JDBC 8: The Complete Code

package dbase2016;

/**
 *
 * @author ajb
 */
public class DBase2016 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
    GUIAddStudent  addStudent = new GUIAddStudent();
    addStudent.setVisible(true);
    }

}

package dbase2016;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

/**
 *
 * @author ajb
 */
public class DBase {

    private static Connection con;

    DBase() {
    try {
        Class.forName("com.mysql.jdbc.Driver").newInstance();
    } catch (Exception ex) {
        System.err.println(ex);
    }

    }

    public static void makeConnection() {
    try {
        con = DriverManager.getConnection("jdbc:mysql://localhost:3306/bluecoat", "root", "");
    } catch (SQLException ex) {
        System.err.println(ex);
    }

    }

    public static void printPupils() {

    Statement statement;
    makeConnection();
    try {
        statement = con.createStatement();
        ResultSet rs = statement.executeQuery("SELECT * FROM Student");

        while (rs.next()) {
        System.out.println("Forename: " + rs.getString("Forename") 
                  + " Surname: " + rs.getString("Surname")
                  + " Gender: " + rs.getString("Gender") 
                  + " Form: " + rs.getString("Form"));
        }

        con.close();

    } catch (SQLException ex) {
        System.err.println(ex);
    }
    }

    public static ArrayList<Student> getPupils()
    {
    ArrayList<Student> students = new ArrayList();
    Statement statement;
    makeConnection();
    try {
        statement = con.createStatement();
        ResultSet rs = statement.executeQuery("SELECT * FROM Student");

        while (rs.next()) {

        Student student = new Student();
        student.setForename(rs.getString("Forename")); 
        student.setSurname(rs.getString("Surname"));
        student.setGender(rs.getString("Gender"));
        student.setForm(rs.getString("Form"));
        students.add(student);
        }

        con.close();

    } catch (SQLException ex) {
        System.err.println(ex);
    }

    return students;
    }

    public static void addStudent() {

    makeConnection();
    try {
        PreparedStatement prep = con.prepareStatement("INSERT INTO Student (Forename, Surname, Gender, Form) VALUES (?,?,?,?)");
        prep.setString(1, "Last");
        prep.setString(2, "James");
        prep.setString(3, "M");
        prep.setString(4, "9C");

        prep.executeUpdate();

        con.close();

    } catch (SQLException ex) {
        System.err.println(ex);
    }

    }

    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;

/**
 *
 * @author ajb
 */
public class Student {
    private String forename;
    private String surname;
    private String gender;
    private String form;

    /**
     * @return the forename
     */
    public String getForename() {
    return forename;
    }

    /**
     * @param forename the forename to set
     */
    public void setForename(String forename) {
    this.forename = forename;
    }

    /**
     * @return the surname
     */
    public String getSurname() {
    return surname;
    }

    /**
     * @param surname the surname to set
     */
    public void setSurname(String surname) {
    this.surname = surname;
    }

    /**
     * @return the gender
     */
    public String getGender() {
    return gender;
    }

    /**
     * @param gender the gender to set
     */
    public void setGender(String gender) {
    this.gender = gender;
    }

    /**
     * @return the form
     */
    public String getForm() {
    return form;
    }

    /**
     * @param form the form to set
     */
    public void setForm(String form) {
    this.form = form;
    }

}

package dbase2016;

import java.util.ArrayList;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

/**
 *
 * @author ajb
 */
public class GUIDisplayStudents extends JFrame {

    JTextArea textArea;
    JScrollPane scrollPane;

    GUIDisplayStudents()
    {
    this.setSize(300,200);
    this.setLocationRelativeTo(null);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    textArea = new JTextArea("Sample Text");
    scrollPane = new JScrollPane(textArea);
    add(scrollPane);

    }

    GUIDisplayStudents(ArrayList<Student> students)
    {
    this.setSize(300,200);
    this.setLocationRelativeTo(null);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    textArea = new JTextArea();
    scrollPane = new JScrollPane(textArea);
    for(Student student : students)
    {            
        textArea.append(student.getForename() + " " + student.getSurname() + "\n");
    }
    add(scrollPane);

    }

}