🚀 go-pugleaf

Hello All!

I have following problem: I implement Drag and Drop in my program and I need
to show message box when drop occured, but when I call
JOptionPane.showMessageDialog() my program hangs.

This is an example which I have downloaded from java.sun.com

  public void drop (DropTargetDropEvent event) {

    try {
        Transferable transferable = event.getTransferable();

        // we accept only Strings
        if (transferable.isDataFlavorSupported (DataFlavor.stringFlavor)){

            event.acceptDrop(DnDConstants.ACTION_MOVE);
            String s = (String)transferable.getTransferData
 DataFlavor.stringFlavor);
            addElement( s );
            event.getDropTargetContext().dropComplete(true);

// THIS IS MY CODE INSERTION
            JOptionPane.showMessageDialog(this, "test", "test",
JOptionPane.INFORMATION_MESSAGE);
// THIS  IS END OF MY CODE INSERTION
        }
        else{
            event.rejectDrop();
        }
    }
    catch (IOException exception) {
        exception.printStackTrace();
        System.err.println( "Exception" + exception.getMessage());
        event.rejectDrop();
    }
    catch (UnsupportedFlavorException ufException ) {
      ufException.printStackTrace();
      System.err.println( "Exception" + ufException.getMessage());
      event.rejectDrop();
    }
  }

This also hangs.

I  tried to use SwingUtilities.invokeLater() to show message but it has the
same effect.  What am I doing wrong?