<s>
In	O
object-oriented	B-Language
programming	I-Language
,	O
a	O
wrapper	B-Language
class	I-Language
is	O
a	O
class	O
that	O
encapsulates	B-Application
types	O
,	O
so	O
that	O
those	O
types	O
can	O
be	O
used	O
to	O
create	O
object	O
instances	O
and	O
methods	B-Language
in	O
another	O
class	O
that	O
needs	O
those	O
types	O
.	O
</s>
<s>
So	O
a	O
primitive	B-Language
wrapper	I-Language
class	I-Language
is	O
a	O
wrapper	B-Language
class	I-Language
that	O
encapsulates	B-Application
,	O
hides	O
or	O
wraps	O
data	O
types	O
from	O
the	O
eight	O
primitive	O
data	O
types	O
,	O
so	O
that	O
these	O
can	O
be	O
used	O
to	O
create	O
instantiated	O
objects	O
with	O
methods	B-Language
in	O
another	O
class	O
or	O
in	O
other	O
classes	O
.	O
</s>
<s>
The	O
primitive	B-Language
wrapper	I-Language
classes	O
are	O
found	O
in	O
the	O
Java	B-Language
API	I-Language
.	O
</s>
<s>
Primitive	B-Language
wrapper	I-Language
classes	O
are	O
used	O
to	O
create	O
an	O
that	O
needs	O
to	O
represent	O
primitive	O
types	O
in	O
classes	O
(	O
i.e.	O
,	O
in	O
the	O
Java	B-Language
API	I-Language
)	O
,	O
in	O
the	O
package	O
and	O
in	O
the	O
reflection	B-Language
package	O
.	O
</s>
<s>
The	O
primitive	B-Language
wrapper	I-Language
classes	O
and	O
their	O
corresponding	O
primitive	O
types	O
are	O
:	O
</s>
<s>
Wrapper	B-Language
class	I-Language
!	O
</s>
<s>
Primitive	B-Language
wrapper	I-Language
classes	O
are	O
not	O
the	O
same	O
thing	O
as	O
primitive	O
types	O
.	O
</s>
<s>
Whereas	O
variables	O
,	O
for	O
example	O
,	O
can	O
be	O
declared	O
in	O
Java	B-Language
as	O
data	O
types	O
double	O
,	O
short	O
,	O
int	O
,	O
etc.	O
,	O
the	O
primitive	B-Language
wrapper	I-Language
classes	O
create	O
instantiated	O
objects	O
and	O
methods	B-Language
that	O
inherit	O
but	O
hide	O
the	O
primitive	O
data	O
types	O
,	O
not	O
like	O
variables	O
that	O
are	O
assigned	O
the	O
data	O
type	O
values	O
.	O
</s>
<s>
Therefore	O
,	O
the	O
term	O
Primitive	B-Language
wrapper	I-Language
class	I-Language
does	O
not	O
mean	O
that	O
wrapper	O
classes	O
are	O
primitive	O
types	O
.	O
</s>
<s>
The	O
wrapper	O
classes	O
BigDecimal	O
and	O
BigInteger	O
are	O
not	O
one	O
of	O
the	O
primitive	B-Language
wrapper	I-Language
classes	O
but	O
are	O
immutable	O
.	O
</s>
<s>
With	O
Java	B-Language
5.0	O
,	O
additional	O
wrapper	O
classes	O
were	O
introduced	O
in	O
the	O
package	O
.	O
</s>
<s>
Instead	O
,	O
they	O
provide	O
atomic	B-General_Concept
operations	I-General_Concept
for	O
addition	O
,	O
increment	O
and	O
assignment	O
.	O
</s>
<s>
The	O
AtomicReference	O
class	O
accepts	O
the	O
type	B-Language
parameter	I-Language
V	O
that	O
specifies	O
the	O
type	O
of	O
the	O
object	O
reference	O
.	O
</s>
<s>
(	O
See	O
"	O
Generics	B-Language
in	I-Language
Java	I-Language
"	O
for	O
a	O
description	O
of	O
type	B-Language
parameters	I-Language
in	O
Java	B-Language
)	O
.	O
</s>
