尝试了多款反编译插件（JadClipse，JD， Enhanced Class Decompiler JD-Core Extension 都尝试了，反应相同），打开外部项目中的class时均显示要反编译的项目不存在
应该不是项目本身的问题，更换文件仍然显示does not exist。
在另一台电脑上用eclipse相同的插件反编译相同的文件，成功。
推测是插件或者eclipse上出现了问题
引入任何一个外部简单的项目打开里面的class都会提示xxx does not exist
直接打开class，新窗口闪退
而对于已有的项目中，打开其library中的class无故障
希望指条明路，感谢各位大侠
貌似国内网站很难找到这类问题，在
https://stackoverflow.com/questions/3438704
找到一个报错类似，但产生原因不同的问题
报错：
Java Model Exception: Java Model Status [AttributesEditor does not exist]
at org.eclipse.jdt.internal.core.AbstractClassFile.getBuffer(AbstractClassFile.java:228)
at org.eclipse.jdt.internal.core.AbstractClassFile.getSource(AbstractClassFile.java:336)
at org.sf.feeling.decompiler.editor.JavaDecompilerClassFileEditor.doOpenBuffer(JavaDecompilerClassFileEditor.java:164)
at org.sf.feeling.decompiler.editor.JavaDecompilerClassFileEditor.doOpenBuffer(JavaDecompilerClassFileEditor.java:148)
at org.sf.feeling.decompiler.editor.JavaDecompilerClassFileEditor.doOpenBuffer(JavaDecompilerClassFileEditor.java:140)
at org.sf.feeling.decompiler.editor.JavaDecompilerClassFileEditor.doSetInput(JavaDecompilerClassFileEditor.java:472)
at org.eclipse.ui.texteditor.AbstractTextEditor.lambda$1(AbstractTextEditor.java:3136)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:438)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:354)
at org.eclipse.ui.internal.WorkbenchWindow.lambda$4(WorkbenchWindow.java:2249)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2247)
at org.eclipse.ui.texteditor.AbstractTextEditor.internalInit(AbstractTextEditor.java:3153)
at org.eclipse.ui.texteditor.AbstractTextEditor.init(AbstractTextEditor.java:3178)
at org.eclipse.ui.internal.EditorReference.initialize(EditorReference.java:365)
at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:345)
at sun.reflect.GeneratedMethodAccessor56.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:1001)
at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:966)
at org.eclipse.e4.core.internal.di.InjectorImpl.internalInject(InjectorImpl.java:139)
at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:411)
at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:333)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:202)
at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:91)
at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:60)
at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:42)
at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:132)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:1015)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:675)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:781)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:752)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:746)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:730)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:107)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:147)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4580)
at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:219)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205)
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203)
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:233)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:132)
at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75)
at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44)
at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:177)
at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:652)
at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:616)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:791)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:404)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1240)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3317)
at org.eclipse.ui.internal.WorkbenchPage.lambda$9(WorkbenchPage.java:3216)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3213)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3177)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3167)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:376)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:182)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:287)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:252)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:274)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:252)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:382)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:554)
at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:49)
at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:853)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:850)
at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1165)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:277)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:272)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:312)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4131)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1055)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3944)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3547)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:566)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
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:661)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597)
at org.eclipse.equinox.launcher.Main.run(Main.java:1476)
