|
Scala 2.3.3
|
final abstract class
Null
extends
java.lang.Object
Class Null
(previously named AllRef
in
Scala 2.2.0 and
older versions) is - together with class
Nothing
- at the bottom of the
Scala type
hierarchy.
Type Null
is a subtype of all reference types; its
only instance is the null
reference.
Since Null
is not a subtype of value types,
null
is not a member of any such type. For instance,
it is not possible to assign null
to a variable of
type Int
.