Greg and Stephen,
Thank you for your quick help. It works if I run the application as
follows;
java -Djava.awt.headless=true genGridNew
The link below was very helpful..
In case someone else has similar problem, I connect to mac using ssh
from my Linux (redhat9) box. I set the display correctly (export
DISPLAY=...0.0 using bash shell) and run xhost from my local box. I
run some other graphical utilities so I am sure that the display was
set up correctly.
The DISPLAY is only used for X11 applications such as xterm, xclock,
etc. On the Mac, java does *not* use X11. It uses the native Aqua
graphics, so no matter what you do to the DISPLAY it will not help. It
is not possible to run Aqua applications remotely.
I believe NeXT had a way of running applications remotely, but Mac OS X
does not (yet?)
If I go to a different machine (windows box) and ssh to my linux box
and run this application, it runs fine. I don't even have to play
with the display settings. It is only a problem if I run it on mac.
On Linux, java uses X11 for graphics, so in this case it works. You do
not need to play with the display settings because you used the "-X"
option on ssh, which takes care of everything for you.
I am not sure what "headles" session means in this context but I will
keep reading the link below. For now it works with
"-Djava.awt.headless=true".
The term "head" comes from
"Head" means a display. A "headless" server has no display connected.
By specifying "-Djava.awt.headless=true" you are telling java that you
are not doing anything that requires a display.
So it does not try to initialise the graphics, and therefore works.
--
Rohan Lloyd
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