JavaFX - criando menu e item de menu

A habilidade clássica de selecionar
opções em programas com janelas gráficas
é através de menu.
A biblioteca javaFX oferece recursos
poderosos para criação de menus em estilo
profissional limitado apenas pelo
conhecimento do programador.
Neste exemplo estamos utilizando o recurso
de combinação de teclas para opcionalmente
selecionar um item de menu por atalhos de teclado.

Veja abaixo uma imagem do programa em execução: 

Veja abaixo o vídeo do programa:

Veja abaixo o código do programa:

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.util.ArrayList;

import java.util.Arrays;

import javafx.animation.KeyFrame;

import javafx.animation.Timeline;

import javafx.application.Application;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

import javafx.scene.Scene;

import javafx.scene.canvas.Canvas;

import javafx.scene.canvas.GraphicsContext;

import javafx.scene.control.Menu;

import javafx.scene.control.MenuBar;

import javafx.scene.control.MenuItem;

import javafx.scene.image.Image;

import javafx.scene.image.ImageView;

import javafx.scene.input.KeyCode;

import javafx.scene.input.KeyCodeCombination;

import javafx.scene.input.KeyCombination;

import javafx.scene.layout.BorderPane;

import javafx.scene.paint.Color;

import javafx.scene.text.Font;

import javafx.scene.text.FontWeight;

import javafx.stage.Stage;

import javafx.util.Duration;

public class PROJETO extends Application {

     Canvas canvas = new Canvas ( 690, 350 );

     GraphicsContext ctx = canvas.getGraphicsContext2D ( );

     BorderPane root = new BorderPane ( );

     Scene scene = new Scene ( root, 660, 350 );

     MenuBar menuBar = new MenuBar ( );

     Menu mainMenu = new Menu ( "Arq" );

     MenuItem sair = new MenuItem ( "Sair" );

     MenuItem texto = new MenuItem ( "Texto" );

     Menu main_Menu = new Menu ( "Sobre" );

     MenuItem vis_vet = new MenuItem ( "Autor" );

     MenuItem vis_vet_1 = new MenuItem ( "JavaFx" );

     Timeline videoTick;

     Duration duration = Duration.millis ( 2000 );

     public static ImageView imageView = new ImageView ( );

     // /////////////////////////////////////////////////////////////////////////

     public void Informe ( ) {

         ctx.setFont ( Font.font ( "Arial", FontWeight.NORMAL, 13 ) );

         ctx.setFill ( Color.RED );

         ctx.fillText ( "Por: ", 250, 275 );

         ctx.setFill ( Color.BLUE );

         ctx.fillText ( "Samuel Lima", 280, 275 );

         ctx.setFill ( Color.BLACK );

         ctx.fillText ( "sa_sp10@hotmail.com", 250, 290 );

         ctx.setFill ( Color.RED );

         ctx.fillText ( " MUITO OBRIGADO", 280, 320 );

         videoTick = new Timeline ( new KeyFrame ( duration,

                   new EventHandler < ActionEvent > ( ) {

              public void handle ( ActionEvent actionEvent ) {

                   // Limpando a tela

                   // Coluna, linha, comprimento, altura

                   ctx.clearRect ( 240, 260, 330, 150 );

                   Principal ( );

              }

         } ) );

         videoTick.playFromStart ( );

     }

     // /////////////////////////////////////////////////////////////////////////

     public void Texto ( ) {

         ctx.clearRect ( 210, 70, 330, 50 );

         ctx.setFont ( Font.font ( "Arial", FontWeight.BOLD, 15 ) );

         ctx.setFill ( Color.RED );

         ctx.fillText ( "JAVAFX - CRIANDO MENU E ITEM DE MENU", 180, 80 );

         ctx.setFill ( Color.BLUE );

         int i;

         StringBuilder st = new StringBuilder ( );

         ArrayList < Character > arr = new ArrayList <> ( Arrays.asList (            

                   'V', 'I', 'V', 'A', ' ', ' ',

                   'J', 'A', 'V', 'A', ' ', ' ',

                   'V', 'I', 'V', 'A', ' ', ' ',

                   'J', 'A', 'V', 'A', 'F', 'X' ) );

         for ( i = 0; i < arr.size ( ); i++ ) {

              if ( i % 6 == 0 ) {

                   st.append ( "\n" );

              }

              st.append ( arr.get ( i ) + " " );

         }

         ctx.fillText ( " " + st, 220, 110 );

         videoTick = new Timeline ( new KeyFrame ( duration,

                   new EventHandler < ActionEvent > ( ) {

              public void handle ( ActionEvent actionEvent ) {

                   // Limpando a tela

                   // Coluna, linha, comprimento, altura

                   ctx.clearRect ( 210, 100, 330, 150 );

                   Principal ( );

              }

         } ) );

         videoTick.playFromStart ( );

     }

     // /////////////////////////////////////////////////////////////////////////

     public void Menu ( Stage stage ) {

         mainMenu.getItems ( ).addAll ( texto, sair );

         main_Menu.getItems ( ).addAll ( vis_vet, vis_vet_1 );

         menuBar.getMenus ( ).add ( mainMenu );

         menuBar.getMenus ( ).add ( main_Menu );

         sair.setOnAction ( actionEvent -> System.exit ( 0 ) );

         texto.setOnAction ( actionEvent -> Texto ( ) );

         vis_vet.setOnAction ( actionEvent -> Informe ( ) );

         vis_vet_1.setOnAction ( new EventHandler < ActionEvent > ( ) {

              @Override

              public void handle ( ActionEvent e ) {

                   try {

                        Image_View ( );

                   } catch ( FileNotFoundException e1 ) {

                        // TODO Auto-generated catch block

                        e1.printStackTrace();

                   }

              }

         } );

         texto.setAccelerator ( new KeyCodeCombination ( KeyCode.A,

                   KeyCombination.CONTROL_DOWN ) );

         sair.setAccelerator ( new KeyCodeCombination ( KeyCode.B,

                   KeyCombination.CONTROL_DOWN ) );

         vis_vet.setAccelerator ( new KeyCodeCombination ( KeyCode.C,

                   KeyCombination.CONTROL_DOWN ) );

         vis_vet_1.setAccelerator ( new KeyCodeCombination ( KeyCode.D,

                   KeyCombination.CONTROL_DOWN ) );

     }

     // /////////////////////////////////////////////////////////////////////////

     public void Principal ( ) {

         ctx.setFont ( Font.font ( "Arial", FontWeight.BOLD, 15 ) );

         ctx.setFill ( Color.RED );

         ctx.fillText ( "JAVAFX - CRIANDO MENU E ITEM DE MENU", 180, 80 );

     }

     // /////////////////////////////////////////////////////////////////////////

     public int Image_View ( ) throws FileNotFoundException {

         Image image = new Image ( new FileInputStream (

         "H:\\eclipse - luna java\\PROJETOS\\PROJETO\\src\\Foto\\JFX.png" ) );

         imageView = new ImageView ( image );

         //Coluna

         imageView.setX ( 210 );

         //Linha

         imageView.setY ( 90 );

         //Largura

         imageView.setFitHeight ( 640 );

         //Altura

         imageView.setFitWidth ( 250 );

         imageView.setPreserveRatio ( true );

         videoTick = new Timeline ( new KeyFrame ( duration,

                   new EventHandler < ActionEvent > ( ) {

              public void handle ( ActionEvent actionEvent ) {

                   imageView.setVisible ( false );

                   Principal ( );

              }

         } ) );

         videoTick.playFromStart ( );

         root.getChildren ( ).addAll ( imageView );

         return 0;

     }

     // /////////////////////////////////////////////////////////////////////////

     public void start ( Stage stage ) {

         // Criando moldura e aplicando efeitos

         root.setStyle ( "-fx-padding: 5;" + "-fx-border-style: solid inside;"

                   + "-fx-border-width: 12;" + "-fx-border-insets: 5;"

                   + "-fx-border-radius: 5;" + "-fx-border-color: cyan;" );

         stage.setTitle ( "JAVAFX - CRIANDO MENU E ITEM DE MENU" );

         Principal ( );

         Menu ( stage );

         root.getChildren ( ).addAll ( canvas );

         root.setTop ( menuBar );

         stage.setScene ( scene );

         stage.show ( );

     }

     // /////////////////////////////////////////////////////////////////////////

     public static void main ( String [ ] args ) {

         launch ( args );

     }

}