<s>
Java	B-Language
Platform	I-Language
,	I-Language
Micro	I-Language
Edition	I-Language
or	O
Java	B-Device
ME	O
is	O
a	O
computing	B-Device
platform	I-Device
for	O
development	O
and	O
deployment	O
of	O
portable	O
code	O
for	O
embedded	B-Architecture
and	O
mobile	B-Application
devices	I-Application
(	O
micro-controllers	O
,	O
sensors	O
,	O
gateways	O
,	O
mobile	O
phones	O
,	O
personal	O
digital	O
assistants	O
,	O
TV	O
set-top	O
boxes	O
,	O
printers	O
)	O
.	O
</s>
<s>
JavaME	B-Language
was	O
formerly	O
known	O
as	O
Java	B-Language
2	I-Language
Platform	I-Language
,	I-Language
Micro	I-Language
Edition	I-Language
or	O
J2ME	B-Language
.	O
</s>
<s>
As	O
of	O
December	O
22	O
,	O
2006	O
,	O
the	O
JavaME	B-Language
source	O
code	O
is	O
licensed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
,	O
and	O
is	O
released	O
under	O
the	O
project	O
name	O
phoneME	B-Language
.	O
</s>
<s>
The	O
platform	O
uses	O
the	O
object-oriented	B-Language
Java	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
It	O
is	O
part	O
of	O
the	O
Java	B-Device
software-platform	I-Device
family	O
.	O
</s>
<s>
JavaME	B-Language
was	O
designed	O
by	O
Sun	O
Microsystems	O
,	O
acquired	O
by	O
Oracle	B-Application
Corporation	I-Application
in	O
2010	O
;	O
the	O
platform	O
replaced	O
a	O
similar	O
technology	O
,	O
PersonalJava	B-Language
.	O
</s>
<s>
Originally	O
developed	O
under	O
the	O
Java	B-Language
Community	I-Language
Process	I-Language
as	O
JSR	B-Language
68	I-Language
,	O
the	O
different	O
flavors	O
of	O
JavaME	B-Language
have	O
evolved	O
in	O
separate	O
JSRs	O
.	O
</s>
<s>
Oracle	B-Application
provides	O
a	O
reference	O
implementation	O
of	O
the	O
specification	O
,	O
but	O
has	O
tended	O
not	O
to	O
provide	O
free	O
binary	O
implementations	O
of	O
its	O
JavaME	B-Language
runtime	O
environment	O
for	O
mobile	B-Application
devices	I-Application
,	O
rather	O
relying	O
on	O
third	O
parties	O
to	O
provide	O
their	O
own	O
.	O
</s>
<s>
As	O
of	O
2008	O
,	O
all	O
JavaME	B-Language
platforms	B-Device
are	O
currently	O
restricted	O
to	O
JRE	B-Language
1.3	O
features	O
and	O
use	O
that	O
version	O
of	O
the	O
class	O
file	O
format	O
(	O
internally	O
known	O
as	O
version	O
47.0	O
)	O
.	O
</s>
<s>
Should	O
Oracle	B-Application
ever	O
declare	O
a	O
new	O
round	O
of	O
JavaME	B-Language
configuration	O
versions	O
that	O
support	O
the	O
later	O
class	O
file	O
formats	O
and	O
language	O
features	O
,	O
such	O
as	O
those	O
corresponding	O
to	O
JRE	B-Language
1.5	O
or	O
1.6	O
(	O
notably	O
,	O
generics	B-Language
)	O
,	O
it	O
will	O
entail	O
extra	O
work	O
on	O
the	O
part	O
of	O
all	O
platform	O
vendors	O
to	O
update	O
their	O
JREs	O
.	O
</s>
<s>
Java	B-Language
ME	I-Language
devices	O
implement	O
a	O
profile	O
.	O
</s>
<s>
The	O
most	O
common	O
of	O
these	O
are	O
the	O
Mobile	B-Language
Information	I-Language
Device	I-Language
Profile	I-Language
aimed	O
at	O
mobile	B-Application
devices	I-Application
,	O
such	O
as	O
cell	O
phones	O
,	O
and	O
the	O
Personal	O
Profile	O
aimed	O
at	O
consumer	O
products	O
and	O
embedded	B-Architecture
devices	I-Architecture
like	O
set-top	O
boxes	O
and	O
PDAs	O
.	O
</s>
<s>
Profiles	O
are	O
subsets	O
of	O
configurations	O
,	O
of	O
which	O
there	O
are	O
currently	O
two	O
:	O
the	O
Connected	B-Language
Limited	I-Language
Device	I-Language
Configuration	I-Language
(	O
CLDC	B-Language
)	O
and	O
the	O
Connected	B-Language
Device	I-Language
Configuration	I-Language
(	O
CDC	O
)	O
.	O
</s>
<s>
There	O
are	O
more	O
than	O
2.1	O
billion	O
JavaME	B-Language
enabled	O
mobile	O
phones	O
and	O
PDAs	O
.	O
</s>
<s>
It	O
was	O
popular	O
in	O
sub-	O
$200	O
devices	O
such	O
as	O
Nokia	O
's	O
Series	B-Operating_System
40	I-Operating_System
.	O
</s>
<s>
It	O
was	O
also	O
used	O
on	O
the	O
Bada	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
and	O
on	O
Symbian	B-Operating_System
OS	I-Operating_System
along	O
with	O
native	O
software	O
.	O
</s>
<s>
Users	O
of	O
Windows	B-Operating_System
CE	I-Operating_System
,	O
Windows	B-Operating_System
Mobile	I-Operating_System
,	O
Maemo	B-Operating_System
,	O
MeeGo	B-Operating_System
and	O
Android	B-Application
can	O
download	O
JavaME	B-Language
for	O
their	O
respective	O
environments	O
(	O
"	O
proof-of-concept	O
"	O
for	O
Android	B-Application
)	O
.	O
</s>
<s>
The	O
Connected	B-Language
Limited	I-Language
Device	I-Language
Configuration	I-Language
(	O
CLDC	B-Language
)	O
contains	O
a	O
strict	O
subset	O
of	O
the	O
Java-class	O
libraries	O
,	O
and	O
is	O
the	O
minimum	O
amount	O
needed	O
for	O
a	O
Java	B-Language
virtual	I-Language
machine	I-Language
to	O
operate	O
.	O
</s>
<s>
CLDC	B-Language
is	O
basically	O
used	O
for	O
classifying	O
myriad	O
devices	O
into	O
a	O
fixed	O
configuration	O
.	O
</s>
<s>
A	O
configuration	O
provides	O
the	O
most	O
basic	O
set	O
of	O
libraries	O
and	O
virtual-machine	O
features	O
that	O
must	O
be	O
present	O
in	O
each	O
implementation	O
of	O
a	O
J2ME	B-Language
environment	O
.	O
</s>
<s>
When	O
coupled	O
with	O
one	O
or	O
more	O
profiles	O
,	O
the	O
Connected	B-Language
Limited	I-Language
Device	I-Language
Configuration	I-Language
gives	O
developers	O
a	O
solid	O
Java	B-Device
platform	I-Device
for	O
creating	O
applications	O
for	O
consumer	O
and	O
embedded	B-Architecture
devices	I-Architecture
.	O
</s>
<s>
The	O
configuration	O
is	O
designed	O
for	O
devices	O
with	O
160KB	O
to	O
512KB	O
total	O
memory	O
,	O
which	O
has	O
a	O
minimum	O
of	O
160KB	O
of	O
ROM	O
and	O
32KB	O
of	O
RAM	O
available	O
for	O
the	O
Java	B-Device
platform	I-Device
.	O
</s>
<s>
Designed	O
for	O
mobile	O
phones	O
,	O
the	O
Mobile	B-Language
Information	I-Language
Device	I-Language
Profile	I-Language
includes	O
a	O
GUI	B-Application
,	O
and	O
a	O
data	O
storage	O
API	B-Application
,	O
and	O
MIDP	B-Language
2.0	I-Language
includes	O
a	O
basic	O
2D	O
gaming	O
API	B-Application
.	O
</s>
<s>
Applications	O
written	O
for	O
this	O
profile	O
are	O
called	O
MIDlets	B-Language
.	O
</s>
<s>
Almost	O
all	O
new	O
cell	O
phones	O
come	O
with	O
a	O
MIDP	B-Language
implementation	O
,	O
and	O
it	O
is	O
now	O
the	O
de	O
facto	O
standard	O
for	O
downloadable	O
cell	B-Application
phone	I-Application
games	I-Application
.	O
</s>
<s>
However	O
,	O
many	O
cellphones	O
can	O
run	O
only	O
those	O
MIDlets	B-Language
that	O
have	O
been	O
approved	O
by	O
the	O
carrier	O
,	O
especially	O
in	O
North	O
America	O
.	O
</s>
<s>
JSR	B-Language
271	I-Language
:	O
Mobile	B-Language
Information	I-Language
Device	I-Language
Profile	I-Language
3	O
(	O
Final	O
release	O
on	O
Dec	O
9	O
,	O
2009	O
)	O
specified	O
the	O
3rd	O
generation	O
Mobile	B-Language
Information	I-Language
Device	I-Language
Profile	I-Language
(	O
MIDP3	O
)	O
,	O
expanding	O
upon	O
the	O
functionality	O
in	O
all	O
areas	O
as	O
well	O
as	O
improving	O
interoperability	O
across	O
devices	O
.	O
</s>
<s>
A	O
key	O
design	O
goal	O
of	O
MIDP3	O
is	O
backward	O
compatibility	O
with	O
MIDP2	B-Language
content	O
.	O
</s>
<s>
The	O
Information	B-Language
Module	I-Language
Profile	I-Language
(	O
IMP	O
)	O
is	O
a	O
profile	O
for	O
embedded	B-Architecture
,	O
"	O
headless	O
"	O
devices	O
such	O
as	O
vending	O
machines	O
,	O
industrial	O
embedded	B-Architecture
applications	O
,	O
security	O
systems	O
,	O
and	O
similar	O
devices	O
with	O
either	O
simple	O
or	O
no	O
display	O
and	O
with	O
some	O
limited	O
network	O
connectivity	O
.	O
</s>
<s>
Originally	O
introduced	O
by	O
Siemens	O
Mobile	O
and	O
Nokia	O
as	O
JSR-195	O
,	O
IMP	O
1.0	O
is	O
a	O
strict	O
subset	O
of	O
MIDP	B-Language
1.0	O
except	O
that	O
it	O
does	O
n't	O
include	O
user	B-Application
interface	I-Application
APIs	B-Application
in	O
other	O
words	O
,	O
it	O
does	O
n't	O
include	O
support	O
for	O
the	O
Java	B-Device
package	O
javax.microedition.lcdui	O
.	O
</s>
<s>
JSR-228	O
,	O
also	O
known	O
as	O
IMP-NG	O
,	O
is	O
IMP	O
's	O
next	O
generation	O
that	O
is	O
based	O
on	O
MIDP	B-Language
2.0	I-Language
,	O
leveraging	O
MIDP	B-Language
2.0	I-Language
'	O
s	O
new	O
security	O
and	O
networking	O
types	O
and	O
APIs	B-Application
,	O
and	O
other	O
APIs	B-Application
such	O
as	O
PushRegistry	O
and	O
platformRequest( )	O
,	O
but	O
again	O
it	O
does	O
n't	O
include	O
UI	O
APIs	B-Application
,	O
nor	O
the	O
game	O
API	B-Application
.	O
</s>
<s>
The	O
Connected	B-Language
Device	I-Language
Configuration	I-Language
is	O
a	O
subset	O
of	O
Java	B-Language
SE	I-Language
,	O
containing	O
almost	O
all	O
the	O
libraries	O
that	O
are	O
not	O
GUI	B-Application
related	O
.	O
</s>
<s>
It	O
is	O
richer	O
than	O
CLDC	B-Language
.	O
</s>
<s>
The	O
Foundation	O
Profile	O
is	O
a	O
JavaME	B-Language
Connected	B-Language
Device	I-Language
Configuration	I-Language
(	O
CDC	O
)	O
profile	O
.	O
</s>
<s>
This	O
profile	O
is	O
intended	O
to	O
be	O
used	O
by	O
devices	O
requiring	O
a	O
complete	O
implementation	O
of	O
the	O
Java	B-Language
virtual	I-Language
machine	I-Language
up	O
to	O
and	O
including	O
the	O
entire	O
Java	B-Language
Platform	I-Language
,	I-Language
Standard	I-Language
Edition	I-Language
API	B-Application
.	O
</s>
<s>
Typical	O
implementations	O
will	O
use	O
some	O
subset	O
of	O
that	O
API	B-Application
set	O
depending	O
on	O
the	O
additional	O
profiles	O
supported	O
.	O
</s>
<s>
This	O
specification	O
was	O
developed	O
under	O
the	O
Java	B-Language
Community	I-Language
Process	I-Language
.	O
</s>
<s>
The	O
Personal	O
Basis	O
Profile	O
extends	O
the	O
Foundation	O
Profile	O
to	O
include	O
lightweight	O
GUI	B-Application
support	O
in	O
the	O
form	O
of	O
an	O
AWT	B-Language
subset	O
.	O
</s>
<s>
This	O
is	O
the	O
platform	O
that	O
BD-J	B-Language
is	O
built	O
upon	O
.	O
</s>
<s>
Sun	O
provides	O
a	O
reference	O
implementation	O
of	O
these	O
configurations	O
and	O
profiles	O
for	O
MIDP	B-Language
and	O
CDC	O
.	O
</s>
<s>
Starting	O
with	O
the	O
JavaME	B-Language
3.0	O
SDK	O
,	O
a	O
NetBeans-based	O
IDE	O
will	O
support	O
them	O
in	O
a	O
single	O
IDE	O
.	O
</s>
<s>
In	O
contrast	O
to	O
the	O
numerous	O
binary	O
implementations	O
of	O
the	O
Java	B-Device
Platform	I-Device
built	O
by	O
Sun	O
for	O
servers	O
and	O
workstations	O
,	O
Sun	O
does	O
not	O
provide	O
any	O
binaries	O
for	O
the	O
platforms	B-Device
of	O
JavaME	B-Language
targets	O
with	O
the	O
exception	O
of	O
an	O
MIDP	B-Language
1.0	O
JRE	B-Language
(	O
JVM	B-Language
)	O
for	O
Palm	O
OS	O
.	O
</s>
<s>
Sun	O
provides	O
no	O
J2ME	B-Language
JRE	B-Language
for	O
the	O
Microsoft	B-Operating_System
Windows	I-Operating_System
Mobile	I-Operating_System
(	O
Pocket	O
PC	O
)	O
based	O
devices	O
,	O
despite	O
an	O
open-letter	O
campaign	O
to	O
Sun	O
to	O
release	O
a	O
rumored	O
internal	O
implementation	O
of	O
PersonalJava	B-Language
known	O
by	O
the	O
code	O
name	O
"	O
Captain	O
America	O
"	O
.	O
</s>
<s>
Third	O
party	O
implementations	O
are	O
widely	O
used	O
by	O
Windows	B-Operating_System
Mobile	I-Operating_System
vendors	O
.	O
</s>
<s>
Operating	O
systems	O
targeting	O
Java	B-Language
ME	I-Language
have	O
been	O
implemented	O
by	O
DoCoMo	O
in	O
the	O
form	O
of	O
DoJa	B-Language
,	O
and	O
by	O
SavaJe	O
as	O
SavaJe	O
OS	O
.	O
</s>
<s>
The	O
open-source	O
Mika	B-Language
VM	I-Language
aims	O
to	O
implement	O
JavaME	B-Language
CDC/FP	O
,	O
but	O
is	O
not	O
certified	O
as	O
such	O
(	O
certified	O
implementations	O
are	O
required	O
to	O
charge	O
royalties	O
,	O
which	O
is	O
impractical	O
for	O
an	O
open-source	O
project	O
)	O
.	O
</s>
<s>
Consequently	O
,	O
devices	O
which	O
use	O
this	O
implementation	O
are	O
not	O
allowed	O
to	O
claim	O
JavaME	B-Language
CDC	O
compatibility	O
.	O
</s>
<s>
The	O
Linux-based	O
Android	B-Application
operating	I-Application
system	I-Application
uses	O
a	O
proprietary	O
version	O
of	O
Java	B-Device
that	O
is	O
similar	O
in	O
intent	O
,	O
but	O
very	O
different	O
in	O
many	O
ways	O
from	O
Java	B-Language
ME	I-Language
.	O
</s>
<s>
The	O
ESR	O
consortium	O
is	O
devoted	O
to	O
Standards	O
for	O
embedded	B-Language
Java	I-Language
.	O
</s>
<s>
ESR	O
#NameDescription	O
001B-ON	O
(	O
Beyond	O
CLDC	B-Language
)	O
B-ON	O
serves	O
as	O
a	O
very	O
robust	O
foundation	O
for	O
implementing	O
embedded	B-Language
Java	I-Language
software	O
.	O
</s>
<s>
It	O
specifies	O
a	O
reliable	O
initialization	O
phase	O
of	O
the	O
Java	B-Device
device	O
,	O
and	O
3	O
kind	O
of	O
objects	O
:	O
immutable	O
,	O
immortal	O
and	O
regular	O
(	O
mortal	O
)	O
objects	O
.	O
</s>
<s>
002MicroUIMicroUI	O
defines	O
an	O
enhanced	O
architecture	O
to	O
enable	O
an	O
open	O
,	O
third-party	O
,	O
application	O
development	O
environment	O
for	O
embedded	B-Architecture
HMI	O
devices	O
.	O
</s>
<s>
MWT	O
allows	O
a	O
binary	O
HMI	O
application	O
to	O
run	O
the	O
same	O
on	O
all	O
devices	O
that	O
provide	O
a	O
compliant	O
MWT	O
framework	O
(	O
embedded	B-Architecture
devices	I-Architecture
,	O
cellphones	O
,	O
set-top	O
box	O
TV	O
's	O
,	O
PC	O
's	O
,	O
etc	O
...	O
)	O
allowing	O
for	O
true	O
consistency	O
and	O
ubiquity	O
of	O
applications	O
across	O
product	O
lines	O
(	O
ME	O
,	O
SE	O
,	O
EE	O
)	O
.	O
</s>
<s>
015ECLASSPATHECLASSPATH	O
unifies	O
CLDC	B-Language
,	O
CDC	O
,	O
Foundation	O
,	O
SE	O
,	O
and	O
EE	O
execution	O
environments	O
with	O
a	O
set	O
of	O
around	O
300	O
classes	O
API	B-Application
.	O
</s>
<s>
Compiling	O
against	O
CLDC1.1/ECLASSPATH	O
makes	O
binary	O
code	O
portable	O
across	O
all	O
Java	B-Device
execution	O
environments	O
.	O
</s>
