<s>
There	O
are	O
two	O
types	O
of	O
Java	B-Language
programming	I-Language
language	I-Language
application	B-Application
programming	I-Application
interfaces	I-Application
(	O
APIs	B-Application
)	O
:	O
</s>
<s>
The	O
official	O
core	O
Java	B-Language
API	I-Language
,	O
contained	O
in	O
the	O
Android	O
(	O
Google	O
)	O
,	O
SE	O
(	O
OpenJDK	O
and	O
Oracle	O
)	O
,	O
MicroEJ	O
.	O
</s>
<s>
These	O
packages	O
(	O
java	B-Device
.	O
</s>
<s>
*	O
packages	O
)	O
are	O
the	O
core	O
Java	B-Language
language	I-Language
packages	O
,	O
meaning	O
that	O
programmers	O
using	O
the	O
Java	B-Language
language	I-Language
had	O
to	O
use	O
them	O
in	O
order	O
to	O
make	O
any	O
worthwhile	O
use	O
of	O
the	O
Java	B-Language
language	I-Language
.	O
</s>
<s>
Optional	O
APIs	B-Application
that	O
can	O
be	O
downloaded	O
separately	O
.	O
</s>
<s>
The	O
specification	O
of	O
these	O
APIs	B-Application
are	O
defined	O
according	O
to	O
many	O
different	O
organizations	O
in	O
the	O
world	O
(	O
Alljoyn	O
,	O
OSGi	O
,	O
Eclipse	B-Application
,	O
JCP	O
,	O
E-S-R	O
,	O
etc	O
.	O
</s>
<s>
The	O
following	O
is	O
a	O
partial	O
list	O
of	O
application	B-Application
programming	I-Application
interfaces	I-Application
(	O
APIs	B-Application
)	O
for	O
Java	B-Device
.	O
</s>
<s>
Name	O
Acronym	O
Description	O
and	O
Version	O
History	O
Available	O
from	O
Java	B-Language
Advanced	I-Language
Imaging	I-Language
JAI	O
A	O
set	O
of	O
interfaces	O
that	O
support	O
a	O
high-level	O
programming	O
model	O
allowing	O
to	O
manipulate	O
images	O
easily	O
.	O
</s>
<s>
Association	O
for	O
the	O
standardization	O
of	O
embedded	O
platforms	O
E-S-R	O
consortium	O
here	O
Java	B-Language
Data	I-Language
Objects	I-Language
JDO	O
A	O
specification	O
of	O
Java	B-Device
object	O
persistence	B-Application
.	O
</s>
<s>
Android	O
API	B-Application
Google	O
here	O
JavaHelp	B-Protocol
A	O
full-featured	O
,	O
extensible	O
help	O
system	O
that	O
enables	O
you	O
to	O
incorporate	O
online	O
help	O
in	O
applets	O
,	O
components	O
,	O
applications	O
,	O
operating	O
systems	O
,	O
and	O
devices	O
.	O
</s>
<s>
available	O
here	O
Java	B-Language
Media	I-Language
Framework	I-Language
JMF	O
An	O
API	B-Application
that	O
enables	O
audio	O
,	O
video	O
and	O
other	O
time-based	O
media	O
to	O
be	O
added	O
to	O
Java	B-Device
applications	O
and	O
applets	O
.	O
</s>
<s>
Java	B-Language
Naming	I-Language
and	I-Language
Directory	I-Language
Interface	I-Language
JNDI	B-Language
An	O
API	B-Application
for	O
directory	O
services	O
.	O
</s>
<s>
Jakarta	B-Language
Persistence	I-Language
JPA	O
A	O
specification	O
for	O
object-relational	B-General_Concept
mapping	I-General_Concept
.	O
</s>
<s>
available	O
here	O
Java	B-Language
Speech	I-Language
API	I-Language
JSAPI	O
This	O
API	B-Application
allows	O
for	O
speech	B-Application
synthesis	I-Application
and	O
speech	B-Application
recognition	I-Application
.	O
</s>
<s>
Java	B-Language
3D	I-Language
J3D	O
A	O
scene	O
graph-based	O
3D	O
API	B-Application
.	O
</s>
<s>
available	O
here	O
Java	B-Language
OpenGL	I-Language
JOGL	B-Language
A	O
wrapper	O
library	O
for	O
OpenGL	B-Application
.	O
</s>
<s>
available	O
here	O
Java	B-Device
USB	O
for	O
Windows	O
(	O
none	O
)	O
A	O
USB	O
communication	O
of	O
Java	B-Device
applications	O
available	O
here	O
RestFB	O
(	O
none	O
)	O
Facebook	O
API	B-Application
wrapper	O
in	O
Java	B-Device
.	O
</s>
<s>
Following	O
is	O
a	O
very	O
incomplete	O
list	O
,	O
as	O
the	O
number	O
of	O
APIs	B-Application
available	O
for	O
the	O
Java	B-Device
platform	I-Device
is	O
overwhelming	O
.	O
</s>
<s>
Real	O
time	O
Java	B-Device
is	O
a	O
catch-all	O
term	O
for	O
a	O
combination	O
of	O
technologies	O
that	O
allows	O
programmers	O
to	O
write	O
programs	O
that	O
meet	O
the	O
demands	O
of	O
real-time	O
systems	O
in	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
Java	B-Device
's	O
sophisticated	O
memory	O
management	O
,	O
native	O
support	O
for	O
threading	O
and	O
concurrency	O
,	O
type	O
safety	O
,	O
</s>
<s>
Java	B-Device
supports	O
a	O
strict	O
priority	O
based	O
threading	O
model	O
.	O
</s>
<s>
Because	O
Java	B-Device
threads	O
support	O
priorities	O
,	O
Java	B-Device
locking	O
mechanisms	O
support	O
priority	O
inversion	O
avoidance	O
techniques	O
,	O
such	O
as	O
priority	O
inheritance	O
or	O
the	O
priority	O
ceiling	O
protocol	O
.	O
</s>
<s>
To	O
overcome	O
typical	O
real	O
time	O
difficulties	O
,	O
the	O
Java	B-Device
Community	O
introduced	O
a	O
specification	O
for	O
real-time	O
Java	B-Device
,	O
JSR001	O
.	O
</s>
<s>
A	O
number	O
of	O
implementations	O
of	O
the	O
resulting	O
Real-Time	O
Specification	O
for	O
Java	B-Device
(	O
RTSJ	O
)	O
have	O
emerged	O
,	O
including	O
a	O
reference	O
implementation	O
from	O
Timesys	O
,	O
IBM	O
's	O
WebSphere	O
Real	O
Time	O
,	O
Sun	O
Microsystems	O
's	O
Java	B-Device
SE	O
Real-Time	O
Systems,[1]	O
Aonix	O
PERC	O
or	O
JamaicaVM	O
from	O
aicas	O
.	O
</s>
<s>
The	O
Real-Time	O
Specification	O
for	O
Java	B-Device
(	O
RTSJ	O
)	O
is	O
a	O
set	O
of	O
interfaces	O
and	O
behavioral	O
refinements	O
that	O
enable	O
real-time	O
computer	O
programming	O
in	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
RTSJ	O
1.0	O
was	O
developed	O
as	O
JSR	O
1	O
under	O
the	O
Java	B-Device
Community	O
Process	O
,	O
which	O
approved	O
the	O
new	O
standard	O
in	O
November	O
,	O
2001	O
.	O
</s>
<s>
The	O
windowing	O
library	O
is	O
a	O
set	O
of	O
classes	O
available	O
in	O
the	O
Streams	O
Processing	O
Language	O
(	O
SPL	O
)	O
Runtime	O
C++	O
API	B-Application
and	O
the	O
SPL	O
Java™	O
Operator	O
API	B-Application
.	O
</s>
<s>
There	O
are	O
a	O
few	O
differences	O
when	O
implementing	O
primitive	O
operators	O
in	O
C++	O
and	O
Java	B-Device
that	O
take	O
advantage	O
of	O
the	O
SPL	O
window	O
clause	O
.	O
</s>
<s>
They	O
are	O
free	O
to	O
use	O
the	O
SPL	O
Operator	O
Code	O
Generation	O
API	B-Application
just	O
to	O
get	O
the	O
specified	O
window	O
policy	O
for	O
a	O
given	O
operator	O
instance	O
.	O
</s>
<s>
In	O
the	O
Java	B-Device
implementation	O
,	O
developers	O
must	O
use	O
the	O
window	O
library	O
.	O
</s>
<s>
This	O
use	O
is	O
required	O
because	O
Java	B-Device
operators	O
are	O
not	O
based	O
on	O
code	O
generation	O
.	O
</s>
