#145 NullpointerException while trying to create connection

[Seva Zaslavsky]

Similar error occurs on 2.0a1 and 1.2b9.
I tried this on two very different PCs:

- Windows XP 2G ram using MS Terminal Services JRE 1.6r13 no JDK
- Windows Vista 4G ram JRE+JDK 1.6r10

java.lang.NullPointerException
at org.mc4j.console.connection.wizard.ConnectionVisualPanel.isValid(ConnectionVisualPanel.java:174)
at java.awt.Component.invalidateIfValid(Unknown Source)
at java.awt.Component.setLocale(Unknown Source)
at javax.swing.JComponent.<init>(Unknown Source)
at javax.swing.JPanel.<init>(Unknown Source)
at javax.swing.JPanel.<init>(Unknown Source)
at javax.swing.JPanel.<init>(Unknown Source)
at org.mc4j.console.swing.ComponentBorder.<init>(ComponentBorder.java:76)
at org.mc4j.console.connection.wizard.ConnectionVisualPanel.<init>(ConnectionVisualPanel.java:67)
at org.mc4j.console.connection.wizard.ConnectionIterator.createPanels(ConnectionIterator.java:49)
at org.mc4j.console.connection.wizard.ConnectionIterator.getPanels(ConnectionIterator.java:78)
at org.mc4j.console.connection.wizard.ConnectionIterator.current(ConnectionIterator.java:142)
at org.openide.WizardDescriptor.updateState(WizardDescriptor.java:596)
at org.mc4j.console.connection.wizard.ConnectionDescriptor.updateState(ConnectionDescriptor.java:89)
at org.openide.WizardDescriptor.initialize(WizardDescriptor.java:373)
at org.openide.NotifyDescriptor.getterCalled(NotifyDescriptor.java:236)
at org.openide.DialogDescriptor.isModal(DialogDescriptor.java:291)
at org.netbeans.core.windows.services.NbDialog.<init>(NbDialog.java:36)
at org.netbeans.core.windows.services.DialogDisplayerImpl$1.run(DialogDisplayerImpl.java:76)
[catch] at org.openide.util.Mutex$1.run(Mutex.java:1188)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

[Barak]

Had the same problems with all mc4j versions (old ones too). Eventually switched to JDK 5 and the NPEs stopped. You can change the Java runtime that the application starts with in the 'MC4J Console 1.2b9.lax' file

[Anonymous]

I had this problem with my Mac after upgrading to Snow Leopard. Turns out they removed JVMs older than 1.6. I had to find some instructions on how to put the 1.5 JVM back in so that I could select it in the Java Preferences app (under Utilities). I could not determine how to give the app the path to a different JVM easily, but this worked.