试图从阵列列表中汲取图像并分配值

Question

我正在创建一个匹配的纸牌游戏，并试图为卡本身分配一个值从阵列列表中拉出图像并在单击卡时显示。我是代码的新手，因此将不胜感激

import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.layout.GridPane;
import javafx.scene.control.Button;
import javafx.scene.control.Label; 
import javafx.scene.image.Image;
import java.io.File;
import java.io.IOException;
import javafx.scene.image.ImageView;
import java.util.Random;
import java.util.ArrayList;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import java.util.*;
import javafx.geometry.Insets;


public class FinalProject extends Application
{
    private Button button = new Button();
    private Button button1 = new Button();
    private Button button2 = new Button();
    private Button button3 = new Button();
    private Button button4 = new Button();
    private Label label;
    private int value;
    private ImageView Clubs2IView;
    private ImageView Diamonds2IView;
    private ImageView Clubs3IView;
    private ImageView Diamonds3IView;
    private ArrayList<String> Cards;
    private Image backCard;
    private ImageView backCardIView;
    private ImageView backCardIView1;
    private ImageView backCardIView2;
    private ImageView backCardIView3;
    private int ran = rng();
    private int ran1 = rng();
    private int ran2 = rng();
    private int ran3 = rng();
    private int counter = 0;
    private int counter1 = 0;
    
    public static void main(String[] args)
    {
        launch(args);
    }
    
    public static int rng()
    {
        Random random = new Random();
        int ran = random.nextInt(4);
        return ran;
    }
    
    @Override
    public void start(Stage primaryStage)
    {
        GridPane gridpane = new GridPane();
        gridpane.setAlignment(Pos.CENTER);
        
        gridpane.add(button, 0, 0);
        gridpane.add(button1, 2, 0);
        gridpane.add(button2, 0, 1);
        gridpane.add(button3, 2, 1);
        
        backCard = new Image("file:backCard.jpg");
        
        backCardIView = new ImageView(backCard);
        backCardIView1 = new ImageView(backCard);
        backCardIView2 = new ImageView(backCard);
        backCardIView3 = new ImageView(backCard);
        
        backCardIView.setFitWidth(100);
        backCardIView.setPreserveRatio(true);
        backCardIView1.setFitWidth(100);
        backCardIView1.setPreserveRatio(true);
        backCardIView2.setFitWidth(100);
        backCardIView2.setPreserveRatio(true);
        backCardIView3.setFitWidth(100);
        backCardIView3.setPreserveRatio(true);
        
        button.setGraphic(backCardIView);
        button1.setGraphic(backCardIView1);
        button2.setGraphic(backCardIView2);
        button3.setGraphic(backCardIView3);
        
        Cards = new ArrayList<String>();
            Cards.add("2_Clubs.jpg");
            Cards.add("2_Diamonds.jpg");
            Cards.add("3_Clubs.jpg");
            Cards.add("3_Diamonds.jpg");
            java.util.Collections.shuffle(Cards);
    
        button.setOnAction(new EventHandler<ActionEvent>()
        {
            @Override
            public void handle(ActionEvent event)
            {
                Cards.get(0);
                Cards.remove(0);
                
                counter++;
                if(counter == 2)
                {
                    
                }
            }
        });
        
        button1.setOnAction(new EventHandler<ActionEvent>()
        {
            @Override
            public void handle(ActionEvent event)
            {
                Cards.get(1);
                
                Cards.remove(1);
            }
        });
        
        button2.setOnAction(new EventHandler<ActionEvent>()
        {
            @Override
            public void handle(ActionEvent event)
            {
                Cards.get(2);
                
                Cards.remove(2);
            }
        });
        
        button3.setOnAction(new EventHandler<ActionEvent>()
        {
            @Override
            public void handle(ActionEvent event)
            {
                Cards.get(3);
                
                Cards.remove(3);
            }
        });
        Scene scene = new Scene(gridpane);
        
        primaryStage.setScene(scene);
        primaryStage.setTitle("Matching");
        primaryStage.show();
    }
    
}```