[Java] Column Header

Zdravo

Mene pa zanima kako se pri jScrollpane in pri jTable naštimajo column headerji. delam v netbeansih in mi nikakor ni uspelo dodati column headerja.

jScrollPane2.setViewport(null);
        jTable1.setModel(new AbstractTableModel()
            {
                public int getColumnCount() { return 3;}
                public int getRowCount() { return viator.size();}
                public Object getValueAt(int row, int col)
                {
                    StolpecTabele s= (StolpecTabele) viator.get(row);
                    switch (col)
                    {
                        case 0:
                        return s.imeStolpca;
                        case 1:
                        return s.tipStolpca;
                        case 2:
                        return ""+s.nullable;
                    };
                    return new Integer(row*col);
                }
            });
            jTable1.setTableHeader(null);
            jScrollPane2.setViewportView(jTable1);