Java Virtual Machine with GUI in embedded environment

Hi all,

I need to evaluate the possibility to use a Java Virtual Machine
in an embedded environment (it will be a MIPS processor, 400MHz,
with a graphical LCD 800x600)

I will need to implement a GUI in this environment.

I successfullty installed kaffe with AWT graphical library: swing
would be better, but AWT can go :-)

the problem is that the resulting application is too slow.

To your knowledge, which a more efficient JVM (with graphical
library?)
I installed gcj, but I have not the graphical libs, or I saw SableVM,
which is said to be efficient, but misses the graphical library
(ha an old and buggy version of swing)

Any experience in this field?

thank
giammy

--
Gianluca Moro          http://groups.yahoo.com/group/embeddeditalia/
ISCRIVITI alla         Mailing List Italiana su LINUX EMBEDDED
giangiammy@gmail.com   Visit http://www.giammy.com

"giangiammy" <giangiammy@gmail.com> wrote in message 
news:1159948469.925399.272240@m73g2000cwd.googlegroups.com...
> Hi all,
>
> I need to evaluate the possibility to use a Java Virtual Machine
> in an embedded environment (it will be a MIPS processor, 400MHz,
> with a graphical LCD 800x600)
>
> I will need to implement a GUI in this environment.
>
> I successfullty installed kaffe with AWT graphical library: swing
> would be better, but AWT can go :-)
>
> the problem is that the resulting application is too slow.
>
> To your knowledge, which a more efficient JVM (with graphical
> library?)
> I installed gcj, but I have not the graphical libs, or I saw SableVM,
> which is said to be efficient, but misses the graphical library
> (ha an old and buggy version of swing)
>
> Any experience in this field?
>
> thank
> giammy
>
> --
> Gianluca Moro          http://groups.yahoo.com/group/embeddeditalia/
> ISCRIVITI alla         Mailing List Italiana su LINUX EMBEDDED
> giangiammy@gmail.com   Visit http://www.giammy.com
>

Java, too slow?  Never heard of such a thing. Although, I reluctantly admit 
hearing that ARM cores with Jazelle perform quite well.

Scott
(Java cynics unite)

giangiammy wrote:

> I need to evaluate the possibility to use a Java Virtual Machine
> in an embedded environment

The trick is to do the JIT on the PC and only download native code to
the device. Look for a native cross-compiler.

This is somewhat useful:

http://java.sun.com/products/personaljava/w3mulc.pdf

There's an open source JVM for Arm devices, but it hasn't been updated
in years and is quite bug-infested.

The trick is to use no JVM at all on the embedded device. Keep the byte
codes on the PC.

Eric