To be clear, i'm a brand new newbies in java programming, i just try
to follow android coding tutorials. and i got already a problem !

I follow this tuto : http://developer.android.com/guide/tutorials/hello-world.html

And everything run fine, but since i try to use the XML layout
problems begins. I can't run the application, i can't event view the
layout\main.xml in eclipse,  i got this error

java.lang.NoClassDefFoundError: Could not initialize class
sun.awt.X11.XToolkit
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:169)
    at java.awt.Toolkit$2.run(Toolkit.java:834)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:826)
    at android.graphics.Paint.updateFontObject(Paint.java:264)
    at android.graphics.Paint.initFont(Paint.java:241)
    at android.graphics.Paint.<init>(Paint.java:213)
    at android.graphics.Paint.<init>(Paint.java:208)
    at android.view.ViewGroup.<init>(ViewGroup.java:276)
    at android.widget.FrameLayout.<init>(FrameLayout.java:75)
    at com.android.layoutlib.bridge.Bridge.computeLayout(Bridge.java:
394)
    at
com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEdi tor.computeLayout(Unknown
Source)
    at
com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEdi tor.recomputeLayout(Unknown
Source)
    at
com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEdi tor.onConfigurationChange(Unknown
Source)
    at
com.android.ide.eclipse.adt.internal.editors.layout.configuration.Configura tionComposite.onDeviceConfigChange(Unknown
Source)
    at
com.android.ide.eclipse.adt.internal.editors.layout.configuration.Configura tionComposite.onDeviceChange(Unknown
Source)
    at
com.android.ide.eclipse.adt.internal.editors.layout.configuration.Configura tionComposite.access
$2(Unknown Source)
    at
com.android.ide.eclipse.adt.internal.editors.layout.configuration.Configura tionComposite
$2.widgetSelected(Unknown Source)
    at
org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:
228)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:
84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1176)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:
3493)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:
3112)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:
2405)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
    at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:
332)
    at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:
493)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:
149)
    at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication .java:
113)
    at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java :
194)
    at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication (EclipseAppLauncher.java:
110)
    at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseA ppLauncher.java:
79)
    at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:
368)
    at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:
179)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp l.java:
25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:
559)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1311)

Hope someone could help me. I use a ubuntu 10.4 workstation and
eclipse galileo, my display variable is : ":0.0"

Bye