JavaFX - contador crescente até 59

Este duplo contador faz suas contagens

entre 0 e 59 com retorno.

O código é didático e serve como auxílio

para aplicações onde se necessita de

um bom contador.

Veja um vídeo do programa funcionando:

Veja abaixo o código do programa:

import javafx.application.Application;

import javafx.event.ActionEvent;

import javafx.scene.Scene;

import javafx.scene.canvas.Canvas;

import javafx.scene.canvas.GraphicsContext;

import javafx.stage.Stage;

import javafx.animation.KeyFrame;

import javafx.animation.Timeline;

import javafx.event.EventHandler;

import javafx.scene.paint.Color;

import javafx.util.Duration;

import javafx.scene.layout.BorderPane;

import javafx.scene.layout.Pane;

import javafx.scene.text.Font;

import javafx.scene.text.FontWeight;

import javafx.scene.text.Text;

import javafx.animation.*;

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

public class PROJETO extends Application {

     private static Timeline     videoTick_1;

     static int a = 0, b = 0, c = 0, d = 0, k = 0, w = 0;

     static String str_0 = "";

     static String str_1 = "";

     static Canvas canvas = new Canvas ( 490, 310 );

     static GraphicsContext           ctx           = canvas.getGraphicsContext2D ( );

     static BorderPane                borderPane    = new BorderPane ( );

     static Pane                           ro_ot         = new Pane ( );

     static Scene                     sce_ne        = new Scene ( ro_ot, 490, 310, Color.WHITE );

     static Text text1 = new Text ( ) ;

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

     public static int Apaga ( int tam_lin_ini, int tam_lin_fim,

              int tam_ini_col, int tam_fim_col, int cp, int at ) {

         int i, c;

         for ( i = tam_lin_ini; i < tam_lin_fim; i++ ) {

              for ( c = tam_ini_col; c < tam_fim_col; c++ ) {

                   // Coluna, linha, comprimento, altura

                   ctx.clearRect ( c, i, cp, at );

              }

         }

         return 0;

     }

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

     //Abaixo a função usada como clock criada por mim

     public static int Sleep_1 ( int x ) {    

         ctx.setFont ( Font.font ( "Tahoma", FontWeight.NORMAL, 40 ) );

         Duration duration = Duration.millis ( x );

         do{      

              videoTick_1 = new Timeline ( new KeyFrame ( duration,

                        new EventHandler < ActionEvent > ( ) {

                   public void handle ( ActionEvent actionEvent ) {

                        w += str_0.length ( );

                        str_0 += k;  

                        Apaga ( 220, 260, 0, 230 - w, 150, 60 );

                        ctx.setFill ( Color.BLUE );

                        ctx.fillText ( "0", 218, 250 );

                        if ( k > 9 ) {

                            //Apaga está apagando o "0" acima imprimido

                            //quando o contador chega no 10

                            Apaga ( 220, 260, 210, 300 - w, 150, 60 );

                            a = 25;

                        }

                        text1.setStyle("-fx-font: normal bold 20px 'serif' ");

                        ctx.setFill ( Color.BLUE );

                        ctx.fillText ( str_0, 240 - a, 250 );

                        str_0 = str_0.substring ( 0, w  );

                        k++;

                        System.out.println ( k );  

                        if ( k == 60 ){

                            //As variáveis são resetadas para

                            // o retorno do contador

                            k = 0;

                            a = 0;

                        }

                        b += str_1.length ( );

                        str_1 += c;  

                        ctx.setFill ( Color.RED );

                        ctx.fillText ( "0", 278, 250 );

                        if ( c > 9 ) {

                            //Apaga está apagando o "0" acima imprimido

                            //quando o contador chega no 10

                            Apaga ( 220, 260, 270, 300 - b, 150, 60 );

                            d = 25;

                        }

                        text1.setStyle("-fx-font: normal bold 20px 'serif' ");

                        ctx.setFill ( Color.RED );

                        ctx.fillText ( str_1, 300 - d, 250 );

                        str_1 = str_1.substring ( 0, b  );

                        c++;

                        System.out.println ( c );  

                        if ( c == 60 ){

                            //As variáveis são resetadas para

                            // o retorno do contador

                            c = 0;

                            d = 0;

                        }

                   }

              } ) );

              videoTick_1.setCycleCount ( Animation.INDEFINITE );

              videoTick_1.playFromStart ( );

              return k;

         }while ( true );  

     }

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

     public void start ( Stage stage ) {

         stage.setTitle ( "JAVAFX - CONTADOR CRESCENTE ATÉ 59" );

         // Dando uns efeitos na moldura

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

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

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

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

         ctx.setFill ( Color.RED );

         ctx.fillText ( "JAVAFX - CONTADOR CRESCENTE ATÉ 59", 120, 60 );

         Sleep_1 ( 1000 ); 

         ro_ot.getChildren ( ).addAll ( canvas, borderPane );

         stage.setScene ( sce_ne );

         stage.show ( );   

     }

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

     public static void main ( String [ ] args ) {

         Application.launch ( args );

     }

}