java.lang.NullPointerException at java.awt.Container.addImpl(Container.java:345) at java.awt.Container.add(Container.java:267) at org.netbeans.modules.form.layoutsupport.AbstractLayoutSupport.addComponent(AbstractLayoutSupport.java:170) at org.netbeans.modules.form.layoutsupport.GridBagLayoutSupport.addComponent(GridBagLayoutSupport.java:45) at org.netbeans.modules.form.RADVisualContainer.setLayoutSupport(RADVisualContainer.java:174) at org.netbeans.modules.form.GandalfPersistenceManager.loadContainer(GandalfPersistenceManager.java:584) at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:286) at org.netbeans.modules.form.FormEditorSupport.loadForm(FormEditorSupport.java:106) at org.netbeans.modules.form.FormDesigner.readExternal(FormDesigner.java:115) at org.openide.windows.TopComponent$Replacer.readObject(TopComponent.java:706) at java.lang.reflect.Method.invoke(Native Method) at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2213) at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1410) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at org.openide.util.io.NbMarshalledObject.get(NbMarshalledObject.java:88) at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.validateData(WindowManagerImpl.java:1337) at org.netbeans.core.windows.frames.DefaultContainerImpl.validateData(DefaultContainerImpl.java:895) at org.netbeans.core.windows.frames.DefaultContainerImpl.validateData(DefaultContainerImpl.java:861) at org.netbeans.core.windows.frames.MultiTabbedContainerImpl.validateData(MultiTabbedContainerImpl.java:498) at org.netbeans.core.windows.ModeImpl.validateData(ModeImpl.java:1280) at org.netbeans.core.windows.WorkspaceVisibilityManager.processModesValidation(WorkspaceVisibilityManager.java:324) at org.netbeans.core.windows.WorkspaceVisibilityManager.validateModes(WorkspaceVisibilityManager.java:234) at org.netbeans.core.windows.WorkspaceImpl.validateData(WorkspaceImpl.java:615) at org.netbeans.core.windows.WindowManagerImpl$SerializationReplacer.readResolve(WindowManagerImpl.java:866) at java.lang.reflect.Method.invoke(Native Method) at java.io.ObjectStreamClass.invokeMethod(ObjectStreamClass.java:1615) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:393) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at org.openide.util.io.NbMarshalledObject.get(NbMarshalledObject.java:88) at org.netbeans.modules.projects.PSupport.updateWindowManager(PSupport.java:897) at org.netbeans.modules.projects.PSupport.projectOpen(PSupport.java:264) at org.netbeans.core.NbProjectOperation.setProject(NbProjectOperation.java:129) at org.netbeans.core.NbProjectOperation.setOpeningProject(NbProjectOperation.java:192) at org.netbeans.core.NbProjectOperation.openOrCreateProject(NbProjectOperation.java:178) at org.netbeans.core.NonGui.run(NonGui.java:495) at org.netbeans.core.Main.run(Main.java:187) at org.openide.TopManager.initializeTopManager(TopManager.java:120) at org.openide.TopManager.getDefault(TopManager.java:81) at org.netbeans.core.Main.main(Main.java:274) at org.netbeans.core.TopThreadGroup.run(TopThreadGroup.java:90) at java.lang.Thread.run(Thread.java:484) java.lang.NoSuchMethodException at java.lang.Class.getConstructor0(Native Method) at java.lang.Class.getConstructor(Class.java:927) at org.netbeans.modules.form.JavaCodeGenerator.generateComponentCreate(JavaCodeGenerator.java:747) at org.netbeans.modules.form.JavaCodeGenerator.addCreateCode(JavaCodeGenerator.java:624) at org.netbeans.modules.form.JavaCodeGenerator.addCreateCode(JavaCodeGenerator.java:629) at org.netbeans.modules.form.JavaCodeGenerator.regenerateInitializer(JavaCodeGenerator.java:478) at org.netbeans.modules.form.JavaCodeGenerator.access$400(JavaCodeGenerator.java:56) at org.netbeans.modules.form.JavaCodeGenerator$JCGFormListener.formLoaded(JavaCodeGenerator.java:1445) at org.netbeans.modules.form.FormModel.fireFormLoaded(FormModel.java:375) at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:290) at org.netbeans.modules.form.FormEditorSupport.loadForm(FormEditorSupport.java:106) at org.netbeans.modules.form.FormDesigner.readExternal(FormDesigner.java:115) at org.openide.windows.TopComponent$Replacer.readObject(TopComponent.java:706) at java.lang.reflect.Method.invoke(Native Method) at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2213) at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1410) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at org.openide.util.io.NbMarshalledObject.get(NbMarshalledObject.java:88) at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.validateData(WindowManagerImpl.java:1337) at org.netbeans.core.windows.frames.DefaultContainerImpl.validateData(DefaultContainerImpl.java:895) at org.netbeans.core.windows.frames.DefaultContainerImpl.validateData(DefaultContainerImpl.java:861) at org.netbeans.core.windows.frames.MultiTabbedContainerImpl.validateData(MultiTabbedContainerImpl.java:498) at org.netbeans.core.windows.ModeImpl.validateData(ModeImpl.java:1280) at org.netbeans.core.windows.WorkspaceVisibilityManager.processModesValidation(WorkspaceVisibilityManager.java:324) at org.netbeans.core.windows.WorkspaceVisibilityManager.validateModes(WorkspaceVisibilityManager.java:234) at org.netbeans.core.windows.WorkspaceImpl.validateData(WorkspaceImpl.java:615) at org.netbeans.core.windows.WindowManagerImpl$SerializationReplacer.readResolve(WindowManagerImpl.java:866) at java.lang.reflect.Method.invoke(Native Method) at java.io.ObjectStreamClass.invokeMethod(ObjectStreamClass.java:1615) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:393) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at org.openide.util.io.NbMarshalledObject.get(NbMarshalledObject.java:88) at org.netbeans.modules.projects.PSupport.updateWindowManager(PSupport.java:897) at org.netbeans.modules.projects.PSupport.projectOpen(PSupport.java:264) at org.netbeans.core.NbProjectOperation.setProject(NbProjectOperation.java:129) at org.netbeans.core.NbProjectOperation.setOpeningProject(NbProjectOperation.java:192) at org.netbeans.core.NbProjectOperation.openOrCreateProject(NbProjectOperation.java:178) at org.netbeans.core.NonGui.run(NonGui.java:495) at org.netbeans.core.Main.run(Main.java:187) at org.openide.TopManager.initializeTopManager(TopManager.java:120) at org.openide.TopManager.getDefault(TopManager.java:81) at org.netbeans.core.Main.main(Main.java:274) at org.netbeans.core.TopThreadGroup.run(TopThreadGroup.java:90) at java.lang.Thread.run(Thread.java:484)