Java Reference
In-Depth Information
A declaration
d
is said to be
visible at point p in a program
if the scope of
d
includes
p
, and
d
is not shadowed by any other declaration at
p
.
When the program point we are discussing is clear from context, we will often simply say
that a declaration is
visible
.
A declaration
d
of a type named
n
shadows the declarations of any other types named
n
that
are in scope at the point where
d
occurs throughout the scope of
d
.
A declaration
d
of a field or formal parameter named
n
shadows, throughout the scope of
d
, the declarations of any other variables named
n
that are in scope at the point where
d
occurs.
A declaration
d
of a local variable or exception parameter named
n
shadows, throughout
the scope of
d
, (a) the declarations of any other fields named
n
that are in scope at the point
where
d
occurs, and (b) the declarations of any other variables named
n
that are in scope at
the point where
d
occurs but are
not
declared in the innermost class in which
d
is declared.
A declaration
d
of a method named
n
shadows the declarations of any other methods named
n
that are in an enclosing scope at the point where
d
occurs throughout the scope of
d
.
A package declaration never shadows any other declaration.
A type-import-on-demand declaration never causes any other declaration to be shadowed.
A static-import-on-demand declaration never causes any other declaration to be shadowed.
A single-type-import declaration
d
in a compilation unit
c
of package
p
that imports a type
named
n
shadows, throughout
c
, the declarations of:
• any top level type named
n
declared in another compilation unit of
p
• any type named
n
imported by a type-import-on-demand declaration in
c
• any type named
n
imported by a static-import-on-demand declaration in
c
A single-static-import declaration
d
in a compilation unit
c
of package
p
that imports a field
named
n
shadows the declaration of any static field named
n
imported by a static-import-
on-demand declaration in
c
, throughout
c
.
A single-static-import declaration
d
in a compilation unit
c
of package
p
that imports a
method named
n
with signature
s
shadows the declaration of any static method named
n
with signature
s
imported by a static-import-on-demand declaration in
c
, throughout
c
.
A single-static-import declaration
d
in a compilation unit
c
of package
p
that imports a type
named
n
shadows, throughout
c
, the declarations of:
