/* Listing4903.java */

import javax.sound.midi.*;

public class Listing4903
{
  private static void playAlleMeineEntchen()
  throws Exception
  {
    //Partitur {{Tonhoehe, DauerInViertelNoten, AnzahlWdh},...}
    final int DATA[][] = {
      {60,  1, 1}, //C
      {62,  1, 1}, //D
      {64,  1, 1}, //E
      {65,  1, 1}, //F
      {67,  2, 2}, //G,G
      {69,  1, 4}, //A,A,A,A
      {67,  4, 1}, //G
      {69,  1, 4}, //A,A,A,A
      {67,  4, 1}, //G
      {65,  1, 4}, //F,F,F,F
      {64,  2, 2}, //E,E
      {62,  1, 4}, //D,D,D,D
      {60,  4, 1}  //C
    };
    //Sequence bauen
    final int PPQS = 16; 
    final int STAKKATO = 4;
    Sequence seq = new Sequence(Sequence.PPQ, PPQS);
    Track track = seq.createTrack();
    long currentTick = 0;
    ShortMessage msg;
    //Kanal 0 auf "EnsembleStrings" umschalten
    msg = new ShortMessage(); 
    msg.setMessage(ShortMessage.PROGRAM_CHANGE, 0, 48, 0);
    track.add(new MidiEvent(msg, currentTick));
    //Partiturdaten hinzufügen
    for (int i = 0; i < DATA.length; ++i) { 
      for (int j = 0; j < DATA[i][2]; ++j) { //Anzahl Wdh. je Note
        msg = new ShortMessage();
        msg.setMessage(ShortMessage.NOTE_ON, 0, DATA[i][0], 64);
        track.add(new MidiEvent(msg, currentTick));
        currentTick += PPQS * DATA[i][1] - STAKKATO;
        msg = new ShortMessage();
        msg.setMessage(ShortMessage.NOTE_OFF, 0, DATA[i][0], 0);
        track.add(new MidiEvent(msg, currentTick));
        currentTick += STAKKATO; 
      }
    }
    //Sequencer und Synthesizer initialisieren
    Sequencer sequencer = MidiSystem.getSequencer(); 
    Transmitter trans = sequencer.getTransmitter();
    Synthesizer synth = MidiSystem.getSynthesizer();
    Receiver rcvr = synth.getReceiver();
    //Beide öffnen und verbinden
    sequencer.open();
    synth.open();
    trans.setReceiver(rcvr);
    //Sequence abspielen
    sequencer.setSequence(seq);
    sequencer.setTempoInBPM(145);
    sequencer.start();
    while (true) {
      try {
        Thread.sleep(100);
      } catch (Exception e) {
        //nothing
      }
      if (!sequencer.isRunning()) {
        break;
      }
    }
    //Sequencer anhalten und Geräte schließen
    sequencer.stop();
    sequencer.close();
    synth.close();
  }

  public static void main(String[] args)
  {
    try {
      playAlleMeineEntchen();
    } catch (Exception e) {
      e.printStackTrace();
      System.exit(1);
    }
    System.exit(0);
  }
}