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  1. ,
    via Stack Overflow by ERJAN

    This exception occurs when using an older version of java. Mainly when trying to run a jar compiled with a newer Java version in an older Java version. We can avoid this issue by executing the jar in the same version which it was compiled.

  2. ,
    via Google Groups by Marcus Haebler

    Update "latest" to Java 8 on DockerHub.

Solutions on the web

via shelled by tbartold
, 1 year ago
via eclipse-ccase by raspy
, 1 year ago
Bad version number in .class file
via instantiations.com by Unknown author, 2 years ago
via eclipse-ccase by urs_maverick
, 1 year ago
Bad version number in .class file
via Google Groups by Richard, 2 years ago
Bad version number in .class file
via shelled by rsumilang
, 1 year ago
Bad version number in .class file
java.lang.UnsupportedClassVersionError: Bad version number in .class file	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:161)	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:501)	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:471)	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:430)	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:413)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:189)	at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:340)	at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:408)	at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:369)	at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:357)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83)	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)	at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:289)	at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1269)	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:160)	at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:788)	at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)	at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)	at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:252)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)	at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:248)	at org.eclipse.ui.internal.registry.EditorDescriptor.createEditor(EditorDescriptor.java:231)	at org.eclipse.ui.internal.EditorManager.createPart(EditorManager.java:841)	at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:606)	at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:426)	at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:592)	at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:299)	at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:179)	at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)	at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)	at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:400)	at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256)	at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209)	at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1604)	at org.eclipse.ui.internal.PartStack.add(PartStack.java:499)	at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103)	at org.eclipse.ui.internal.PartStack.add(PartStack.java:485)	at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:112)	at org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:63)	at org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:217)	at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:207)	at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:774)	at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:673)	at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:634)	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2737)	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2651)	at org.eclipse.ui.internal.WorkbenchPage.access$13(WorkbenchPage.java:2643)	at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2595)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2590)	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2574)	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2565)	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:644)	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:603)	at org.eclipse.ui.actions.OpenFileAction.openFile(OpenFileAction.java:98)	at org.eclipse.ui.actions.OpenSystemEditorAction.run(OpenSystemEditorAction.java:98)	at org.eclipse.ui.views.navigator.OpenActionGroup.runDefaultAction(OpenActionGroup.java:125)	at org.eclipse.ui.views.navigator.MainActionGroup.runDefaultAction(MainActionGroup.java:328)	at org.eclipse.ui.views.navigator.ResourceNavigator.handleOpen(ResourceNavigator.java:690)	at org.eclipse.ui.views.navigator.ResourceNavigator$6.open(ResourceNavigator.java:433)	at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:820)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)	at org.eclipse.core.runtime.Platform.run(Platform.java:857)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:46)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:199)	at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:818)	at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1079)	at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1183)	at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:263)	at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:257)	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:297)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3319)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)	at org.eclipse.equinox.launcher.Main.run(Main.java:1173)	at org.eclipse.equinox.launcher.Main.main(Main.java:1148)