Source code menampilkan data

private void tampil() {
        try {
            int row =jTable1.getRowCount();
            for(int i=0; i<row; i++){
                table.removeRow(0);
            }

            Connection koneksi=DriverManager.getConnection("jdbc:mysql://localhost:3306/"+"demo","root","");
            ResultSet dat=koneksi.createStatement().executeQuery("select * from helpdeskcoy");
            while(dat.next()){
                String [] data={dat.getString(1),dat.getString(2),dat.getString(3),dat.getString(4),dat.getString(5),dat.getString(6),dat.getString(7),dat.getString(8),dat.getString(9),dat.getString(10),dat.getString(11)};
                table.addRow(data);
            }
        } catch (SQLException ex) {
           JOptionPane.showMessageDialog(rootPane,"Database error");
        }
    }
}