为啥不能播放 java_用java做的基于vlcj内核的播放器，为什么无法播放视频

}

import java.awt.BorderLayout;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import uk.co.caprica.vlcj.component.EmbeddedMediaPlayerComponent;

import uk.co.caprica.vlcj.player.embedded.EmbeddedMediaPlayer;

public class MainWindow extends JFrame

{

/**

*

*/

private static final long serialVersionUID = 1L;

EmbeddedMediaPlayerComponent playerComponent;

// private static final long serialVersionUID = 1L;

private JPanel contentPane;

public MainWindow()

{

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 656, 397);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

contentPane.setLayout(new BorderLayout(0, 0));

setContentPane(contentPane);

JPanel videopane = new JPanel();

contentPane.add(videopane,BorderLayout.CENTER);

videopane.setLayout(new BorderLayout(0, 0));

playerComponent = new EmbeddedMediaPlayerComponent();

videopane.add(playerComponent);

}

public EmbeddedMediaPlayer getMediaPlayer()

{

return playerComponent.getMediaPlayer();

}

}