Wrong number of bytes in MidiMessage?

Question

Hi, I'm implementing a MIDI trace panel. My class implements the Receiver interface, gets the transmitter from a selected MidiDevice and sets the receiver to an object of my class. The send() method is:-
    public void send(javax.sound.midi.MidiMessage midiMessage, long param) {
        byte[] msg_bytes = midiMessage.getMessage();
        String s = toHexString(msg_bytes);
        // add at end of list
        m_list_model.addElement(s);
        // restrict list to last 100 entries
        if (m_list_model.size() > 100)
            m_list_model.remove(0);
        int size = m_list_model.getSize();
        m_trace_list.ensureIndexIsVisible(size - 1);
    }I can breakpoint at this code so the Receiver is working but when I inspect the MidiMessage for a Note ON event from a MIDI keyboard I see 2 bytes instead of 3. I see the status byte and the key number but the velocity is missing. I've tried this with two different MIDI interfaces with the same results. One interface has a low level trace that confirms the message has 3 bytes. Obviously I'm missing something. Anyone any ideas?

Answer 1

Steve,
Your post is really old... but I've just run across it and am having the exact same problem. It seems for some reason that since JDK 1.4 came out... only 2 bytes are being reported instead of 3. I have similar code that worked fine on version 1.3, but no longer works on 1.4
If you have figured this out, PLEASE let me know how to fix it as it's really a pain for me having to fix code that worked fine on another version.
Thanks,
Mark