JavaFx - abrindo um novo stage

Veja abaixo imagens do programa em execução:

Veja abaixo o código do programa:

import javafx.application.Application;

import javafx.stage.Stage;

import javafx.scene.Scene;

import javafx.scene.canvas.Canvas;

import javafx.scene.canvas.GraphicsContext;

import javafx.scene.paint.Color;

import javafx.scene.text.Font;

import javafx.scene.text.FontWeight;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

import javafx.scene.control.Menu;

import javafx.scene.control.MenuBar;

import javafx.scene.control.MenuItem;

import javafx.scene.layout.BorderPane;

import javafx.scene.input.KeyCodeCombination;

import javafx.scene.input.KeyCombination;

import javafx.scene.input.KeyCode;

class NewStage {

     NewStage ( ) {

         BorderPane root = new BorderPane ( );

         Scene scene = new Scene ( root, 360, 265 );

         Stage subStage = new Stage ( );

         subStage.setTitle ( "JAVAFX - NEW STAGE" );

         Canvas canvas = new Canvas ( 390, 300 );

         GraphicsContext ctx = canvas.getGraphicsContext2D ( );

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

         ctx.setFill ( Color.RED );

         ctx.fillText ( "JAVAFX - NEW STAGE", 100, 80 );

         ctx.setFill ( Color.BLUE );

         ctx.fillText ( "Por: Samuel Lima", 140, 180 );

         ctx.setFill ( Color.GREEN );

         ctx.fillText ( "Muito obrigado", 140, 220 );

         // Criando uma moldura na janela

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

                   + "-fx-border-width: 10;" + "-fx-border-insets: 5;"

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

         root.getChildren ( ).add ( canvas );

         subStage.setScene ( scene );

         subStage.show ( );

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

         MenuBar m_nu_1 = new MenuBar ( );

         Menu m_nu = new Menu ( "Arq" );

         MenuItem exd = new MenuItem ( "Sair" );

         MenuItem te_d = new MenuItem ( "Pesquisar" );

         m_nu.getItems ( ).addAll ( te_d, exd );

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

         m_nu_1.getMenus ( ).add ( m_nu );

         root.setTop ( m_nu_1 );

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

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

              @Override

              public void handle ( ActionEvent e ) {

                   System.exit ( 0 );

              }

         } );

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

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

              @Override

              public void handle ( ActionEvent e ) {

                   new NewStage ( );

              }

         } );

         exd.setAccelerator ( new KeyCodeCombination ( KeyCode.E,

                   KeyCombination.CONTROL_DOWN ) );

         te_d.setAccelerator ( new KeyCodeCombination ( KeyCode.C,

                   KeyCombination.CONTROL_DOWN ) );

     }

}

public class PROJETO extends Application {

     Canvas canvas = new Canvas ( 490, 300 );

     GraphicsContext ctx = canvas.getGraphicsContext2D ( );

     BorderPane root = new BorderPane ( );

     Scene scene = new Scene ( root, 490, 300 );

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

     public void start ( Stage stage ) {

         stage.setTitle ( "JAVAFX - STAGE PRINCIPAL" );

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

         ctx.setFill ( Color.RED );

         ctx.fillText ( "JAVAFX - STAGE PRINCIPAL", 140, 80 );

         // Criando uma moldura no texarea

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

                   + "-fx-border-width: 18;" + "-fx-border-insets: 5;"

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

         stage.setScene ( scene );

         root.getChildren ( ).add ( canvas );

         stage.show ( );

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

         MenuBar m_nu_1 = new MenuBar ( );

         Menu m_nu = new Menu ( "Arq" );

         MenuItem exd = new MenuItem ( "Sair" );

         MenuItem te_d = new MenuItem ( "Pesquisar" );

         m_nu.getItems ( ).addAll ( te_d, exd );

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

         m_nu_1.getMenus ( ).add ( m_nu );

         root.setTop ( m_nu_1 );

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

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

              @Override

              public void handle ( ActionEvent e ) {

                   stage.close ( );

              }

         } );

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

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

              @Override

              public void handle ( ActionEvent e ) {

                   new NewStage ( );

              }

         } );

         exd.setAccelerator ( new KeyCodeCombination ( KeyCode.E,

                   KeyCombination.CONTROL_DOWN ) );

         te_d.setAccelerator ( new KeyCodeCombination ( KeyCode.C,

                   KeyCombination.CONTROL_DOWN ) );

     }

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

     public static void main ( String [ ] args ) {

         Application.launch ( args );

     }

}