private void readTrailer() {
private void readTrailer() throws IOException {
    private void readTrailer() {        String line = readLine();        ArrayList trailer = new ArrayList();        while (!line.equals("")) {            String[] pair = line.split(": *",2);            if (pair.length == 2) {                trailer.add(pair);            }            line = readLine();        }        if (trailer.size()>0) {            _trailer = new String[trailer.size()][2];            for (int i=0; i<trailer.size(); i++) {                String[] pair = (String[]) trailer.get(i);                _trailer[i][0] = pair[0];                _trailer[i][1] = pair[1];            }        }    }