How do i connect a JavaFX FXML checkbox to a MySQL database?

I am a beginner trying to make checkboxes in a JavaFX app, can someone please tell me how do I connect to my database this checkbox method :

    @FXML
    private void handleOptions(ActionEvent e){
        String message= "";
        if(checkFc.isSelected()){
            message += checkFc.getText();
            return;
        }

i want to apply the value of the checkbox into this method :

public void addUsers (){    
    conn = mysqlconnect.ConnectDb();
    String sql = "insert into users (username,password,email,fc)values(?,?,?,? )";
    try {
        pst = conn.prepareStatement(sql);
        pst.setString(1, txtUsername.getText());
        pst.setString(2, txtPassword.getText());
        pst.setString(3, txtEmail.getText());
        pst.setString(4, checkFc.getText());

the getText method, though it works, it gets the value regardless if the checkbox is checked or not, while calling for the handleOptions method, I get cannot resolve method, which makes sense since these are prepared statements, so is there a way to make my method a preparedStatement or maybe I can connect my method another way altogether, please I really need help on this one.