[nbusers] EntityManager problems

  • From: "Kira-sempai" < >
  • To:
  • Subject: [nbusers] EntityManager problems
  • Date: Sat, 31 Mar 2012 12:00:38 +0000

Hi!

I'm trying to repeat this tutorial:
http://platform.netbeans.org/tutorials/nbm-crud.html

But I'm stuck at "Designing the User Interface". Then I start debug project I 
can't go further "EntityManager entityManager = 
Persistence.createEntityManagerFactory("CustomerLibraryPU").createEntityManager();"
 line

I get NullPointerException then trying to open Viewer

java.lang.NullPointerException
        at 
org.openide.windows.OpenComponentAction.actionPerformed(OpenComponentAction.java:89)
        at 
org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:197)
        at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
        at 
org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
        at 
org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
        at 
org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:200)
        at 
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
        at 
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
        at 
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
        at 
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
        at 
javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
        at 
javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
        at java.awt.Component.processMouseEvent(Component.java:6505)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
        at java.awt.Component.processEvent(Component.java:6270)
        at java.awt.Container.processEvent(Container.java:2229)
        at java.awt.Component.dispatchEventImpl(Component.java:4861)
        at java.awt.Container.dispatchEventImpl(Container.java:2287)
        at java.awt.Component.dispatchEvent(Component.java:4687)
        at 
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
        at 
java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
        at java.awt.Container.dispatchEventImpl(Container.java:2273)
        at java.awt.Window.dispatchEventImpl(Window.java:2713)
        at java.awt.Component.dispatchEvent(Component.java:4687)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
        at java.awt.EventQueue.access$000(EventQueue.java:101)
        at java.awt.EventQueue$3.run(EventQueue.java:666)
        at java.awt.EventQueue$3.run(EventQueue.java:664)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
        at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
        at java.awt.EventQueue$4.run(EventQueue.java:680)
        at java.awt.EventQueue$4.run(EventQueue.java:678)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
        at 
org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
[catch] at 
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
        at 
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
        at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
        at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

What should I do to open viewer?






[nbusers] EntityManager problems

Kira-sempai 03/31/2012

[nbusers] Re: EntityManager problems

Geertjan Wielenga 03/31/2012

[nbusers] Re: EntityManager problems

Javier Ortiz 03/31/2012

[nbusers] Re: EntityManager problems

Alexander Schell 03/31/2012

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