Use JFreeChart in a servlet (without display)

[Stephane Levant]

I have a problem with JFreeChart in a servlet :
the servlet servor is running on a secure host without X servor.
I have the message "Can't connect to X11 window server"
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
...
at com.jrefinery.chart.JFreeChart.createVerticalBarChart
...

It is possible to use JFreeChart without X access ?

[timp]

Yes,
you can use jfreechart without X, use the Pure Java AWT
(pja) see http://www.eteks.com/

cheers
timp

[timp]

Yes,
you can use jfreechart without X, use the Pure Java AWT
(pja) see http://www.eteks.com/

cheers
timp

[Matthew Parrish]

Is there a performance hit to use the pja?

Thanks,
Matthew

[Stephane Levant]

Thanks, it's work fine.

It should be in the documentation (but perhaps it is already ?).

[Chris Lukas]

If you're concerned with licensing (and PJA is GPL not LGPL)
you can run Xvfb -- an X virtual frame buffer which exists for numerous platforms. Xvfb is essentially a monitor-less X server. You can do things like "xterm" and it starts up with the xterm displaying nowhere.

This works fine with the jfreechart lib for me.

- Chris

[Lance Weber]

This issue is also addressed in the Java2D FAQ. Basically, the new jdk1.4 handles this problem with a new 'headless' system property setting.

http://java.sun.com/products/java-media ... .html#xvfb