Javafx + JDBC

import java.time.LocalDate;
import java.util.Calendar;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.stage.Stage;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;

import java.lang.Thread.State;
import java.sql.*;

public class Devansh_JavaFx_JDBC extends Application{

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        launch();
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        // TODO Auto-generated method stub
        primaryStage.setTitle("Registration Form");
        GridPane root = new GridPane();
        root.setHgap(15);
        root.setVgap(15);

        Label lb_name = new Label("Name:");
        TextField name = new TextField();
        root.add(lb_name, 1,1);
        root.add(name, 2,1);

        Label lb_email = new Label("Email:");
        //lb_email.setFont(new Font(20));
        //lb_email.setTextFill(Color.RED);
        TextField email = new TextField();
        root.add(lb_email, 1,2);
        root.add(email, 2,2);

        Label lb_password = new Label("Password:");
        PasswordField password = new PasswordField();
        root.add(lb_password, 1,3);
        root.add(password, 2,3);

        Label lb_date = new Label("Birthdate");
        DatePicker date = new DatePicker();
        root.add(lb_date, 1, 4);
        root.add(date, 2, 4);

        Label lb_country = new Label("Country:");
        ComboBox<String> country = new ComboBox<String>();
        country.getItems().add("India");
        country.getItems().add("USA");
        country.getItems().add("UK");
        country.getItems().add("Africa");
        country.getItems().add("Australia");
        country.setEditable(true);
        root.add(lb_country, 1,5);
        root.add(country, 2,5);


        Label lb_gender = new Label("Gender");
        ToggleGroup gender_group = new ToggleGroup();
        RadioButton male = new RadioButton("Male");
        RadioButton female = new RadioButton("Female");
        RadioButton other = new RadioButton("Other");
        male.setSelected(true);
        male.setToggleGroup(gender_group);
        female.setToggleGroup(gender_group);
        other.setToggleGroup(gender_group);

        root.add(lb_gender, 1, 6, 1, 3);
        root.add(male, 2, 6);
        root.add(female, 2, 7);
        root.add(other, 2, 8);

        Button submit = new Button("Submit");
        root.add(submit, 2, 9);

        Label messg = new Label();
        root.add(messg, 1, 10, 2, 1);

        submit.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                String textToSet = "";
                boolean flag = true;
                // TODO Auto-generated method stub
                if (name.getText().isEmpty()) {
                    textToSet += "Name cannot be empty!\n";
                    flag = false;
                }
                if (email.getText().isEmpty()) {
                    textToSet += "Email cannot be empty!\n";
                    flag = false;
                }
                if (password.getText().length() < 8) {
                    textToSet += "Password cannot be less than 8 characters!\n";
                    flag = false;
                }
                if (date.getValue() == null) {
                    textToSet += "Enter a valid date!\n";
                    flag = false;
                }
                if (country.getValue() == null) {
                    textToSet += "Enter a Country!\n";
                    flag = false;
                }
                if (flag == true) {
                    String SelectedGender = ((RadioButton)gender_group.getSelectedToggle()).getText();
                    try {
                        addToJCBC(name.getText(), email.getText(), password.getText(), date.getValue().toString(), country.getValue().toString(), SelectedGender);
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    textToSet = "Accepted!";
                }

                messg.setText(textToSet);
            }
        });

        Scene sc = new Scene(root);

        primaryStage.setScene(sc);
        primaryStage.setWidth(500);
        primaryStage.setHeight(800);
        primaryStage.show();
    }

    void addToJCBC(String name, String email, String password, String date, String country, String gender) throws Exception{
        try {
            Connection con;
            Class.forName("com.mysql.cj.jdbc.Driver").newInstance();
            con = DriverManager.getConnection("jdbc:mysql://localhost:3307/test", "root", "");
            Statement stmt = con.createStatement();
            stmt.executeUpdate("insert into form values('"+name+"', '"+email+"', '"+password+"', '"+date+"', '"+country+"', '"+gender+"');");
            stmt.close();
            con.close();
        }
        catch (Exception e) {
            // TODO: handle exception
        }
    }

}