Java Reference
In-Depth Information
Listing 3-43.
Adding three elements to the
Stub
annotation type
public @interface Stub
{
int id(); // A semicolon must terminate an element de-
claration.
String dueDate();
String developer() default "unassigned";
}
The
id()
elementspecifiesa32-bitintegerthatidentifiesthestub.The
dueDate()
element specifies a
String
-based date that identifies when the method stub is to be
implemented.Finally,
developer()
specifiesthe
String
-basednameofthedeve-
loper responsible for coding the method stub.
Unlike
id()
and
dueDate()
,
developer()
isdeclaredwitha
default
value,
"unassigned"
. When you instantiate
Stub
and do not assign a value to
deve-
loper()
inthatinstance,asisthecasewith
Listing3-44
,
thisdefaultvalueisassigned
to
developer()
.
Listing 3-44.
Initializing a
Stub
instance's elements
public class Deck
{
@Stub
(
id = 1,
dueDate = "12/21/2012"
)
public void shuffle()
{
}
}
its
dueDate()
elementto
"12/21/2012"
.Eachelementnamedoesnothaveatrail-
ing
()
,andthecomma-separatedlistoftwoelementinitializersappearsbetween
(
and
)
.
