Write a program that lets the user click the Refresh button to display four card

Question

Write a program that lets the user click the Refresh button to display four cards from a deck of 52 cards, (see the hint in Programming below on how to obtain four random cards.)

Write a program that displays three cards randomly selected from a deck of 52,(three random cards). 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 introduced in section 11.12 and use the first three numbers in the array list as the file names for the image.

Explanation / Answer

Please find the below code

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.geometry.Insets;

import java.util.ArrayList;

public class Exercise_14_03 extends Application {

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

                public void start(Stage primaryStage) {

                                                                                                                // Create a number of card numbers

                                ArrayList<Integer> cards = getCards();

                                                                                                                // Create a HBox pane

                                HBox pane = new HBox(5);

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

                                                                for (int i = 0; i < 3; i++) {

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

                                                                cards.get(i) + ".png")));

                                }

                                Scene scene = new Scene(pane);

                                primaryStage.setTitle("Exercise_14_03"); // Set the stage title

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

                                primaryStage.show(); // Display the stage

                }

                private ArrayList<Integer> getCards() {

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

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

                                                cards.add(i + 1);

                                }

                                java.util.Collections.shuffle(cards);

                                return cards;

                }

}

Please find the below code also

package Chapter_15;

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

{

    @Override

    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];

        int count = 0;

        pane.getChildren().clear();

        while (count < 4) {

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

            if (!usedCards[card]) {

                usedCards[card] = true;

                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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