java Graphics2D problem

[jenny wang]

I create an Image using JAVA Graphics2D API.
The code is running well in Windows. But I got the following error in UNIX server. It seems that it has trouble with X11 window. Anybody knows how to solve this problem?
Thanks in advance!
jenny
Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:59)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:120)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:58)
at java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1011)

[Mike Curwen]

I'm moving this to the "Other Java APIs" forum. http://www.javaranch.com/ubb/Forum45/HTML/000243.html

[Thomas Paul]

The problem is that you need an X server hooked up to the Unix box. Then you need to set the DISPLAY variable. You should be doing something like:
set DISPLAY=hostname:0.0
where hostname is the name of the machine on which the X server is running. If it is the same machine as you are running on then it will be the uname of your machine.