Is it possible to insert data into a MySQL database with Java?

Question

Hello everyone!
I would like to know, if it's possible to insert data into a MySQL database, with a JFrame inside a servlet?
When the JFrame is first created it calls this method:
     * Connects the servlet with the MySQL database.
    private void connect(){
        try{
            Class.forName("com.mysql.jdbc.Driver");
            connection = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/data", "root", "omfg123");
        }catch(ClassNotFoundException cnfe){
            cnfe.printStackTrace();
        }catch(SQLException sqle){
            sqle.printStackTrace();
    }Then, when you click the "Add" button, it executes this code:
            add.addActionListener(new ActionListener(){
                @Override
                public void actionPerformed(ActionEvent ae){
                    String employee = employeeName.getText();
                    String[] args = employee.split(" ");
                    firstName = args[0];
                    lastName = args[1];
                    execute();
            });And this is my "execute()" method:
     * Connects the servlet with the MySQL database.
     * - And executes the SQL queries.
    private void execute(){
        try{
            PreparedStatement statement = connection.prepareStatement("insert" +
                    " into employees values(" + firstName + ", " + lastName
                    + ")");
            ResultSet result = statement.executeQuery();
            String fullName = firstName + " " + lastName;
            printer.write("Employee " + fullName + " added.</br>");
        }catch(SQLException sqle){
            sqle.printStackTrace();
    }But when I click the "Add" button, nothing happens.

Answer 1

This is what I use to insert into mysql. It works on windows.
try {
            Class.forName("com.mysql.jdbc.Driver");
            String connectionUrl = "jdbc:mysql://" + loadip + "/custsig?" +
                    "user=root&password=";
            Connection con = DriverManager.getConnection(connectionUrl);
            newproc = jTextField1.getText();
            newsoft = jTextField2.getText();
            newdeb = jTextField3.getText();
            newcust = jTextField4.getText();
            if (newcust.equals("")) {
                errorsig12 = 1;
                jLabel1.setForeground(new java.awt.Color(255, 0, 0));
            } else if (newsoft.equals("")) {
                errorsig12 = 1;
                jLabel2.setForeground(new java.awt.Color(0, 0, 0));
            } else if (newproc.equals("")) {
                errorsig12 = 1;
                jLabel3.setForeground(new java.awt.Color(0, 0, 0));
            } else if (newdeb.equals("")) {
                errorsig12 = 1;
                jLabel4.setForeground(new java.awt.Color(0, 0, 0));
            if (errorsig12 == 0) {
                PreparedStatement ps = con.prepareStatement("insert into customer set cust_name = ?,  software = ?, processor = ?, debit = ?");
                ps.setString(4, newdeb);
                ps.setString(3, newproc);
                ps.setString(2, newsoft);
                ps.setString(1, newcust);
                int rs = ps.executeUpdate();
        } catch (SQLException eg) {
            System.out.println("SQL Exception: " + eg.toString());
        } catch (ClassNotFoundException cE) {
            System.out.println("Class Not Found Exception: " + cE.toString());
        }