java.lang.ClassCastException: rcp_demo.Views.CategoryView cannot be cast to org.eclipse.ui.IViewPart

Stack Overflow | Zala Bharat | 3 months ago
tip
Your exception is missing from the Samebug knowledge base.
Here are the best solutions we found on the Internet.
Click on the to mark the helpful solution and get rewards for you help.
  1. 0

    Plug-in was unable to instantiate class

    Stack Overflow | 2 years ago | G. Adela
    java.lang.InstantiationException: org.xtext.refsys.views.featureEdit.FeatureEdit
  2. 0

    NullPointerException when starting Eclipse with open Snippets View

    Eclipse Bugzilla | 3 years ago | johannes.dorn
    java.lang.NullPointerException
  3. 0

    Views cannot be cast to org.eclipse.ui.IViewPart using RCP eclipse

    Stack Overflow | 3 months ago | Zala Bharat
    java.lang.ClassCastException: rcp_demo.Views.CategoryView cannot be cast to org.eclipse.ui.IViewPart
  4. Speed up your debug routine!

    Automated exception search integrated into your IDE

  5. 0

    Plug-in org.jboss.tools.asciidoctor.ui was unable to load class org.jboss.tools.asciidoctor.ui.AsciidoctorView.

    GitHub | 2 years ago | paulvi
    org.eclipse.core.runtime.CoreException: Plug-in org.jboss.tools.asciidoctor.ui was unable to load class org.jboss.tools.asciidoctor.ui.AsciidoctorView.
  6. 0

    Executable extension definition for "class" not found. - 从这里起航 - 博客频道 - CSDN.NET

    csdn.net | 7 months ago
    org.eclipse.core.runtime.CoreException: Executable extension definition for "class" not found.

    Not finding the right solution?
    Take a tour to get the most out of Samebug.

    Tired of useless tips?

    Automated exception search integrated into your IDE

    Root Cause Analysis

    1. java.lang.ClassCastException

      rcp_demo.Views.CategoryView cannot be cast to org.eclipse.ui.IViewPart

      at org.eclipse.ui.internal.registry.ViewDescriptor.createView()
    2. Workbench
      ViewDescriptor.createView
      1. org.eclipse.ui.internal.registry.ViewDescriptor.createView(ViewDescriptor.java:63)
      1 frame
    3. Eclipse UI
      ViewReference.createPart
      1. org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:108)
      1 frame
    4. org.eclipse.ui
      CompatibilityPart.create
      1. org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPart(CompatibilityPart.java:265)
      2. org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:303)
      2 frames
    5. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      4. java.lang.reflect.Method.invoke(Unknown Source)
      4 frames
    6. org.eclipse.e4
      ContextInjectionFactory.make
      1. org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
      2. org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:888)
      3. org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:869)
      4. org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:120)
      5. org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:337)
      6. org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:258)
      7. org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:162)
      7 frames
    7. Eclipse Workbench
      ReflectionContributionFactory.create
      1. org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:104)
      2. org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:73)
      3. org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:55)
      3 frames
    8. org.eclipse.e4
      ContributedPartRenderer.createWidget
      1. org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:127)
      1 frame
    9. Eclipse Workbench SWT
      PartRenderingEngine$6.run
      1. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:983)
      2. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:662)
      3. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$6.run(PartRenderingEngine.java:547)
      3 frames
    10. Eclipse Core
      SafeRunner.run
      1. org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
      1 frame
    11. Eclipse Workbench SWT
      PartRenderingEngine.createGui
      1. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:531)
      1 frame
    12. org.eclipse.e4
      ElementReferenceRenderer.createWidget
      1. org.eclipse.e4.ui.workbench.renderers.swt.ElementReferenceRenderer.createWidget(ElementReferenceRenderer.java:69)
      1 frame
    13. Eclipse Workbench SWT
      PartRenderingEngine$7.run
      1. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:983)
      2. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:662)
      3. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)
      4. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)
      5. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)
      5 frames
    14. Eclipse Core
      SafeRunner.run
      1. org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
      1 frame
    15. Eclipse Workbench SWT
      PartRenderingEngine.createGui
      1. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)
      1 frame
    16. Eclipse Workbench
      PartServiceImpl$1.handleEvent
      1. org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:100)
      1 frame
    17. org.eclipse.e4
      UIEventHandler$1.run
      1. org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:40)
      1 frame
    18. RWT
      Synchronizer.syncExec
      1. org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:187)
      1 frame
    19. Eclipse UI
      UISynchronizer.syncExec
      1. org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:156)
      1 frame
    20. RWT
      Display.syncExec
      1. org.eclipse.swt.widgets.Display.syncExec(Display.java:4734)
      1 frame
    21. Eclipse Workbench SWT
      E4Application$1.syncExec
      1. org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:218)
      1 frame
    22. org.eclipse.e4
      UIEventHandler.handleEvent
      1. org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:36)
      1 frame
    23. org.eclipse.equinox
      EventHandlerTracker.dispatchEvent
      1. org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197)
      2. org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197)
      3. org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
      3 frames
    24. Eclipse OSGi
      ListenerQueue.dispatchEventSynchronous
      1. org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
      2. org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
      2 frames
    25. org.eclipse.equinox
      EventComponent.sendEvent
      1. org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135)
      2. org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78)
      3. org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39)
      3 frames
    26. org.eclipse.e4
      EventBroker.send
      1. org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:81)
      1 frame
    27. Eclipse Workbench
      UIEventPublisher.notifyChanged
      1. org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:59)
      1 frame
    28. org.eclipse.emf.common
      BasicNotifierImpl.eNotify
      1. org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:374)
      1 frame
    29. org.eclipse.e4
      StackRenderer$10.widgetSelected
      1. org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:171)
      2. org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer$10.widgetSelected(StackRenderer.java:1031)
      2 frames
    30. RWT
      Display.readAndDispatch
      1. org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
      2. org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      3. org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
      4. org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
      5. org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085)
      6. org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1070)
      7. org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:782)
      8. org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3110)
      9. org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1794)
      10. org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:283)
      11. org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      12. org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
      13. org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
      14. org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172)
      15. org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
      15 frames
    31. Eclipse Workbench SWT
      PartRenderingEngine$9.run
      1. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
      1 frame
    32. Databinding
      Realm.runWithDefault
      1. org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      1 frame
    33. Eclipse Workbench SWT
      PartRenderingEngine.run
      1. org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
      1 frame
    34. Eclipse Workbench
      E4Workbench.createAndRunUI
      1. org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
      1 frame
    35. Eclipse UI
      Workbench$5.run
      1. org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
      1 frame
    36. Databinding
      Realm.runWithDefault
      1. org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      1 frame
    37. Eclipse UI
      Workbench.createAndRunWorkbench
      1. org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
      1 frame
    38. Eclipse UI
      PlatformUI.createAndRunWorkbench
      1. org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
      1 frame
    39. rcp_demo
      Application.start
      1. rcp_demo.Application.start(Application.java:20)
      1 frame
    40. Equinox Container
      EclipseAppHandle.run
      1. org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
      1 frame
    41. Eclipse OSGi
      EclipseStarter.run
      1. org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
      2. org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
      3. org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
      4. org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
      4 frames
    42. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      4. java.lang.reflect.Method.invoke(Unknown Source)
      4 frames
    43. Equinox
      Main.main
      1. org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
      2. org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
      3. org.eclipse.equinox.launcher.Main.run(Main.java:1465)
      4. org.eclipse.equinox.launcher.Main.main(Main.java:1438)
      4 frames