使用JavaFX时无法打开可运行的JAR

Question

我正在尝试制作类似于Wumpus的游戏，到目前为止，它在Eclipse中完美运行。我目前仅将JavaFX用于其Media和MediaPlayer类。我决定将游戏导出为可运行的JAR，看它是否可以运行，但是当我双击JAR来运行程序时，什么也没发生。但是，如果我通过命令提示符运行了可运行的JAR文件，则该程序打开并运行良好。当我返回代码时，删除了所有与JavaFX相关的内容，然后将其导出为可运行的JAR，JAR打开并且程序运行正常，不需要任何命令提示符。如果有人可以帮助我弄清楚为什么会发生这种情况以及如何解决此问题，将不胜感激！这是主类的代码，如果有帮助的话（可能真的很混乱）

package game;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;

import javafx.application.Application;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.stage.Stage;

public class Game extends Application implements ActionListener, KeyListener {

public static Game game;
private JFrame frame;
private Timer timer;
private Renderer renderer;
private Tile[][] tiles;
private Player player;
private Media themeSong;
private MediaPlayer musicPlayer;
public JLabel explosionGIF;

public Game() {
    frame = new JFrame(GameData.FRAME_NAME);
    explosionGIF = new JLabel();
    timer = new Timer(GameData.UPDATE_SPEED_MS, this);
    renderer = new Renderer();
    renderer.setPreferredSize(new Dimension(GameData.FRAME_WIDTH, GameData.FRAME_HEIGHT));
    frame.add(renderer);
    frame.setResizable(true);
    frame.setVisible(true);
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.addKeyListener(this);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    initialize();
    timer.start();
}

private void initialize() {
    tiles = new Tile[GameData.TILE_AMOUNT][GameData.TILE_AMOUNT];
    for (int r = 0; r < tiles.length; r++) {
        for (int c = 0; c < tiles[r].length; c++) {
            tiles[r][c] = new Tile(r, c);
        }
    }
    player = new Player();
    GameData.FRAME_WIDTH_DIFFERENCE = frame.getWidth() - GameData.FRAME_WIDTH;
    GameData.FRAME_HEIGHT_DIFFERENCE = frame.getHeight() - GameData.FRAME_HEIGHT;
}

private void startMusic() {

    musicPlayer.play();
}

public void render(Graphics g) {
    for (Tile[] tileArr : tiles)
        for (Tile tile : tileArr)
            tile.render(g);
    player.render(g);
}

private void update() {
    updateSize();
    if (musicPlayer != null && (musicPlayer.getCurrentTime().greaterThanOrEqualTo(musicPlayer.getStopTime())
            || musicPlayer.getCurrentTime().compareTo(musicPlayer.getStartTime()) == 0)) {
        startMusic();
    }
}

private void updateSize() {
    if (frame.getPreferredSize().getWidth() != GameData.FRAME_WIDTH
            || frame.getPreferredSize().getHeight() != GameData.FRAME_HEIGHT) {
        renderer.setPreferredSize(new Dimension(frame.getWidth() - GameData.FRAME_WIDTH_DIFFERENCE,
                frame.getHeight() - GameData.FRAME_HEIGHT_DIFFERENCE));
        GameData.FRAME_WIDTH = (int) frame.getWidth() - GameData.FRAME_WIDTH_DIFFERENCE;
        GameData.FRAME_HEIGHT = (int) frame.getHeight() - GameData.FRAME_HEIGHT_DIFFERENCE;
        GameData.TILE_WIDTH = GameData.FRAME_WIDTH / GameData.TILE_AMOUNT;
        GameData.TILE_HEIGHT = GameData.FRAME_HEIGHT / GameData.TILE_AMOUNT;
    }
}

@Override
public void keyTyped(KeyEvent e) {

}

@Override
public void keyPressed(KeyEvent e) {

}

@Override
public void keyReleased(KeyEvent e) {
    switch (e.getKeyCode()) {
    case KeyEvent.VK_LEFT:
        player.move(GameData.MovementDirections.LEFT);
        break;
    case KeyEvent.VK_RIGHT:
        player.move(GameData.MovementDirections.RIGHT);
        break;
    case KeyEvent.VK_UP:
        player.move(GameData.MovementDirections.UP);
        break;
    case KeyEvent.VK_DOWN:
        player.move(GameData.MovementDirections.DOWN);
        break;
    case KeyEvent.VK_SPACE:
        break;
    }
}

@Override
public void actionPerformed(ActionEvent e) {
    renderer.repaint();
    update();
}

public JFrame getFrame() {
    return frame;
}

public Tile[][] getTiles() {
    return tiles;
}

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            game = new Game();
        }
    });
    Application.launch();
}

@Override
public void start(Stage primaryStage) throws Exception {
    // TODO Auto-generated method stub
    themeSong = new Media(getClass().getResource("/sound/theme.mp3").toExternalForm());
    musicPlayer = new MediaPlayer(themeSong);
}

}