Is this autoboxing?
Object ob = 8;
Will the above code first wrap the int literal 8 in an Integer and then assign its reference to variable ob? Because the java language specification has nothing on this case.
Will the above code first wrap the int literal 8 in an Integer and then assign its reference to variable ob?
Yes. (Or rather, it will box the int
value into an Integer
object, and then assign the reference to the variable ob
. The fact that the integer value is a literal is irrelevant here, really. It could be a method call returning int
, for example.)
Because the java language specification has nothing on this case.
That's not true. I mean, it doesn't explicitly deal with assigning to Object
, but it works the same way as normal conversions.
Section 5.1.7 of the specification deals with boxing, which would convert int
to Integer
... and then assigning an Integer
reference to an Object
variable is a normal reference conversion.