我是开发RCP应用程序的新手。我正在尝试执行在RCP中使用插件构建的应用程序。当我尝试运行应用程序时，它会给我以下空指针异常。我无法理解我的代码在哪里破解或在哪里寻找解决此异常。有人可以帮忙吗？应用程序无法使用java 1.7或1.8执行。先感谢您。
!ENTRY org.eclipse.ui 4 0 2014-12-19 16:29:26.893
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NullPointerException
at org.eclipse.ui.internal.actions.CommandAction.init(CommandAction.java:201)
at org.eclipse.ui.internal.actions.CommandAction.<init>(CommandAction.java:86)
at org.eclipse.ui.internal.actions.CommandAction.<init>(CommandAction.java:65)
at org.eclipse.ui.actions.ActionFactory$WorkbenchCommandAction.<init>(ActionFactory.java:77)
at org.eclipse.ui.actions.ActionFactory$64.create(ActionFactory.java:1750)
at org.eclipse.ui.internal.presentations.util.StandardEditorSystemMenu.<init>(StandardEditorSystemMenu.java:44)
at org.eclipse.ui.presentations.WorkbenchPresentationFactory.createEditorPresentation(WorkbenchPresentationFactory.java:78)
at org.eclipse.ui.internal.presentations.PresentationFactoryUtil.createPresentation(PresentationFactoryUtil.java:42)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:567)
at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:568)
at org.eclipse.ui.internal.EditorSashContainer.createControl(EditorSashContainer.java:531)
at org.eclipse.ui.internal.EditorAreaHelper.<init>(EditorAreaHelper.java:41)
at org.eclipse.ui.internal.WorkbenchPage.init(WorkbenchPage.java:2507)
at org.eclipse.ui.internal.WorkbenchPage.<init>(WorkbenchPage.java:637)
at org.eclipse.ui.internal.tweaklets.Workbench3xImplementation.createWorkbenchPage(Workbench3xImplementation.java:39)
at org.eclipse.ui.internal.WorkbenchWindow.busyOpenPage(WorkbenchWindow.java:796)
at org.eclipse.ui.internal.Workbench$23.runWithException(Workbench.java:1224)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
at org.eclipse.ui.internal.Workbench$33.runWithException(Workbench.java:1595)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at com.sequenom.typerdx.application.Application$1.run(Application.java:83)
at com.sequenom.typerdx.application.Application$1.run(Application.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at com.sequenom.typerdx.application.Application.login(Application.java:114)
at com.sequenom.typerdx.application.Application.start(Application.java:204)
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:344)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
19 Dec 2014 16:29:27,096 [ERROR] com.packagename.ApplicationWorkbenchAdvisor: java.lang.NullPointerException
19 Dec 2014 16:29:27,127 [ERROR] com.packagename.ServicesActivator$2: Sleep thread interrupted. sleep interrupted