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See my response in borland.public.jbuilder.ide and please don't crosspost.

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"Kostas" <karadamoglou_k@yahoo.gr> wrote in message
news:3f50c3dc$1@newsgroups.borland.com...
> Hello all,
> Here is my problem. I have a class with decleration...
>
> public class EfzinCalendarManagerFrame extends EfzinInternalFrame
>
> The super class has the following code..
>
> public class EfzinInternalFrame extends JInternalFrame
> {
>    //Data
> members-------------------------------------------------------------
>    private static int openFrameCount = 0;
>    private static final int xOffset = 30, yOffset = 30;
>    private static Vector addedFrames = new Vector();
>    private static boolean selectedStatus = false;
>    private static Object selectedFrame=null;
>
>
//Methods------------------------------------------------------------------
>    public EfzinInternalFrame()
>    {
>       super();
>       addedFrames.add(this);
>       openFrameCount++;
>       try
>       {
>          jbInit();
>       }
>       catch (Exception e)
>       {
>          e.printStackTrace();
>       }
>
>    }
>
>    private void jbInit() throws Exception
>    {
>       //Set Default close operation
>       setDefaultCloseOperation(HIDE_ON_CLOSE);
>       this.addInternalFrameListener(new InternalFrameAdapter()
>       {
>          public void internalFrameDeactivated(InternalFrameEvent e)
>          {
>             EfzinInternalFrame.deActivateGetSelectedFrameMethod();
>          }
>
>          public void internalFrameActivated(InternalFrameEvent e)
>          {
>             EfzinInternalFrame.setSelectedFrame(EfzinInternalFrame.this);
>          }
>
>       }
>       );
>
>    }
>
> When i turn the EfzinCalendarManagerFrame  to the designer a i get the
> ordinary message...
>
> Failed to create live instance for variable 'this'. null
> class java.lang.NullPointerException null
>
> The problem is that EfzinCalendarManagerFrame   extends
EfzinInternalFrame.
> If i change the extends statement from EfzinInternalFrame to
JInternalFrame
> i will not get error. The weird is that when i open the
EfzinInternalFrame's
> designer tab all are correctly. Do you know a possible reason of this
> annoying behaviour?(I dont implement any abstract class either an
interface)
> Thank you for advance.
>
>
>
>
>
>