VLCJ-上一个曲目结束后，播放列表中的下一个项目将不会开始

Question

我正在编写一个使用VLCJ处理音频输出的音频播放器。

我可以播放音频，并且可以在播放当前轨道时跳到其他轨道（在下面的示例中使用next()）。

但是，如果我在当前曲目结束后致电next()。它将加载轨道，但轨道不会发出任何噪音。

之后，如果我手动跳至另一首曲目（再次使用next()），它会起作用。

这是一个最小的工作示例：

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

import com.sun.jna.NativeLibrary;

import uk.co.caprica.vlcj.component.AudioMediaPlayerComponent;
import uk.co.caprica.vlcj.player.MediaPlayer;
import uk.co.caprica.vlcj.player.MediaPlayerEventAdapter;
import uk.co.caprica.vlcj.runtime.RuntimeUtil;

public class VLCJFinishedBug {

    String[] trackList = new String[] {
        "D:\\test\\1.mp3",
        "D:\\test\\2.mp3",
        "D:\\test\\3.mp3",
        "D:\\test\\4.mp3",
        "D:\\test\\5.mp3",
        "D:\\test\\6.mp3",
        "D:\\test\\7.mp3",
        "D:\\test\\8.mp3",
        "D:\\test\\9.mp3",
    };

    int trackIndex = 0;

    private MediaPlayer mediaPlayer;
    private static final String NATIVE_LIBRARY_SEARCH_PATH = "stage\\lib\\vlc";

    public VLCJFinishedBug( ) {
        NativeLibrary.addSearchPath( RuntimeUtil.getLibVlcLibraryName(), NATIVE_LIBRARY_SEARCH_PATH );
        mediaPlayer = (new AudioMediaPlayerComponent().getMediaPlayer();

        mediaPlayer.addMediaPlayerEventListener(new MediaPlayerEventAdapter() {
            public void finished ( MediaPlayer player ) {
                next();
            }
        });
    }

    private void playTrack( String trackLocation ) {
        System.out.println ( "Playing track: " + trackLocation );
        mediaPlayer.playMedia( trackLocation );
    }

    private String nextTrackString() {
        trackIndex++;
        if ( trackIndex >= trackList.length ) {
            System.out.println( "Reach end of track list." );
            System.exit( 0 );
        }

        return ( trackList [ trackIndex ] );
    }

    public void start() {
        trackIndex = 0;
        playTrack ( trackList[ 0 ] );
    }

    public void next() {
        playTrack ( nextTrackString() );
    }

    public void goToNearEnd() {
        mediaPlayer.setPosition( .98f );
    }

    public static void main ( String[] args ) {
        VLCJFinishedBug player = new VLCJFinishedBug();

        JButton start = new JButton ( "Start" );
        start.addActionListener( e -> player.start() );

        JButton next = new JButton ( "Next" );
        next.addActionListener( e -> player.next() );

        JButton goToNearEnd = new JButton ( "Go To Near End" );
        goToNearEnd.addActionListener( e -> player.goToNearEnd() );

        JPanel content = new JPanel();
        content.add( start );
        content.add( next );
        content.add( goToNearEnd );

        JFrame frame = new JFrame( "VLC Play Test" );
        frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        frame.setContentPane( content );
        frame.pack();
        frame.setVisible( true );
    }
}

如何在当前曲目结束后开始播放新曲目？