¿Por qué mis Netbeans no crean un nuevo proyecto?

Acabo de instalar NetBeans 8.2, y todo parecía ir bien. Hice un valor predeterminado casi del 100%, excepto que eliminé uno o dos módulos que nunca necesitaría, y cambié el espacio de trabajo predeterminado la primera vez que se ejecutó.

Ahora no hará nada. Cuando hago clic en el File->New Projectcomando, no pasa nada. Cuando hago clic en varios otros comandos, simplemente no sucede nada.

El registro IDE muestra un seguimiento de la pila después de intentar crear un proyecto. Este es ese rastro:

SEVERE [global]
java.lang.ClassNotFoundException: javax.activation.DataContentHandlerFactory
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
    at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:222)
Caused: java.lang.ClassNotFoundException: javax.activation.DataContentHandlerFactory starting from ModuleCL@6c9be2b3[org.openide.awt] with possible defining loaders null and declared parents [org.netbeans.MainImpl$BootClassLoader@7a1ebcd8, ModuleCL@28e83a83[org.netbeans.api.annotations.common]]
    at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:224)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
Caused: java.lang.NoClassDefFoundError: javax/activation/DataContentHandlerFactory
    at org.openide.awt.QuickSearch.setUpSearch(QuickSearch.java:369)
    at org.openide.awt.QuickSearch.<init>(QuickSearch.java:107)
    at org.openide.awt.QuickSearch.attach(QuickSearch.java:197)
    at org.openide.awt.QuickSearch.attach(QuickSearch.java:125)
    at org.openide.explorer.view.TreeView$ExplorerTree.setupSearch(TreeView.java:1936)
    at org.openide.explorer.view.TreeView$ExplorerTree.<init>(TreeView.java:1753)
    at org.openide.explorer.view.TreeView.initializeTree(TreeView.java:299)
    at org.openide.explorer.view.TreeView.<init>(TreeView.java:238)
    at org.openide.explorer.view.TreeView.<init>(TreeView.java:228)
    at org.openide.explorer.view.BeanTreeView.<init>(BeanTreeView.java:98)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$CategoriesBeanTreeView.<init>(TemplatesPanelGUI.java:679)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$CategoriesPanel.createComponent(TemplatesPanelGUI.java:729)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$ExplorerProviderPanel.initGUI(TemplatesPanelGUI.java:644)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$ExplorerProviderPanel.<init>(TemplatesPanelGUI.java:535)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$CategoriesPanel.<init>(TemplatesPanelGUI.java:719)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$CategoriesPanel.<init>(TemplatesPanelGUI.java:719)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI.initComponents(TemplatesPanelGUI.java:421)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI.<init>(TemplatesPanelGUI.java:156)
    at org.netbeans.modules.project.ui.ProjectTemplatePanel.getComponent(ProjectTemplatePanel.java:187)
    at org.netbeans.modules.project.ui.NewProjectWizard.createTemplateChooser(NewProjectWizard.java:104)
    at org.openide.loaders.TemplateWizard.templateChooser(TemplateWizard.java:320)
    at org.openide.loaders.TemplateWizardIterImpl.firstPanel(TemplateWizardIterImpl.java:87)
    at org.openide.loaders.TemplateWizardIterImpl.current(TemplateWizardIterImpl.java:144)
    at org.openide.loaders.TemplateWizardIteratorWrapper.current(TemplateWizardIteratorWrapper.java:92)
    at org.openide.WizardDescriptor.updateStateOpen(WizardDescriptor.java:844)
    at org.openide.WizardDescriptor.updateState(WizardDescriptor.java:822)
    at org.openide.loaders.TemplateWizard.updateState(TemplateWizard.java:761)
    at org.netbeans.modules.project.ui.NewProjectWizard.updateState(NewProjectWizard.java:84)
    at org.openide.WizardDescriptor._updateState(WizardDescriptor.java:800)
    at org.openide.WizardDescriptor.access$200(WizardDescriptor.java:92)
    at org.openide.WizardDescriptor$Listener.stateChanged(WizardDescriptor.java:2180)
    at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:356)
    at org.openide.loaders.TemplateWizardIterImpl.run(TemplateWizardIterImpl.java:275)
    at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
    at java.desktop/java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:717)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:711)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:89)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
[catch] at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:199)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor org.netbeans.modules.project.ui.actions.NewProject$1
java.lang.ClassNotFoundException: javax.activation.DataContentHandlerFactory
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
    at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:222)
Caused: java.lang.ClassNotFoundException: javax.activation.DataContentHandlerFactory starting from ModuleCL@6c9be2b3[org.openide.awt] with possible defining loaders null and declared parents [org.netbeans.MainImpl$BootClassLoader@7a1ebcd8, ModuleCL@28e83a83[org.netbeans.api.annotations.common]]
    at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:224)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
Caused: java.lang.NoClassDefFoundError: javax/activation/DataContentHandlerFactory
    at org.openide.awt.QuickSearch.setUpSearch(QuickSearch.java:369)
    at org.openide.awt.QuickSearch.<init>(QuickSearch.java:107)
    at org.openide.awt.QuickSearch.attach(QuickSearch.java:197)
    at org.openide.awt.QuickSearch.attach(QuickSearch.java:125)
    at org.openide.explorer.view.TreeView$ExplorerTree.setupSearch(TreeView.java:1936)
    at org.openide.explorer.view.TreeView$ExplorerTree.<init>(TreeView.java:1753)
    at org.openide.explorer.view.TreeView.initializeTree(TreeView.java:299)
    at org.openide.explorer.view.TreeView.<init>(TreeView.java:238)
    at org.openide.explorer.view.TreeView.<init>(TreeView.java:228)
    at org.openide.explorer.view.BeanTreeView.<init>(BeanTreeView.java:98)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$CategoriesBeanTreeView.<init>(TemplatesPanelGUI.java:679)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$CategoriesPanel.createComponent(TemplatesPanelGUI.java:729)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$ExplorerProviderPanel.initGUI(TemplatesPanelGUI.java:644)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$ExplorerProviderPanel.<init>(TemplatesPanelGUI.java:535)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$CategoriesPanel.<init>(TemplatesPanelGUI.java:719)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI$CategoriesPanel.<init>(TemplatesPanelGUI.java:719)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI.initComponents(TemplatesPanelGUI.java:421)
    at org.netbeans.modules.project.ui.TemplatesPanelGUI.<init>(TemplatesPanelGUI.java:156)
    at org.netbeans.modules.project.ui.ProjectTemplatePanel.getComponent(ProjectTemplatePanel.java:187)
    at org.netbeans.modules.project.ui.NewProjectWizard.createTemplateChooser(NewProjectWizard.java:104)
    at org.openide.loaders.TemplateWizard.templateChooser(TemplateWizard.java:320)
    at org.openide.loaders.TemplateWizardIterImpl.firstPanel(TemplateWizardIterImpl.java:87)
    at org.openide.loaders.TemplateWizardIterImpl.current(TemplateWizardIterImpl.java:144)
    at org.openide.loaders.TemplateWizardIteratorWrapper.current(TemplateWizardIteratorWrapper.java:92)
    at org.openide.WizardDescriptor.updateStateOpen(WizardDescriptor.java:844)
    at org.openide.WizardDescriptor.updateState(WizardDescriptor.java:822)
    at org.openide.loaders.TemplateWizard.updateState(TemplateWizard.java:761)
    at org.netbeans.modules.project.ui.NewProjectWizard.updateState(NewProjectWizard.java:84)
    at org.openide.loaders.TemplateWizard$2.run(TemplateWizard.java:497)
    at org.openide.loaders.TemplateWizard$2.run(TemplateWizard.java:494)
    at org.netbeans.modules.openide.util.NbMutexEventProvider$Event$1AWTWorker.run(NbMutexEventProvider.java:156)
    at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:303)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
    at java.desktop/java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:717)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:711)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:89)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:199)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
[catch] at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
INFO [org.netbeans.modules.autoupdate.updateprovider.AutoupdateCatalogParser]: Unpaired license 00000008 without any module.
INFO [null]: Last record repeated again.

Por favor aclare la versión jdk. En mi caso, uso la siguiente solución: NetBeans 8.2 no es compatible con jdk 9. Renombro temporalmente el directorio jdk-9 y cambio el jdkhome predeterminado al reiniciar. O cambie netbeans_jdkhome en etc \ netbeans.conf.

Quizás esto ayude también.

JDK 9 aún no funciona con Netbeans 8.2. Necesita al menos JDK 8 , JRE 8 .

Abra una línea de comandos y escriba "javac -version" para ver la versión JDK.

En netbeans, en la pestaña "herramientas", elija "java-plataformas" y agregue el JDK 8 como predeterminado a través de "agregar plataforma" (carpeta jdk). O intente reinstalar netbeans y elija JDK 8 durante la instalación.

Algunas respuestas aquí y aquí .