java midi

  void runMidi() throws MidiUnavailableException, InvalidMidiDataException, InterruptedException{
		MidiDevice.Info[] mdi = MidiSystem.getMidiDeviceInfo();	
		MidiDevice out = null;
		for(MidiDevice.Info info : mdi){
			System.out.println(info);
			if("Microsoft GS Wavetable Synth".equals(info.getName())){
				out = MidiSystem.getMidiDevice(info);
			}
		}
		
		if(null == out) return;
		
		out.open();
		
		Receiver rcv = out.getReceiver();
		ShortMessage message = new ShortMessage();
		int rnd = 0;
		for(;;){
			rnd = (int)(Math.random()*12);
			message.setMessage(ShortMessage.NOTE_ON, 0x9, 0x24+rnd, 0x7f);
			//rcv.send(message, -1);
			
			message.setMessage(ShortMessage.NOTE_ON, 0x0, 0x24+rnd, 0x7f);
			rcv.send(message, -1);	
			
			Thread.sleep(100);
			
			message.setMessage(ShortMessage.NOTE_OFF, 0x0, 0x24+rnd, 0x7f);
			rcv.send(message, -1);				
		}
	}