Javafx - imprimir e pesquisar inteiros em array

Vamos imprimir um array numa janela gráfica
com o uso da biblioteca javafx, quem testar
este código ficará surpreso com a beleza
da interface, onde temos um textfield,
menu e botões bem organizado.
O programa  é indicado a quem
já possui bons conhecimentos de java.

Veja abaixo imagens do programa em execução:

Veja abaixo o código do programa:

import java.util.Arrays;

import javafx.application.Application;

import javafx.concurrent.Task;

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.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.paint.Color;

import javafx.scene.text.Font;

import javafx.scene.text.FontWeight;

import javafx.stage.Stage;

import javafx.scene.control.Button;

import javafx.scene.Node;

import javafx.geometry.Insets;

import javafx.scene.layout.HBox;

import java.util.function.UnaryOperator;

import javafx.scene.control.TextFormatter;

import javafx.scene.control.TextFormatter.Change;

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

public class PROJETO extends Application {

     static Stage stage;

     static String str = "";

     static String str_1 = "MUITO OBRIGADO";

     static String str_3 = "Por: Samuel Lima";

     static String str_2 = "";

     static String str_4 = "";

     static int a = 0, b = 0, c = 0, d = 0, i, n = 100, y = 0;

     static int vet [ ] = new int [ n ];

     static Button btn_2 = new Button ( "cls" );

     static TextField textField = new TextField ( );

     static HBox hbox = new HBox ( textField );

     static BorderPane borderPane = new BorderPane ( );

     static Canvas canvas = new Canvas ( 690, 390 );

     static GraphicsContext ctx = canvas.getGraphicsContext2D ( );

     static Pane root = new Pane ( );

     static Scene scene = new Scene ( root, 660, 340 );

     static MenuBar menuBar = new MenuBar ( );

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

     // Chamando uma função depois de um certo tempo

     public static void Tempo_3 ( ) {

         ctx.setFill ( Color.RED );

         ctx.fillText ( str_1, 280, 320 );

     }

     public static void Tempo_2 ( ) {

         ctx.setFill ( Color.BLUE );

         ctx.fillText ( str_3, 280, 300 );

     }

     public static void Tempo_1 ( ) {

         // Coluna, linha, comprimento, altura

         // Apagando uma linha ou partes

         ctx.clearRect ( 150, 330, 300, 60 );

     }

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

     public static int Sleep ( int x, int k ) {

         Task < Integer > close = new Task < Integer > ( ) {

              @Override

              protected Integer call ( ) throws Exception {

                   Thread.sleep ( x );

                   return null;

              }

         };

         close.setOnSucceeded ( c -> {

              if ( k == 1 )

                   Tempo_1 ( );

              if ( k == 2 )

                   Tempo_2 ( );

              if ( k == 3 )

                   Tempo_3 ( );

         } );

         new Thread ( close ).start ( );

         return 0;

     }

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

     public static Node But_ton_2 ( ) {

         Button btn_2 = new Button ( "cls" );

         btn_2.setPrefWidth ( 50 );// Largura do botão

         btn_2.setLayoutX ( 21 );// Posição do botão

         btn_2.setPrefHeight ( 20 );// altura do botão

         btn_2.setLayoutY ( 305 );// //Posição do botão

         btn_2.setOnAction ( new EventHandler < ActionEvent > ( ) {

              @Override

              public void handle ( ActionEvent event ) {

                   // Coluna, linha, comprimento, altura

                   // Apagando uma linha ou partes

                   ctx.clearRect ( 150, 270, 400, 60 );

                   textField.clear ( );

              }

         } );

         root.getChildren ( ).add ( btn_2 );

         return btn_2;

     }

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

     public static void Line ( ) {

         for ( i = 1; i <= n; i++ ) {

              vet [ a ] = i;

              a++;

         }

         for ( i = 0; i < n; i++ ) {

              if ( i == 20 )

                   str += ( "\n" );

              if ( i == 40 )

                   str += ( "\n" );

              if ( i == 60 )

                   str += ( "\n" );

              if ( i == 80 )

                   str += ( "\n" );

              if ( i >= 20 && i <= 100 ) {

                   str += ( "  " );

                   str = str + vet [ i ];

              }

              if ( i >= 0 && i <= 19 ) {

                   str += ( "   " );

                   str = str + vet [ i ];

              }

         }

         ctx.setFill ( Color.BLACK );

         ctx.fillText ( str, 70, 110 );

     }

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

     public static int Menu_Bar ( ) {

         EventHandler < ActionEvent > action = changeTabPlacement ( );

         Menu menu = new Menu ( "Arq" );

         MenuItem top = new MenuItem ( "Exit" );

         top.setOnAction ( action );

         menu.getItems ( ).add ( top );

         MenuItem bottom = new MenuItem ( "Inf" );

         bottom.setOnAction ( action );

         menu.getItems ( ).add ( bottom );

         menuBar.getMenus ( ).add ( menu );

         root.prefHeightProperty ( ).bind ( scene.heightProperty ( ) );

         root.prefWidthProperty ( ).bind ( scene.widthProperty ( ) );

         borderPane.setTop ( menuBar );

         return 0;

     }

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

     private static EventHandler < ActionEvent > changeTabPlacement ( ) {

         return new EventHandler < ActionEvent > ( ) {

              public void handle ( ActionEvent event ) {

                   MenuItem mItem = ( MenuItem ) event.getSource ( );

                   String side = mItem.getText ( );

                   int b = 0;

                   if ( "Exit".equalsIgnoreCase ( side ) ) {

                        System.exit ( 0 );

                   } else if ( "Inf".equalsIgnoreCase ( side ) ) {

                        textField.clear ( );

                        But_ton_2 ( );

                        b = 3;

                        Sleep ( 2800, b );

                        b = 2;

                        Sleep ( 1800, b );

                        b = 4;

                        Sleep ( 1800, b );

                   }

              }

         };

     }

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

     public static void limitTextField ( TextField textField, int limit ) {

         UnaryOperator < Change > textLimitFilter = change -> {

              if ( change.isContentChange ( ) ) {

                   int newLength = change.getControlNewText ( ).length ( );

                   if ( newLength > limit ) {

                        String trimmedText = change.getControlNewText ( )

                                 .substring ( 0, limit );

                        change.setText ( trimmedText );

                        int oldLength = change.getControlText ( ).length ( );

                        change.setRange ( 0, oldLength );

                   }

              }

              return change;

         };

         textField.setTextFormatter ( new TextFormatter < Object > (

                   textLimitFilter ) );

     }

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

     private static int Bind ( ) {

         textField.setOnKeyPressed ( new EventHandler < KeyEvent > ( ) {

              @Override

              public void handle ( KeyEvent event ) {

                   //Limita o total de caracteres do textfield

                   limitTextField ( textField, 3 );

                   // textField.setPrefColumnCount ( 3 );

                   if ( event.getCode ( ) == KeyCode.ENTER ) {

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

                        ctx.setFill ( Color.BLUE );

                        y = textField.getText ( ).length ( );

                        // convertendo string para inteiro

                        int r = Integer.parseInt ( textField.getText ( ) );

                        if ( Integer.parseInt ( textField.getText ( ) ) > 0

                                 && Integer.parseInt ( textField.getText ( ) ) < 101 ) {

                            int index = Arrays.binarySearch ( vet, r );

                            System.out.printf("\n%d", index );

                            str_4 += "ª";

                            if ( y == 3 ) {

                                a = 275;

                                b = 415;

                                c = 430;

                                d = 390;

                            }

                            if ( y == 2 ) {

                                a = 260;

                                b = 385;

                                c = 400;

                                d = 370;

                            }

                            if ( y == 1 ) {

                                a = 260;

                                b = 380;

                                c = 395;

                                d = 370;

                            }

                            String st = Integer.toString ( index + 1 );

                            ctx.fillText ( "O número", 175, 280 );

                            ctx.setFill ( Color.RED );

                            ctx.fillText ( st, 240, 280 );

                            ctx.setFill ( Color.BLUE );

                            ctx.fillText ( "Foi encontrado na", a, 280 );

                            ctx.setFill ( Color.RED );

                            ctx.fillText ( str_4, b, 285 );

                            String s_t = Integer.toString ( index + 1);

                            ctx.setFill ( Color.RED );

                            ctx.fillText ( s_t, d, 280 );

                            ctx.setFill ( Color.BLUE );

                            ctx.fillText ( "posição do array", c, 280 );

                            But_ton_2 ( );

                        }

                   }

                   str_4 = "";

              }

         } );

         return 0;

     }

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

     @Override

     public void start ( Stage stage ) {

         ctx.setLineWidth ( 18.0 );

         ctx.setStroke ( Color.BLUE );

         ctx.strokeRoundRect ( 10, 10, 650, 330, 20, 0 );

         stage.setTitle ( "ARRAY: IMPRIMIR E PESQUISAR II" );

         stage.setScene ( scene );

         stage.setResizable ( false );

         Menu_Bar ( );

         ctx.setFill ( Color.RED );

         ctx.setFont ( Font.font ( "Serif", FontWeight.BOLD, 20 ) );

         ctx.fillText ( "ARRAY: IMPRIMIR E PESQUISAR II", 150, 50 );

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

         ctx.setFill ( Color.BLUE );

         ctx.fillText ( "IMPRIMINDO O ARRAY ABAIXO", 220, 80 );

         Line ( );

         textField.setPrefColumnCount ( 2 );

         Bind ( );

         root.getChildren ( ).add ( canvas );

         hbox.setPadding ( new Insets ( 220, 0, 10, 100 ) );

         ctx.setFont ( Font.font ( "Tahoma", FontWeight.NORMAL, 12 ) );

         ctx.setFill ( Color.RED );

         ctx.fillText ( "Digite um número para pesquisar", 100, 210 );

         ctx.setFill ( Color.BLUE );

         ctx.fillText ( "Enter", 150, 240 );

         root.getChildren ( ).add ( hbox );

         borderPane.setPadding ( new Insets ( 19, 0, 10, 19 ) );

         root.getChildren ( ).addAll ( borderPane );

         stage.show ( );

     }

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

     public static void main ( String [ ] args ) {

         Application.launch ( args );

     }

}