param <R> the return type of this visitor's methods.  Use {@link
  83  *            Void} for visitors that do not need to return results.
  84  * @param <P> the type of the additional parameter to this visitor's
  85  *            methods.  Use {@code Void} for visitors that do not need an
  86  *            additional parameter.
  87  *
  88  * @see ElementScanner6

  89  * @since 1.7
  90  */
  91 @SupportedSourceVersion(RELEASE_7)
  92 public class ElementScanner7<R, P> extends ElementScanner6<R, P> {
  93     /**
  94      * Constructor for concrete subclasses; uses {@code null} for the
  95      * default value.
  96      */
  97     protected ElementScanner7(){
  98         super(null);
  99     }
 100 
 101     /**
 102      * Constructor for concrete subclasses; uses the argument for the
 103      * default value.
 104      */
 105     protected ElementScanner7(R defaultValue){
 106         super(defaultValue);
 107     }
 108 

  69  * Therefore, methods whose names begin with {@code "visit"} may be
  70  * added to this class in the future; to avoid incompatibilities,
  71  * classes which extend this class should not declare any instance
  72  * methods with names beginning with {@code "visit"}.
  73  *
  74  * <p>When such a new visit method is added, the default
  75  * implementation in this class will be to call the {@link
  76  * #visitUnknown visitUnknown} method.  A new element scanner visitor
  77  * class will also be introduced to correspond to the new language
  78  * level; this visitor will have different default behavior for the
  79  * visit method in question.  When the new visitor is introduced, all
  80  * or portions of this visitor may be deprecated.
  81  *
  82  * @param <R> the return type of this visitor's methods.  Use {@link
  83  *            Void} for visitors that do not need to return results.
  84  * @param <P> the type of the additional parameter to this visitor's
  85  *            methods.  Use {@code Void} for visitors that do not need an
  86  *            additional parameter.
  87  *
  88  * @see ElementScanner6
  89  * @see ElementScanner8
  90  * @since 1.7
  91  */
  92 @SupportedSourceVersion(RELEASE_7)
  93 public class ElementScanner7<R, P> extends ElementScanner6<R, P> {
  94     /**
  95      * Constructor for concrete subclasses; uses {@code null} for the
  96      * default value.
  97      */
  98     protected ElementScanner7(){
  99         super(null);
 100     }
 101 
 102     /**
 103      * Constructor for concrete subclasses; uses the argument for the
 104      * default value.
 105      */
 106     protected ElementScanner7(R defaultValue){
 107         super(defaultValue);
 108     }
 109