Could you please help on this Java program? I did the program in eclipse. Howeve

Question

Could you please help on this Java program? I did the program in eclipse. However, it doesn’t run. I am sure I did a mistake linking images (I placed all the cards in the bin folder)- please see below my program. Please help me, I really appreciate your help.

(pick 4 cards) Write a program that lets the user click the Refresh button to display four cards from a deck of 52 cards.

Hint: Write a program that displays three cards randomly selected from a deck of 52, (three cards should show in line). The card image files are named 1.png.2.png…. 52.png and stored in the image/card directory. All three cards are distinct and selected randomly. Hint: You can select random cards by storing the numbers 1-52 to an array list, perform a random shuffle and use the first three numbers in the array list as the file names for the image.

import javafx.application.Application;

import javafx.stage.Stage;

import javafx.scene.Scene;

import javafx.scene.image.Image;

import javafx.scene.image.ImageView;

import javafx.scene.layout.HBox;

import javafx.scene.layout.VBox;

import javafx.geometry.Insets;

import javafx.geometry.Pos;

import javafx.scene.control.Button;

import java.util.ArrayList;

public class Exercise_15_01 extends Application {

       @Override // Override the start method in the Application class

       public void start(Stage primaryStage) {

              // Create a VBox

              VBox vBox = new VBox();

              vBox.setAlignment(Pos.CENTER);

              vBox.setPadding(new Insets(5, 5, 5, 5));

              // Create a HBox

              HBox hBox = new HBox(5);

              hBox.setAlignment(Pos.CENTER);

              hBox.setPadding(new Insets(5, 5, 5, 5));

              getCards(hBox);

              // Create a button

              Button btRefresh = new Button("Refresh");

              // Process events

              btRefresh.setOnAction(e -> getCards(hBox));

              // Place nodes in vbox

              vBox.getChildren().addAll(hBox, btRefresh);

              // Create a scene and place it in the stage

              Scene scene = new Scene(vBox);

              primaryStage.setTitle("Exercise_15_01"); // Set the stage title

              primaryStage.setScene(scene); // Place the scene in the stage

              primaryStage.show(); // Display the stage

       }

       /** Returns a list with numbers 1-52 stored in random order */

       private void getCards(HBox pane) {

              pane.getChildren().clear();

              // Create a deck of card

              ArrayList<Integer> cards = new ArrayList<>();

              for (int i = 0; i < 52; i++) {

                     cards.add(i + 1);

              }

              // shuffle deck

              java.util.Collections.shuffle(cards);

              // Add nodes to pane

              for (int i = 0; i < 4; i++) {

                     pane.getChildren().add(new ImageView(new

// I think problem is directing png images//

Image("file:C:\Users\eclipse-workspace\exercise15_1\bin/" + cards.get(i) + ".png")));

              }

       }

}

Explanation / Answer

import javafx.application.Application;

import javafx.geometry.Insets;

import javafx.geometry.Pos;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.image.Image;

import javafx.scene.image.ImageView;

import javafx.scene.layout.BorderPane;

import javafx.scene.layout.HBox;

import javafx.stage.Stage;

public class Exercise_01 extends Application {

        public void start(Stage primaryStage) {

        HBox hBox = new HBox();

        hBox.setAlignment(Pos.CENTER);

        hBox.setSpacing(10);

        setRandomCards(hBox);

        HBox buttons = new HBox();

        buttons.setAlignment(Pos.BOTTOM_CENTER);

        buttons.setSpacing(10);

        Button btRefresh = new Button("Refresh");

        btRefresh.setOnAction(e -> setRandomCards(hBox));

        buttons.getChildren().add(btRefresh);

        BorderPane borderPane = new BorderPane();

        borderPane.setCenter(hBox);

        borderPane.setBottom(buttons);

        BorderPane.setMargin(buttons, new Insets(10, 10, 10, 10));

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

        borderPane.autosize();

        Scene scene = new Scene(borderPane, borderPane.getPrefWidth(), borderPane.getPrefHeight());

        primaryStage.setTitle("3 Random Cards");

      primaryStage.setScene(scene);

        primaryStage.show();

    }

    private void setRandomCards(HBox pane){

        boolean[] usedCards = new boolean[52];

        // choose 3 random distinct cards from the deck

        int count = 0;

        pane.getChildren().clear();

        while (count < 4) {

            int card = (int) (Math.random() * 52);

            if (!usedCards[card]) {

                usedCards[card] = true;

                // card png files start from 1, so increment card by one for the correct file name.

                pane.getChildren().add(new ImageView(new Image("image/card/" + (++card) + ".png")));

                count++;

            }

        }

    }

    public static void main(String[] args) {

        Application.launch(args);

    }

}

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