MidiSystem.getSequencer (locks up)

[Mace Challinor]

Can anyone explain to me why my java freezes when I use the MidiSystem.getSequencer in the javax.sound.midi API? (until I press Ctl+C)
The Midi sound works fine, the program works fine, but the Public class MiniMiniMusicApp will not complete.
>Yes , I'm working through the Head First book.
test code:
__________________________________________________________

import javax.sound.midi.*;
public class MiniMiniMusicApp {

public static void main(String[] args){
MiniMiniMusicApp mini = new MiniMiniMusicApp();
mini.play();
System.out.println("Competed Main");
}
public void play() {

try {
Sequencer player = MidiSystem.getSequencer();
player.open();

Sequence seq = new Sequence(Sequence.PPQ, 4);

Track track = seq.createTrack();
ShortMessage a = new ShortMessage();
a.setMessage(144,1,44,100);
MidiEvent noteOn = new MidiEvent(a,1);
track.add(noteOn);
ShortMessage b = new ShortMessage();
b.setMessage(128,1,44,100);
MidiEvent noteOff = new MidiEvent(b,16);
track.add(noteOff);
player.setSequence(seq);
player.start();
} catch (Exception ex) {
ex.printStackTrace();
}
System.out.println("Competed Play");
}
}

[Jason Menard]

I'm going to move this to Other Java APIs. Please post any follow-ups there.

[Mace Challinor]

No problems now,, I have been using the Midi API in conjunction with a JFrame and the command "setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)" will gracefully close the program without the Midi hanging..
This topic can now be closed. Thanks.