It is final post of this project and I think it will be very useful to learner. Any student can easily use this code and make his/her project completely.

To get help you can see the video.

Source code for marks paper.

try {
            String sql = "select * from answers where id=1 ";
            pst = con.prepareStatement(sql);
            rs = pst.executeQuery();
            if (rs.next()) {
                jTextField1.setText(rs.getString("ans1"));
                jTextField2.setText(rs.getString("ans2"));
            }else{
                JOptionPane.showMessageDialog(null, "Wrong ID...","Error",JOptionPane.ERROR_MESSAGE);
            }
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, e);
        }

Interface of after run the marks paper.