[java]尋找老歌，播放m3u列表中的每個midi的開頭部分

最近想找個midi做鈴聲，以前存了上千個midi, 一時間很難找到。
mediaplayer不支援每曲抽樣開頭部分，只好自己動手了。

先在資源管理員搜尋到所有midi, 然後拖mediaplayer，儲存播放清單為m3u，
然後用下面這段程式播放m3u列表了。

利用了java內建的midi播放api. 參考了灰色魔女的midi播放程式

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;

import javax.sound.midi.MidiSystem;
import javax.sound.midi.Sequencer;

public class MidiPlay {
    public MidiPlay(final File m3u, final int line) throws Exception {
        final Sequencer player = MidiSystem.getSequencer();
        player.open();
        final LineNumberReader list = new LineNumberReader(
                new InputStreamReader(new FileInputStream(m3u), "UTF-8"));
        //list.setLineNumber(line);
        for(int i=0;i<line;i++)
            list.readLine();
        new Thread() {
            public void run() {
                try {
                    int current = line;
                    String file = list.readLine();
                    while (file != null) {
                        try {
                            file = file.trim();
                            if (!(file.startsWith("#") || file.length() == 0)) {
                                File f = new File(file);
                                if (f.exists()) {
                                    player.stop();
                                    Thread.sleep(500);
                                    player.setSequence(MidiSystem
                                            .getSequence(f));
                                    player.start();
                                    System.out.println(current + ": "
                                            + f.getCanonicalPath());
                                    Thread.sleep(5000);
                                }
                            }
                        } catch (Exception ex) {
                            ex.printStackTrace();
                        }
                        file = list.readLine();
                        current++;
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
                player.close();
            }
        }.start();
    }

    public static void main(String[] args) throws Exception {
        new MidiPlay(new File("e:/all-midi.m3u"),170);
    }

}