public void write(long time, Instrument instrument1, Instrument instrument2) { double bid1 = instrument1.getBid(); double ask1 = instrument1.getAsk(); double bid2 = instrument2.getBid(); double ask2 = instrument2.getAsk(); if (bid1 > 0 && ask1 > 0 && bid2 > 0 && ask2 > 0) { StringBuilder sb = new StringBuilder(); sb.append(dateFormat.format(new Date(time))).append(","); sb.append(decimalFormat.format(bid1)).append(","); sb.append(decimalFormat.format(ask1)).append(","); sb.append(decimalFormat.format(bid2)).append(","); sb.append(decimalFormat.format(ask2)); writer.println(sb); writer.flush(); } }