android sdk installation with ubuntu 11.10 error..

ava.awt.HeadlessException
         at sun.awt.HeadlessToolkit.getScreenResolution(HeadlessToolkit.java:
 221)
         at
 com.android.sdkuilib.internal.widgets.AvdStartDialog.getMonitorDpi(AvdStartDialog.java:
 420)
         at
 com.android.sdkuilib.internal.widgets.AvdStartDialog.createDialogContent(AvdStartDialog.java:
 179)
         at
 com.android.sdkuilib.ui.GridDialog.createDialogArea(GridDialog.java:
 76)
         at org.eclipse.jface.dialogs.Dialog.createContents(Dialog.java:760)
         at org.eclipse.jface.window.Window.create(Window.java:431)
         at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1089)
         at org.eclipse.jface.window.Window.open(Window.java:790)
         at
 com.android.sdkuilib.internal.widgets.AvdSelector.onStart(AvdSelector.java:
 1035)
         at com.android.sdkuilib.internal.widgets.AvdSelector.access
 $600(AvdSelector.java:76)
         at com.android.sdkuilib.internal.widgets.AvdSelector
 $7.widgetSelected(AvdSelector.java:317)
         at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
         at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
         at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
         at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
         at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
         at
 com.android.sdkuilib.internal.repository.sdkman2.SdkUpdaterWindowImpl2.open(SdkUpdaterWindowImpl2.java:
 158)
         at
 com.android.sdkuilib.repository.SdkUpdaterWindow.open(SdkUpdaterWindow.java:
 154)
         at com.android.sdkmanager.Main.showSdkManagerWindow(Main.java:335)
         at com.android.sdkmanager.Main.doAction(Main.java:307)
         at com.android.sdkmanager.Main.run(Main.java:119)
         at com.android.sdkmanager.Main.main(Main.java:102)