javafx code for basic login

Main.java

package application;
	
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.geometry.Pos;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;

import javafx.application.Application;
import javafx.beans.binding.NumberBinding;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.Group;
import javafx.stage.Stage;
 
public class Main extends Application
{
    public static void main(String[] args) 
    {
        Application.launch(args);
    }
     
    @Override
    public void start(Stage stage) 
    {
        // Create the Label for the Name
        Label nameLbl = new Label("Name:");
        // Set the location for the Label
        nameLbl.setLayoutX(10);     
        nameLbl.setLayoutY(10);     
         
        // Create the TextField for the Name
        TextField nameFld = new TextField();
         
        // Set the location of the Name TextField relative to the Name Label
        NumberBinding nameFldXBinding =
            nameLbl.layoutXProperty().add(nameLbl.widthProperty().add(10));
            nameFld.layoutXProperty().bind(nameFldXBinding);
            nameFld.layoutYProperty().bind(nameLbl.layoutYProperty());
                 
        // Create the Label for the Password
        Label passwordLbl = new Label("Password:");
 
        // Set the location of the Password Label relative to the Name TextField
        NumberBinding passwordLblXBinding =
            nameFld.layoutXProperty().add(nameFld.widthProperty().add(10));
            passwordLbl.layoutXProperty().bind(passwordLblXBinding);
            passwordLbl.layoutYProperty().bind(nameFld.layoutYProperty());
         
        // Create the TextField for the Password
        TextField passwordFld = new TextField();
 
        // Set the location of the Password TextField relative to the Password Label
        NumberBinding passwordFldXBinding =
            passwordLbl.layoutXProperty().add(passwordLbl.widthProperty().add(10));
            passwordFld.layoutXProperty().bind(passwordFldXBinding);
            passwordFld.layoutYProperty().bind(passwordLbl.layoutYProperty());
         
        // Create the Login-Button
        Button loginBtn = new Button("Login");
        EventHandler<ActionEvent> event = new EventHandler<ActionEvent>() { 
            public void handle(ActionEvent e) 
            { 
                System.out.println("username: "+ nameFld.getText()+"\npassword: "+passwordFld.getText()); 
            } 
        }; 
  
        // when button is pressed 
        loginBtn.setOnAction(event); 
        
 
        // Set the location of the Login Button relative to the Password TextField
        NumberBinding loginBtnXBinding =
            passwordFld.layoutXProperty().add(passwordFld.widthProperty().add(10));
            loginBtn.layoutXProperty().bind(loginBtnXBinding);
            loginBtn.layoutYProperty().bind(passwordFld.layoutYProperty());
         
        // Create the Group 
        Group root = new Group();       
        // Add the children to the Group
        root.getChildren().addAll(nameLbl, nameFld, passwordLbl, passwordFld, loginBtn);
                 
        // Create the Scene
        Scene scene = new Scene(root,600,100);
        // Add the scene to the Stage
        stage.setScene(scene);
        // Set the title of the Stage
        stage.setTitle("A Group Example");
        // Display the Stage
        stage.show();
    }
}