Help please exception when running from command line not in eclipse

[Ricardo Estafan]

Hello all,

if i run my application in eclipse all works well. If i ecport the file as a jar file runme.jar and run the application from the command line i receive the following exception :

  
Exception in thread "main" java.lang.NullPointerException
        at suncertify.client.ClientGUIController.valueChanged(ClientGUIController.java:153)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
        at javax.swing.DefaultListSelectionModel.changeSelection(Unknown Source)
        at javax.swing.DefaultListSelectionModel.changeSelection(Unknown Source)
        at javax.swing.DefaultListSelectionModel.removeSelectionIntervalImpl(Unknown Source)
        at javax.swing.DefaultListSelectionModel.removeSelectionInterval(Unknown Source)
        at javax.swing.JTable.checkLeadAnchor(Unknown Source)
        at javax.swing.JTable.tableChanged(Unknown Source)
        at javax.swing.JTable.setModel(Unknown Source)
        at suncertify.client.ClientGUIController.<init>(ClientGUIController.java:78)
        at suncertify.utils.BodgittAndScarper.main(BodgittAndScarper.java:111)
 

I will show a snippet of the code :

/**
    * Invokes when a different line is selected and sets values to book area.
    *
    * @param lse The ListSelectionEvent object.
    *
    * @see javax.swing.event.ListSelectionListener#valueChanged(javax.swing.event.ListSelectionEvent)
    */
   public void valueChanged(ListSelectionEvent lse)
   {
      if (!lse.getValueIsAdjusting())
      {
         contractorRowIndex = listSelectionModel.getMinSelectionIndex();
 
         // No selection.
         if (contractorRowIndex == -1)
         {
            // Book values are cleared. 
            (clientGUI.getBookNameText()).setText(null);
            (clientGUI.getBookLocationText()).setText(null);
            (clientGUI.getCustomerText()).setText(null);
 
            return;
         }
 
         // Set the name and location of the selected contractor and clears customer ID.
         contractorName = (String) contractorTableModel.getValueAt(contractorRowIndex, Constants.NAME_FIELD);
         contractorLocation = (String) contractorTableModel.getValueAt(contractorRowIndex, Constants.LOCATION_FIELD);
 
         String customerID = (String) contractorTableModel.getValueAt(contractorRowIndex, Constants.OWNER_FIELD);
 
         if (!customerID.equals(""))
         {
            // Contractor is already booked.
            userMessage = MessageConstants.STATUS_BOOK_CONTRACTOR_BOOKED;
            setGUIAvailability(GUIConstants.BUTTON_DISABLE, GUIConstants.BUTTON_ENABLE, userMessage);
         }
         else
         {
            // Contractor can be booked.
            userMessage = MessageConstants.STATUS_BOOK_CONTRACTOR;
            setGUIAvailability(GUIConstants.BUTTON_ENABLE, GUIConstants.BUTTON_ENABLE, userMessage);
         }
 
         (clientGUI.getBookNameText()).setText(contractorName);
         (clientGUI.getBookLocationText()).setText(contractorLocation);
         (clientGUI.getCustomerText()).setText(null);
      }
   }

How on earth can it be possible that it all runs in eclipse and not when i run it from the command line using the jar file...

Now i cannot debug because the problem is not occuring in eclipse environment.

What can i do best in this case?
Please help me out
[ January 29, 2005: Message edited by: Ricardo Estafan ]

[Robert Konigsberg]

1. Which line in your snippet is line 153?
2. Which variable is null? If you can't step through with a debugger, you can always use lots of 'if (blah == null)' everywhere, including stuff like 'if (clientGUI.getCustomerText() == null)'.
3. Finally, were you loading any additional classes or source files in your application?

That's a start.

[Steven Bell]

Usually if something runs in eclipse, but not on the command line, it is a classpath issue. The program can't find some needed file or jar. Although with a NullPointerException that may not be right unless you are getting an object from some factory.

[Ricardo Estafan]

Yes i am getting the database from a factory...

What could i do to test this?

[Ricardo Estafan]

Yo guys i found it the listselectiomodel was null.

But how on earth it didn't fire in eclipse... i don't know???