// Here is some code you may wish to use.  You’ll have to look at it and figure
// out the details.  If you do, you’ll probably also want to use the
// file "tetris.midi" (hint, hint…).

import java.net.*;
import java.io.*;
import java.applet.*;
import javax.sound.midi.*;
import javax.sound.sampled.*;

class TetrisMidi {
  public static void main(String[] args) throws Exception {
    new TetrisMidi().doPlayMidi("tetris.midi", true);
  }

  ///////////////////
  // For: midi files
  ///////////////////

  private Sequencer sequencer = null;

  private void doPlayMidi(String path, boolean loop) throws Exception {
    doPlayMidi(new FileInputStream(new File(path)), loop);
  }

  private void doPlayMidi(InputStream is, boolean loop) {
    try {
      doStopMidiSounds();
      sequencer = MidiSystem.getSequencer();
      sequencer.setSequence(MidiSystem.getSequence(is));
      if (loop)
        sequencer.setLoopCount(Sequencer.LOOP_CONTINUOUSLY);
      sequencer.open();
      sequencer.start();
    } catch (Exception e) { midiError("" + e); }
  }

  private void midiError(String msg) {
      System.err.println("Midi error: " + msg);
      sequencer = null;
  }

  private void doStopMidiSounds() {
    try {
      if ((sequencer == null) || (!sequencer.isRunning())) return;
      sequencer.stop();
      sequencer.close();
    }
    catch (Exception e) { midiError("" + e); }
    sequencer = null;
  }
}