<s>
The	O
Maxine	B-Language
virtual	I-Language
machine	I-Language
is	O
an	O
open	O
source	O
virtual	B-Architecture
machine	I-Architecture
that	O
is	O
developed	O
at	O
the	O
University	O
of	O
Manchester	O
.	O
</s>
<s>
It	O
was	O
formerly	O
developed	O
by	O
Sun	O
Microsystems	O
Laboratories	O
,	O
since	O
renamed	O
Oracle	B-Application
Labs	O
.	O
</s>
<s>
The	O
emphasis	O
in	O
Maxine	O
's	O
software	B-Architecture
architecture	I-Architecture
is	O
on	O
modular	O
design	O
and	O
code	O
reuse	O
for	O
flexibility	O
,	O
configurability	O
,	O
and	O
productivity	O
for	O
industrial	O
and	O
academic	O
virtual	B-Architecture
machine	I-Architecture
researchers	O
.	O
</s>
<s>
It	O
is	O
one	O
of	O
a	O
growing	O
number	O
of	O
Java	B-Language
virtual	I-Language
machines	I-Language
written	O
entirely	O
in	O
Java	B-Language
in	O
a	O
meta-circular	B-Application
style	O
.	O
</s>
<s>
Examples	O
include	O
Squawk	B-Language
and	O
Jikes	B-Language
RVM	I-Language
.	O
</s>
<s>
The	O
Maxine	B-Language
VM	I-Language
is	O
characterized	O
internally	O
by	O
aggressive	O
use	O
of	O
advanced	O
language	O
features	O
in	O
Java	B-Language
1.5	O
and	O
1.6	O
,	O
by	O
modular	O
subsystems	O
coordinated	O
through	O
Java	B-Language
interfaces	O
,	O
by	O
the	O
absence	O
of	O
an	O
interpreter	B-Application
,	O
and	O
by	O
a	O
tightly	O
coupled	O
debugger	O
and	O
visualization	O
tool	O
for	O
VM	O
development	O
.	O
</s>
<s>
Maxine	O
is	O
plug	B-Device
compatible	I-Device
with	O
an	O
unmodified	O
Java	B-Language
Development	I-Language
Kit	I-Language
(	O
JDK	B-Language
)	O
.	O
</s>
<s>
Maxine	O
can	O
be	O
developed	O
,	O
built	O
,	O
and	O
run	O
in	O
standard	O
Java	B-Language
integrated	B-Application
development	I-Application
environments	I-Application
(	O
IDEs	O
)	O
,	O
including	O
NetBeans	B-Application
,	O
Eclipse	B-Application
,	O
and	O
IntelliJ	B-Language
IDEA	I-Language
.	O
</s>
<s>
A	O
secondary	O
goal	O
of	O
the	O
project	O
is	O
to	O
develop	O
methods	O
and	O
tools	O
for	O
"	O
systems	O
programming	O
in	O
Java	B-Language
"	O
.	O
</s>
<s>
Compiler	B-Language
extensions	O
,	O
configured	O
in	O
VM	O
source	O
code	O
using	O
Java	B-Language
annotations	I-Language
,	O
allow	O
use	O
,	O
with	O
no	O
performance	O
penalty	O
,	O
of	O
low-level	O
operations	O
otherwise	O
disallowed	O
in	O
Java	B-Language
.	O
</s>
<s>
These	O
extensions	O
provided	O
the	O
foundation	O
for	O
the	O
Graal	B-Language
compiler	I-Language
.	O
</s>
<s>
Specialized	O
debugging	O
support	O
for	O
the	O
Maxine	B-Language
VM	I-Language
is	O
provided	O
by	O
the	O
Maxine	O
Inspector	O
:	O
a	O
companion	O
tool	O
that	O
acts	O
as	O
a	O
combined	O
object	O
,	O
class	O
,	O
and	O
method	O
browser	O
,	O
and	O
as	O
a	O
machine	O
-	O
and	O
bytecode-level	O
debugger	O
.	O
</s>
<s>
Doug	O
Simon	O
continued	O
in	O
this	O
role	O
throughout	O
the	O
acquisition	O
of	O
Sun	O
by	O
Oracle	B-Application
Corporation	I-Application
.	O
</s>
<s>
Michael	O
Van	O
De	O
Vanter	O
assumed	O
development	O
of	O
the	O
Inspector	O
in	O
2007	O
,	O
adding	O
dynamic	O
support	O
as	O
the	O
VM	O
became	O
executable	O
and	O
continued	O
to	O
evolve	O
throughout	O
the	O
acquisition	O
of	O
Sun	O
by	O
Oracle	B-Application
Corporation	I-Application
.	O
</s>
<s>
Oracle	B-Application
continued	O
development	O
of	O
Maxine	O
until	O
the	O
release	O
of	O
Maxine	O
2.0	O
.	O
</s>
