write(buffer, 0, len); write(pad,0,((4 - len) & 3)); }
write(buffer, len, (4 - len) & 3); }
    public void writeString(String s) throws IOException {        byte[] buffer = s.getBytes();		  int len = buffer.length;        writeInt(len);        if (len > 0) {            write(buffer, 0, len);            write(pad,0,((4 - len) & 3));        }		    }