for (int i = 0; i < source.size(); i++) { sb.append(source.elementAt(i).toString());
for (int i = 0; i < _source.size(); i++) { sb.append(_source.elementAt(i).toString());
    public String toString() {        StringBuffer sb = new StringBuffer();        String lineSeparator = System.getProperty("line.separator");        for (int i = 0; i < source.size(); i++) {            sb.append(source.elementAt(i).toString());            sb.append(lineSeparator);        }        return sb.toString();    } //-- toString