<s>
JamVM	B-Language
is	O
an	O
open-source	B-Application
Java	B-Language
Virtual	I-Language
Machine	I-Language
(	O
JVM	B-Language
)	O
developed	O
to	O
be	O
extremely	O
small	O
compared	O
with	O
other	O
virtual	B-Architecture
machines	I-Architecture
(	O
VMs	O
)	O
while	O
conforming	O
to	O
the	O
Java	B-Language
virtual	I-Language
machine	I-Language
specification	I-Language
version	O
2	O
(	O
blue	O
book	O
)	O
.	O
</s>
<s>
JamVM	B-Language
can	O
be	O
configured	O
to	O
use	O
the	O
GNU	B-Language
Classpath	I-Language
or	O
the	O
OpenJDK	B-Language
Java	B-Language
class	O
library	O
and	O
recent	O
versions	O
support	O
object	O
finalization	O
,	O
Soft/Weak/Phantom	O
References	O
,	O
the	O
Java	B-Language
Native	I-Language
Interface	I-Language
(	O
JNI	B-Language
)	O
and	O
the	O
Reflection	O
API	O
.	O
</s>
<s>
JamVM	B-Language
currently	O
supports	O
the	O
CPUs	B-General_Concept
:	O
AMD64	B-Device
,	O
ARM	B-Architecture
,	O
x86	B-Operating_System
,	O
MIPS	B-Device
,	O
PowerPC	B-Architecture
and	O
SPARC	B-Architecture
.	O
</s>
<s>
The	O
OpenJDK	B-Language
compatible	O
version	O
of	O
JamVM	B-Language
is	O
supported	O
by	O
IcedTea	B-Language
,	O
and	O
IcedTea	B-Language
packages	O
of	O
JamVM	B-Language
are	O
included	O
in	O
both	O
Debian	O
and	O
Ubuntu	B-Operating_System
.	O
</s>
<s>
This	O
enables	O
JamVM	B-Language
to	O
be	O
installed	O
as	O
an	O
alternative	O
Java	B-Language
Virtual	I-Language
Machine	I-Language
to	O
hotspot	O
when	O
using	O
OpenJDK	B-Language
.	O
</s>
<s>
When	O
using	O
Ubuntu	B-Operating_System
on	O
ARM	B-Architecture
,	O
JamVM	B-Language
was	O
the	O
default	O
VM	O
.	O
</s>
<s>
In	O
2006	O
,	O
JamVM	B-Language
was	O
used	O
by	O
Google	B-Application
's	I-Application
Android	I-Application
team	O
during	O
development	O
of	O
the	O
application	O
framework	O
.	O
</s>
<s>
The	O
eventual	O
Android	B-Application
successor	O
,	O
Dalvik	B-Application
,	O
was	O
under	O
development	O
at	O
this	O
time	O
,	O
and	O
at	O
the	O
start	O
of	O
2007	O
the	O
two	O
were	O
interchangeable	O
.	O
</s>
<s>
A	O
few	O
months	O
later	O
,	O
Dalvik	B-Application
was	O
established	O
as	O
the	O
primary	O
Android	B-Application
virtual	B-Architecture
machine	I-Architecture
and	O
JamVM	B-Language
was	O
disabled	O
.	O
</s>
