java学习笔记_MIDI

 import javax.sound.midi.*;

 public class Midi {
     public void play(int instrument, int note) {
         try {
             Sequencer player = MidiSystem.getSequencer();
             player.open();

             Sequence seq = new Sequence(Sequence.PPQ, 4);//divisionType, resolution

             Track track = seq.createTrack();

             ShortMessage first = new ShortMessage();
             first.setMessage(192, 1, instrument, 0);
             MidiEvent change = new MidiEvent(first, 1);
             track.add(change);

             ShortMessage a = new ShortMessage();
             a.setMessage(144, 1, note, 100);//command channel data1 data2
                                            //144 -note on 128 -note off
                                            //1 - 频道
                                            //44 - 音符 0-127
                                            //100 - 音道
             MidiEvent noteOn = new MidiEvent(a, 1); //tick - the time-stamp for the event, in MIDI ticks
             track.add(noteOn);

             ShortMessage b = new ShortMessage();
             b.setMessage(128, 1, note, 100);//command channel data1 data2
             MidiEvent noteOff = new MidiEvent(b, 16); //tick - the time-stamp for the event, in MIDI ticks
             track.add(noteOff);

             player.setSequence(seq);
             player.start();
             //while( player.isRunning() ) {
             //    try {
             //        Thread.sleep(1000);
             //    } catch (Exception e) {}
             //}
             //player.close();

         } catch( Exception ex) {
             ex.printStackTrace();
         }
     }

     public static void main(String[] args) {
         if (args.length < 2) {
             System.out.println("Don't forget the instrument and note args");
         }
         else {
             int instrument = Integer.parseInt(args[0]);
             int note = Integer.parseInt(args[1]);
             Midi midi = new Midi();
             midi.play(instrument, note);
         }
     }
 }