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ava.lang.NullPointerException: 	at org.eclipse.swt.widgets.TabFolder.gtk_switch_page(TabFolder.java:570)	at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2009)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4723)	at org.eclipse.swt.internal.gtk.OS._gtk_widget_show(Native Method)	at org.eclipse.swt.internal.gtk.OS.gtk_widget_show(OS.java:14774)	at org.eclipse.swt.widgets.TabFolder.createItem(TabFolder.java:311)	at org.eclipse.swt.widgets.TabItem.createWidget(TabItem.java:123)	at org.eclipse.swt.widgets.TabItem.(TabItem.java:75)	at org.eclipse.jdt.internal.ui.wizards.buildpaths.BuildPathsBlock.createControl(BuildPathsBlock.java:228)	at org.eclipse.jdt.ui.wizards.JavaCapabilityConfigurationPage.createControl(JavaCapabilityConfigurationPage.java:162)	at org.eclipse.jface.wizard.Wizard.createPageControls(Wizard.java:175)	at org.eclipse.jface.wizard.WizardDialog.createPageControls(WizardDialog.java:705)	at org.eclipse.jface.wizard.WizardDialog.setWizard(WizardDialog.java:1153)	at org.eclipse.jface.wizard.WizardDialog.updateForPage(WizardDialog.java:1211)	at org.eclipse.jface.wizard.WizardDialog.access$4(WizardDialog.java:1208)	at org.eclipse.jface.wizard.WizardDialog$8.run(WizardDialog.java:1197)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.jface.wizard.WizardDialog.showPage(WizardDialog.java:1194)	at org.eclipse.ui.internal.dialogs.NewWizardSelectionPage.advanceToNextPageOrFinish(NewWizardSelectionPage.java:71)	at org.eclipse.ui.internal.dialogs.NewWizardNewPage$1.doubleClick(NewWizardNewPage.java:361)	at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:832)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)	at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:829)	at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1470)	at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1263)	at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:252)	at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:249)	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:311)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4481)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1329)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3819)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3430)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:827)	at org.eclipse.jface.window.Window.open(Window.java:803)	at org.eclipse.ui.actions.NewProjectAction.run(NewProjectAction.java:115)	at org.eclipse.jface.action.Action.runWithEvent(Action.java:473)	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:595)	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:511)	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:420)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4481)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1329)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3819)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3430)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)	at org.eclipse.equinox.launcher.Main.run(Main.java:1515)	at org.eclipse.equinox.launcher.Main.main(Main.java:1488)