Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via netbeans.org by Unknown author, 2 years ago
The type [null] is not the expected [EntityType] for the key class [class br.com.thinkit.db.Ativos].
via netbeans.org by Unknown author, 1 year ago
The type [null] is not the expected [EntityType] for the key class [class br.com.thinkit.db.Ativos].
via Oracle Community by sukram, 1 year ago
The type [null] is not the expected [EntityType] for the key class [class Persistence.NewEntity].
via Stack Overflow by Markus
, 2 years ago
The type [null] is not the expected [EntityType] for the key class [class Persistence.NewEntity].
via Stack Overflow by sass
, 2 years ago
The type [null] is not the expected [EntityType] for the key class [class jpa.entities.BusStop].
via Eclipse Bugzilla by michael.f.obrien, 1 year ago
The type [null] is not the expected [EntityType] for the key class [class org.eclipse.persistence.example.jpa.server.business.Cell].
java.lang.IllegalArgumentException: The type [null] is not the expected [EntityType] for the key class [class br.com.thinkit.db.Ativos].	at org.eclipse.persistence.internal.jpa.metamodel.MetamodelImpl.entity(MetamodelImpl.java:152)	at br.com.thinkit.ConsultaAtivoImpl.(ConsultaAtivoImpl.java:50)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)	at java.lang.Class.newInstance0(Class.java:355)	at java.lang.Class.newInstance(Class.java:308)	at org.openide.util.lookup.implspi.SharedClassObjectBridge.newInstance(SharedClassObjectBridge.java:64)	at org.openide.util.lookup.MetaInfServicesLookup$P.getInstance(MetaInfServicesLookup.java:472)	at org.openide.util.lookup.AbstractLookup.lookup(AbstractLookup.java:412)	at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:208)	at br.com.thinkit.editor.PainelTopComponent.(PainelTopComponent.java:36)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)	at org.openide.windows.TopComponent$Replacer.readObject(TopComponent.java:1595)	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:597)	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)	at org.netbeans.modules.settings.convertors.XMLSettingsSupport$SettingsRecognizer.readSerial(XMLSettingsSupport.java:547)	at org.netbeans.modules.settings.convertors.XMLSettingsSupport$SettingsRecognizer.instanceCreate(XMLSettingsSupport.java:579)	at org.netbeans.modules.settings.convertors.SerialDataConvertor$SettingsInstance.instanceCreate(SerialDataConvertor.java:423)	at org.netbeans.core.windows.persistence.PersistenceManager.getTopComponentPersistentForID(PersistenceManager.java:533)	at org.netbeans.core.windows.persistence.PersistenceManager.getTopComponentForID(PersistenceManager.java:643)	at org.netbeans.core.windows.PersistenceHandler.getTopComponentForID(PersistenceHandler.java:460)	at org.netbeans.core.windows.WindowManagerImpl.getTopComponentForID(WindowManagerImpl.java:816)	at org.netbeans.core.windows.WindowManagerImpl.findTopComponent(WindowManagerImpl.java:255)	at br.com.thinkit.editor.PainelTopComponent.findInstance(PainelTopComponent.java:255)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.netbeans.core.startup.layers.BinaryFS$AttrImpl$MethodAndParams.invoke(BinaryFS.java:607)	at org.netbeans.core.startup.layers.BinaryFS$AttrImpl.getValue(BinaryFS.java:540)	at org.netbeans.core.startup.layers.BinaryFS$BFSBase.getAttribute(BinaryFS.java:386)	at org.openide.filesystems.MultiFileObject.getAttribute(MultiFileObject.java:907)	at org.openide.filesystems.MultiFileObject.getAttribute(MultiFileObject.java:844)	at org.openide.filesystems.MultiFileObject.getAttribute(MultiFileObject.java:903)	at org.openide.filesystems.MultiFileObject.getAttribute(MultiFileObject.java:844)	at org.openide.filesystems.MultiFileObject.getAttribute(MultiFileObject.java:772)	at org.netbeans.core.startup.layers.BinaryFS$FileMap.get(BinaryFS.java:955)	at org.openide.windows.OpenComponentAction.getTopComponent(OpenComponentAction.java:74)	at org.openide.windows.OpenComponentAction.actionPerformed(OpenComponentAction.java:80)	at org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:137)	at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)	at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)	at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)	at org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:140)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)	at javax.swing.AbstractButton.doClick(AbstractButton.java:357)	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1223)	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1264)	at java.awt.Component.processMouseEvent(Component.java:6267)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)	at java.awt.Component.processEvent(Component.java:6032)	at java.awt.Container.processEvent(Container.java:2041)	at java.awt.Component.dispatchEventImpl(Component.java:4630)	at java.awt.Container.dispatchEventImpl(Container.java:2099)	at java.awt.Component.dispatchEvent(Component.java:4460)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)	at java.awt.Container.dispatchEventImpl(Container.java:2085)	at java.awt.Window.dispatchEventImpl(Window.java:2478)	at java.awt.Component.dispatchEvent(Component.java:4460)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)