java.awt.HeadlessException when trying to run reprap

Hey everyone. I am trying to get the software setup on 64-bit Ubuntu

I installed Sun-java and followed the directions to install native 64-bit rxtx and java3d libraries.

I did chmod 755 reprap

The libraries are showing up in the directories below:

/usr/lib/jni/libj3dcore-ogl.so

/usr/lib/librxtxSerial.so

I get the following output when I run ./reprap

MachineFactory.create() failed.
java.awt.HeadlessException
Exception in thread "RepRap" java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:173)
at java.awt.Window.(Window.java:437)
at java.awt.Frame.(Frame.java:419)
at java.awt.Frame.(Frame.java:384)
at javax.swing.SwingUtilities$SharedOwnerFrame.(SwingUtilities.java:1758)
at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1835)
at javax.swing.JOptionPane.getRootFrame(JOptionPane.java:1692)
at javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:864)
at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:668)
at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:639)
at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:610)
at org.reprap.Main$12.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:602)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)


I know this is normally a problem if you are running without a monitor, mouse or keyboard. I have searched around a bit and I'm not sure what could be causing it. I have the Gnome desktop. I even unplugged my USB mouse and used the older PS2 style but I'm not sure where to go from here.

Thanks

Solved the problem. When I checked my version of Java:

Quote

java -version

it showed Open JDK as the default even though java-6-sun was installed

I typed:

Quote

sudo update-alternatives --config java

I selected java-6-sun

I then received a bunch of errors for no rxtxSerial in java.library.path

I uninstalled and reinstalled and relinked to the libj3dcore-ogl.so and librxtxSerial.so libraries as shown on the installation page on the Wiki and it's now working!

AFAIK, the packages are tested with OpenJDK, so they should work. Interesting that they are broken.