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CVS operation failed and I closed netbeans (didn't kill it. it closed nicely). Now when I try to open the IDE again I keep geting following exception and the IDE doesn't open anymore (I see splash screen but then it crashes): java.lang.NoClassDefFoundError: org/netbeans/swing/tabcontrol/SlidingButtonUI at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at org.netbeans.JarClassLoader.simpleFindClass(JarClassLoader.java:180) at org.netbeans.ProxyClassLoader.fullFindClass(ProxyClassLoader.java:630) at org.netbeans.ProxyClassLoader.smartLoadClass(ProxyClassLoader.java:555) at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:174) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at javax.swing.UIDefaults.getUIClass(UIDefaults.java:663) at javax.swing.UIDefaults.getUI(UIDefaults.java:732) at javax.swing.UIManager.getUI(UIManager.java:1012) at org.netbeans.swing.tabcontrol.SlidingButton.updateUI(SlidingButton.java:110) at javax.swing.AbstractButton.init(AbstractButton.java:2149) at javax.swing.JToggleButton.<init>(JToggleButton.java:159) at org.netbeans.swing.tabcontrol.SlidingButton.<init>(SlidingButton.java:62) at org.netbeans.core.windows.view.ui.slides.SlideBar.syncWithModel(SlideBar.java:436) at org.netbeans.core.windows.view.ui.slides.SlideBar.indicesChanged(SlideBar.java:182) at org.netbeans.swing.tabcontrol.DefaultTabDataModel.fireIndicesChanged(DefaultTabDataModel.java:470) at org.netbeans.swing.tabcontrol.DefaultTabDataModel.setTabs(DefaultTabDataModel.java:98) at org.netbeans.core.windows.view.ui.slides.TabbedSlideAdapter.setTopComponents(TabbedSlideAdapter.java:218) at org.netbeans.core.windows.view.ui.TabbedHandler.setTopComponents(TabbedHandler.java:134) at org.netbeans.core.windows.view.ui.AbstractModeContainer.setTopComponents(AbstractModeContainer.java:102) at org.netbeans.core.windows.view.ui.slides.SlideBarContainer.setTopComponents(SlideBarContainer.java:79) at org.netbeans.core.windows.view.ModeView.setTopComponents(ModeView.java:115) at org.netbeans.core.windows.view.SlidingView.<init>(SlidingView.java:53) at org.netbeans.core.windows.view.ViewHierarchy.updateViewForAccessor(ViewHierarchy.java:255) at org.netbeans.core.windows.view.ViewHierarchy.updateSlidingViews(ViewHierarchy.java:331) at org.netbeans.core.windows.view.ViewHierarchy.updateViewHierarchy(ViewHierarchy.java:133) at org.netbeans.core.windows.view.DefaultView.changeGUI(DefaultView.java:125) at org.netbeans.core.windows.ViewRequestor.dispatchRequest(ViewRequestor.java:247) at org.netbeans.core.windows.ViewRequestor.processVisibilityRequest(ViewRequestor.java:236) at org.netbeans.core.windows.ViewRequestor.postVisibilityRequest(ViewRequestor.java:173) at org.netbeans.core.windows.ViewRequestor.scheduleRequest(ViewRequestor.java:95) at org.netbeans.core.windows.Central.setVisible(Central.java:92) at org.netbeans.core.windows.WindowManagerImpl.setVisible(WindowManagerImpl.java:736) at org.netbeans.core.windows.WindowSystemImpl.show(WindowSystemImpl.java:65) [catch] at org.netbeans.core.NonGui$3.run(NonGui.java:191) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160) at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Yes, it's the same as 104229. *** This issue has been marked as a duplicate of 104229 ***
oops, please ignore my previous action, was a mistake.
Sorry, but this is probably corrupted NetBeans installation and/or user directory settings. The bug says that class SlidingButtonUI can't be found, which is impossible AFAIK in normal installation. Please try 1) Run NetBeans with fresh, empty user directory or then 2) Reinstall NetBeans and try to reproduce - I guess you won't see this error anymore and I can't do nothing without reproducible scenario . Please reopen with reproductions steps, thanks.