When updated to the latest version, bad things happened

[yalongy]

Eclipse IDE Version: 2022-03 (4.23.0) Build id: 20220310-1457

Scene：Update in Eclipse Market

then step 1,create a JFrame

` public class TTT extends JFrame {

private static final long serialVersionUID = 1L;
private JPanel contentPane;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                TTT frame = new TTT();
                frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 * Create the frame.
 */
public TTT() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 450, 300);
    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

    setContentPane(contentPane);
}

} `

step 2,open with windowbuilder - design
step3,where is my frame? frame can not display normally

[ptziegler]

The code itself looks fine and I can open it just fine with the editor, so I assume that there is something wrong with the project itself.

Does the Java class contain compile errors? Can you provide a screenshot of the Eclipse IDE or at least the problem view? Because right now I'm suspecting this to be already resolved by #623

[yalongy]

There is no other plugin updated in Eclipse , only WindowBuilder plugin

here is msg tip when clicking 'design' after opened with WindowBuilder Editor Plugin :

`Internal Error

WindowBuilder encountered unexpected internal error.

This could be caused by a WindowBuilder bug or by a misconfiguration issue, conflict, partial update, etc.

org.eclipse.core.runtime.CoreException: Plug-in "org.eclipse.wb.xwt" was unable to instantiate class "org.eclipse.wb.internal.xwt.gefTree.EditPartFactory".

Hide stack trace. Stack trace:

java.lang.ClassNotFoundException: com.google.common.collect.ImmutableList cannot be found by org.eclipse.wb.xwt_1.9.1.202203170939 at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:529) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:524) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at org.eclipse.wb.internal.xwt.gefTree.EditPartFactory.(EditPartFactory.java:27) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:204) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:920) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:246) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:63) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.lambda$1(ExternalFactoriesHelper.java:183) at org.eclipse.wb.internal.core.utils.execution.ExecutionUtils.runObject(ExecutionUtils.java:252) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.createExecutableExtension(ExternalFactoriesHelper.java:171) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.getElementsInstances(ExternalFactoriesHelper.java:156) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.getFactories(EditPartFactory.java:116) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.createEditPartPure(EditPartFactory.java:80) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.createEditPart(EditPartFactory.java:55) at org.eclipse.wb.internal.gef.core.AbstractEditPartViewer.setInput(AbstractEditPartViewer.java:140) at org.eclipse.wb.internal.core.editor.structure.components.ComponentsTreePage.setInput(ComponentsTreePage.java:283) at org.eclipse.wb.internal.core.editor.structure.DesignComponentsComposite.setInput(DesignComponentsComposite.java:90) at org.eclipse.wb.internal.core.editor.JavaDesignComposite.refresh(JavaDesignComposite.java:139) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:604) at org.eclipse.wb.internal.core.editor.DesignPage$8$1.run(DesignPage.java:468) at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236) at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:133) at org.eclipse.swt.widgets.Display.syncExec(Display.java:5186) at org.eclipse.wb.internal.core.editor.DesignPage$8.run(DesignPage.java:464) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:434) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:352) at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:470) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF_withProgress(DesignPage.java:484) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:432) at org.eclipse.wb.internal.core.editor.UndoManager.refreshDesignerEditor(UndoManager.java:389) at org.eclipse.wb.internal.core.editor.UndoManager.activate(UndoManager.java:90) at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState_True(DesignPage.java:275) at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState(DesignPage.java:252) at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode.showPage(DefaultMultiMode.java:127) at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode$1.widgetSelected(DefaultMultiMode.java:63) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4579) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325) at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3248) at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1882) at org.eclipse.swt.custom.CTabFolder.lambda$0(CTabFolder.java:331) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4579) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4365) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3941) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046) 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:551) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) Full context stack trace:

org.eclipse.core.runtime.CoreException: Plug-in "org.eclipse.wb.xwt" was unable to instantiate class "org.eclipse.wb.internal.xwt.gefTree.EditPartFactory". at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:212) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:206) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:920) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:246) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:63) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.lambda$1(ExternalFactoriesHelper.java:183) at org.eclipse.wb.internal.core.utils.execution.ExecutionUtils.runObject(ExecutionUtils.java:252) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.createExecutableExtension(ExternalFactoriesHelper.java:171) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.getElementsInstances(ExternalFactoriesHelper.java:156) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.getFactories(EditPartFactory.java:116) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.createEditPartPure(EditPartFactory.java:80) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.createEditPart(EditPartFactory.java:55) at org.eclipse.wb.internal.gef.core.AbstractEditPartViewer.setInput(AbstractEditPartViewer.java:140) at org.eclipse.wb.internal.core.editor.structure.components.ComponentsTreePage.setInput(ComponentsTreePage.java:283) at org.eclipse.wb.internal.core.editor.structure.DesignComponentsComposite.setInput(DesignComponentsComposite.java:90) at org.eclipse.wb.internal.core.editor.JavaDesignComposite.refresh(JavaDesignComposite.java:139) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:604) at org.eclipse.wb.internal.core.editor.DesignPage$8$1.run(DesignPage.java:468) at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236) at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:133) at org.eclipse.swt.widgets.Display.syncExec(Display.java:5186) at org.eclipse.wb.internal.core.editor.DesignPage$8.run(DesignPage.java:464) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:434) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:352) at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:470) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF_withProgress(DesignPage.java:484) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:432) at org.eclipse.wb.internal.core.editor.UndoManager.refreshDesignerEditor(UndoManager.java:389) at org.eclipse.wb.internal.core.editor.UndoManager.activate(UndoManager.java:90) at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState_True(DesignPage.java:275) at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState(DesignPage.java:252) at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode.showPage(DefaultMultiMode.java:127) at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode$1.widgetSelected(DefaultMultiMode.java:63) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4579) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325) at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3248) at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1882) at org.eclipse.swt.custom.CTabFolder.lambda$0(CTabFolder.java:331) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4579) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4365) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3941) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046) 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:551) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) Caused by: java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableList at org.eclipse.wb.internal.xwt.gefTree.EditPartFactory.(EditPartFactory.java:27) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:204) ... 70 more Caused by: java.lang.ClassNotFoundException: com.google.common.collect.ImmutableList cannot be found by org.eclipse.wb.xwt_1.9.1.202203170939 at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:529) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:524) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ... 77 more`

[yalongy]

There is no other plugin updated in Eclipse , only WindowBuilder plugin

here is msg tip when clicking 'design' after opened with WindowBuilder Editor Plugin :

`Internal Error

WindowBuilder encountered unexpected internal error.

This could be caused by a WindowBuilder bug or by a misconfiguration issue, conflict, partial update, etc.

org.eclipse.core.runtime.CoreException: Plug-in "org.eclipse.wb.xwt" was unable to instantiate class "org.eclipse.wb.internal.xwt.gefTree.EditPartFactory".

Hide stack trace. Stack trace:

java.lang.ClassNotFoundException: com.google.common.collect.ImmutableList cannot be found by org.eclipse.wb.xwt_1.9.1.202203170939 at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:529) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:524) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at org.eclipse.wb.internal.xwt.gefTree.EditPartFactory.(EditPartFactory.java:27) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:204) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:920) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:246) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:63) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.lambda$1(ExternalFactoriesHelper.java:183) at org.eclipse.wb.internal.core.utils.execution.ExecutionUtils.runObject(ExecutionUtils.java:252) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.createExecutableExtension(ExternalFactoriesHelper.java:171) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.getElementsInstances(ExternalFactoriesHelper.java:156) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.getFactories(EditPartFactory.java:116) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.createEditPartPure(EditPartFactory.java:80) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.createEditPart(EditPartFactory.java:55) at org.eclipse.wb.internal.gef.core.AbstractEditPartViewer.setInput(AbstractEditPartViewer.java:140) at org.eclipse.wb.internal.core.editor.structure.components.ComponentsTreePage.setInput(ComponentsTreePage.java:283) at org.eclipse.wb.internal.core.editor.structure.DesignComponentsComposite.setInput(DesignComponentsComposite.java:90) at org.eclipse.wb.internal.core.editor.JavaDesignComposite.refresh(JavaDesignComposite.java:139) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:604) at org.eclipse.wb.internal.core.editor.DesignPage$8$1.run(DesignPage.java:468) at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236) at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:133) at org.eclipse.swt.widgets.Display.syncExec(Display.java:5186) at org.eclipse.wb.internal.core.editor.DesignPage$8.run(DesignPage.java:464) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:434) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:352) at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:470) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF_withProgress(DesignPage.java:484) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:432) at org.eclipse.wb.internal.core.editor.UndoManager.refreshDesignerEditor(UndoManager.java:389) at org.eclipse.wb.internal.core.editor.UndoManager.activate(UndoManager.java:90) at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState_True(DesignPage.java:275) at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState(DesignPage.java:252) at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode.showPage(DefaultMultiMode.java:127) at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode$1.widgetSelected(DefaultMultiMode.java:63) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4579) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325) at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3248) at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1882) at org.eclipse.swt.custom.CTabFolder.lambda$0(CTabFolder.java:331) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4579) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4365) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3941) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046) 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:551) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) Full context stack trace:

org.eclipse.core.runtime.CoreException: Plug-in "org.eclipse.wb.xwt" was unable to instantiate class "org.eclipse.wb.internal.xwt.gefTree.EditPartFactory". at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:212) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:206) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:920) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:246) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:63) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.lambda$1(ExternalFactoriesHelper.java:183) at org.eclipse.wb.internal.core.utils.execution.ExecutionUtils.runObject(ExecutionUtils.java:252) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.createExecutableExtension(ExternalFactoriesHelper.java:171) at org.eclipse.wb.internal.core.utils.external.ExternalFactoriesHelper.getElementsInstances(ExternalFactoriesHelper.java:156) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.getFactories(EditPartFactory.java:116) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.createEditPartPure(EditPartFactory.java:80) at org.eclipse.wb.internal.core.gefTree.EditPartFactory.createEditPart(EditPartFactory.java:55) at org.eclipse.wb.internal.gef.core.AbstractEditPartViewer.setInput(AbstractEditPartViewer.java:140) at org.eclipse.wb.internal.core.editor.structure.components.ComponentsTreePage.setInput(ComponentsTreePage.java:283) at org.eclipse.wb.internal.core.editor.structure.DesignComponentsComposite.setInput(DesignComponentsComposite.java:90) at org.eclipse.wb.internal.core.editor.JavaDesignComposite.refresh(JavaDesignComposite.java:139) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:604) at org.eclipse.wb.internal.core.editor.DesignPage$8$1.run(DesignPage.java:468) at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236) at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:133) at org.eclipse.swt.widgets.Display.syncExec(Display.java:5186) at org.eclipse.wb.internal.core.editor.DesignPage$8.run(DesignPage.java:464) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:434) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:352) at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:470) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF_withProgress(DesignPage.java:484) at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:432) at org.eclipse.wb.internal.core.editor.UndoManager.refreshDesignerEditor(UndoManager.java:389) at org.eclipse.wb.internal.core.editor.UndoManager.activate(UndoManager.java:90) at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState_True(DesignPage.java:275) at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState(DesignPage.java:252) at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode.showPage(DefaultMultiMode.java:127) at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode$1.widgetSelected(DefaultMultiMode.java:63) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4579) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325) at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3248) at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1882) at org.eclipse.swt.custom.CTabFolder.lambda$0(CTabFolder.java:331) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4579) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4365) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3941) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046) 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:551) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) Caused by: java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableList at org.eclipse.wb.internal.xwt.gefTree.EditPartFactory.(EditPartFactory.java:27) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:204) ... 70 more Caused by: java.lang.ClassNotFoundException: com.google.common.collect.ImmutableList cannot be found by org.eclipse.wb.xwt_1.9.1.202203170939 at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:529) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:524) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ... 77 more`

sometimes display none (can not see frame window)

[ptziegler]

I see... that sounds like a duplicate of #499

In short: WindowBuilder was only partially updated

java.lang.ClassNotFoundException: com.google.common.collect.ImmutableList cannot be found by org.eclipse.wb.xwt_1.9.1.202203170939

As seen here, this is not the correct version. To fix this, you need to do a clean re-installation of WindowBuilder.

1) In your menu bar, click on Help -> About Eclipse -> Installation Details 2) In the Installed Software tab, search for all WindowBuilder components and uninstall them 3) Reinstall WindowBuilder from the marketplace

[yalongy]

errors still exist..

[ptziegler]

@yalongy

Can you provide a screenshot of your "Installed Software" tab?

Because that was the configuration where the error you described showed up.

After I manually deinstalled the SWT Designer XWT Support and XML Core, the problem was gone. Meaning I still believe that one of the plugins was not properly removed in your Eclipse installation.

[ptziegler]

I'm closing this one. From what I can tell, the issue showed up after updating the WindowBuilder version. The solution is to either explicitly remove the old installation, before performing the update or installing WindowBuilder in a fresh installation.

Feel free to reopen this issue, if this problem continues to exist.