错误如下：
org.eclipse.swt.SWTError: No more handles
at org.eclipse.swt.SWT.error(SWT.java:4423)
at org.eclipse.swt.SWT.error(SWT.java:4312)
at org.eclipse.swt.SWT.error(SWT.java:4283)
at org.eclipse.swt.widgets.Widget.error(Widget.java:472)
at org.eclipse.swt.widgets.Control.createHandle(Control.java:704)
at org.eclipse.swt.widgets.Label.createHandle(Label.java:199)
at org.eclipse.swt.widgets.Control.createWidget(Control.java:744)
at org.eclipse.swt.widgets.Control.(Control.java:112)
at org.eclipse.swt.widgets.Label.(Label.java:101)
at org.eclipse.ui.texteditor.StatusLineContributionItem.fill(StatusLineContributionItem.java:182)
at org.eclipse.jface.action.SubContributionItem.fill(SubContributionItem.java:59)
at org.eclipse.jface.action.StatusLineManager.update(StatusLineManager.java:327)
at org.eclipse.ui.internal.WorkbenchWindow.updateActionBars(WorkbenchWindow.java:1988)
at org.eclipse.ui.internal.WWinActionBars.updateActionBars(WWinActionBars.java:113)
at org.eclipse.ui.SubActionBars.updateActionBars(SubActionBars.java:611)
at org.ccdt.dltk.ui.actions.GenerateActionGroup.setGlobalActionHandlers(GenerateActionGroup.java:270)
at org.ccdt.dltk.ui.actions.GenerateActionGroup.fillActionBars(GenerateActionGroup.java:181)
at org.ccdt.dltk.internal.ui.actions.CompositeActionGroup.fillActionBars(CompositeActionGroup.java:63)
at org.ccdt.dltk.internal.ui.editor.BasicScriptEditorActionContributor.setActiveEditor(BasicScriptEditorActionContributor.java:195)
at org.ccdt.dltk.internal.ui.editor.BasicSourceModuleEditorActionContributor.setActiveEditor(BasicSourceModuleEditorActionContributor.java:139)
at org.ccdt.dltk.internal.ui.editor.SourceModuleEditorActionContributor.setActiveEditor(SourceModuleEditorActionContributor.java:62)
at org.eclipse.ui.internal.EditorActionBars.partChanged(EditorActionBars.java:342)
at org.eclipse.ui.internal.WorkbenchPage.updateActivations(WorkbenchPage.java:282)
at org.eclipse.ui.internal.WorkbenchPage.access$15(WorkbenchPage.java:264)
at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:193)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$2.run(PartServiceImpl.java:192)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:190)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:609)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:553)
at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:104)
at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent(ContributedPartRenderer.java:59)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1081)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1453)
at org.eclipse.swt.widgets.Shell.WM_MOUSEACTIVATE(Shell.java:2334)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4655)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2075)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4706)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4990)
at org.eclipse.swt.internal.win32.OS.PeekMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:3141)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
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:483)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
到底是怎么回事呢，很容易就出现了！还有一大堆的warning