JDBC 7: Adding Students using a GUI

public static void addStudent(Student student) {
   makeConnection();
    try {
    PreparedStatement prep = con.prepareStatement("INSERT INTO Student (Forename, Surname, Gender, Form) VALUES (?,?,?,?)");
    prep.setString(1, student.getForename());
    prep.setString(2, student.getSurname());
    prep.setString(3, student.getGender());
    prep.setString(4, student.getForm());
    prep.executeUpdate();
    con.close();
   } catch (SQLException ex) {
     System.err.println(ex);    
   }
}

package dbase2016;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
/**
 *
 * @author ajb
 */
public class GUIAddStudent extends JFrame implements ActionListener{
    JLabel lblForename = new JLabel("Forename");    
    JLabel lblSurname = new JLabel("Surname");
    JLabel lblGender = new JLabel("Gender");
    JLabel lblForm = new JLabel("Form");
    JTextField txtForename = new JTextField("");
    JTextField txtSurname = new JTextField("");
    JTextField txtGender = new JTextField("");
    JTextField txtForm = new JTextField("");
    JButton OK = new JButton("OK");
    GUIAddStudent()
    {
       Container vert = Box.createVerticalBox();
       vert.add(lblForename);
       vert.add(txtForename);
       vert.add(lblSurname);
       vert.add(txtSurname);
       vert.add(lblGender);
       vert.add(txtGender);
       vert.add(lblForm);
       vert.add(txtForm);
       vert.add(OK);
       OK.addActionListener(this);
       add(vert);
       this.setSize(300,250);
       this.setLocationRelativeTo(null);
       this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    }
    @Override
    public void actionPerformed(ActionEvent ae) {
       Student student = new Student();
       student.setForename(txtForename.getText());
       student.setSurname(txtSurname.getText());
       student.setGender(txtGender.getText());
       student.setForm(txtForm.getText());
       DBase.addStudent(student);
       GUIDisplayStudents  displayPupils = new GUIDisplayStudents(DBase.getPupils());
       displayPupils.setVisible(true);
    }
}