🚀 go-pugleaf

Help!

I recently bought a new PC, and decided to upgrade from JBuilder5. The 
code I developed in JB5 now has a bug in it, in a class that implements 
ListSelectionListener and contains a DefaultListModel. The code waits 
for a click on an entry in the list, and then should delete it from the 
list so I can display it for editing elsewhere in the dialog box.

My code inside SummaryPane (which implements the listener):

*51*  public void valueChanged(ListSelectionEvent evt) {
*52*    if ( !evt.getValueIsAdjusting() )
*53*    {
*54*      JList source = (JList)evt.getSource();
*55*      BHXLines line = (BHXLines)source.getSelectedValue();
*56*      parent.editLine(line);
*57*   }
*58*  }

The resulting null-pointer exception:
java.lang.NullPointerException
	at dialogs.DialogExpense.moveLineData(DialogExpense.java:217)
	at dialogs.SplitsDialog.editLine(SplitsDialog.java:99)
	at dialogs.SummaryPane.valueChanged(SummaryPane.java:56)
	at javax.swing.JList.fireSelectionValueChanged(JList.java:1321)
	at javax.swing.JList$ListSelectionHandler.valueChanged(JList.java:1335)
	at 
javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:187)
	at 
javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
	at 
javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:214)
	at 
javax.swing.DefaultListSelectionModel.removeIndexInterval(DefaultListSelectionModel.java:546)
	at 
javax.swing.plaf.basic.BasicListUI$ListDataHandler.intervalRemoved(BasicListUI.java:1561)
	at 
javax.swing.AbstractListModel.fireIntervalRemoved(AbstractListModel.java:160)
	at javax.swing.DefaultListModel.removeElement(DefaultListModel.java:364)
	at dialogs.SummaryPane.remove(SummaryPane.java:65)
	at dialogs.SplitsDialog.editLine(SplitsDialog.java:97)
	at dialogs.SummaryPane.valueChanged(SummaryPane.java:56) *** first 
entry to my program
	at javax.swing.JList.fireSelectionValueChanged(JList.java:1321)
	at javax.swing.JList$ListSelectionHandler.valueChanged(JList.java:1335)
	at 
javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:187)
	at 
javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:157)

Thus, after it enters my code with a non-null line, it eventually enters 
DefaultListModel.removeElement - and next thing I know I'm getting 
called at the same entry point with a null entry.

I'm stumped (and when I tried to open JBuilderX help, it can't find ANY 
help files whatsoever, so I can't look to see if the class has changed.

Can anyone help me out?

Thanks in advance!

Glen Hanket