Create a simple login screen in JavaFX

loginexample.java

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.scene.text.Text;
import javafx.stage.Stage;

/**
 * Copyright (C) 2017  Sw4p
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * @author Sw4p
 *
 */
public class LoginExample extends Application{

	@Override public void start(Stage primaryStage) {
		primaryStage.setTitle("Example Login screen"); // Set Title
		
		//Create Grid 
		GridPane grid = new GridPane();
		grid.setAlignment(Pos.CENTER);
		grid.setHgap(10);
		grid.setVgap(10);
		grid.setPadding(new Insets(25, 25, 25, 25));

		// create Scene
		Scene scene = new Scene(grid, 350, 200);
		primaryStage.setScene(scene); // Set Scene
		
		// Create and add Title
		Text scenetitle = new Text("Welcome");
		scenetitle.setFont(Font.font("Tahoma", FontWeight.NORMAL, 20));
		grid.add(scenetitle, 0, 0, 2, 1);

		// Create and add User field
		Label userName = new Label("User Name:");
		grid.add(userName, 0, 1);
		TextField userTextField = new TextField();
		grid.add(userTextField, 1, 1);

		// Create and add Pass field
		Label pw = new Label("Password:");
		grid.add(pw, 0, 2);
		PasswordField pwBox = new PasswordField();
		grid.add(pwBox, 1, 2);
		
		// Create and add Sign in button
		Button signButton = new Button("Sign in");
		HBox hbBtn = new HBox(10);
		hbBtn.setAlignment(Pos.BOTTOM_RIGHT);
		hbBtn.getChildren().add(signButton);
		grid.add(hbBtn, 1, 4);
		
		// Show the stage
		primaryStage.show();
	}
	
	
	public static void main(String[] args) {
		launch(args);
	}
}