Method serialize

src/main/java/Client/Msg.java:135–140

(DataOutputStream os)

    public boolean isPresence() { return messageType==MESSAGE_TYPE_PRESENCE; }
    
    public void serialize(DataOutputStream os) throws IOException {
	os.writeUTF(from);
	os.writeUTF(body);
	os.writeLong(dateGmt);
	if (subject!=null) os.writeUTF(subject);
    }
    
    public Msg (DataInputStream is) throws IOException {
	from=is.readUTF();