skymilong

private static String[][] convertToMatrix(List<Tdata> dataList, String[] titleRow) throws IllegalArgumentException {
        if (dataList.isEmpty()) {
            throw new IllegalArgumentException("Data list cannot be empty.");
        }

        String[][] matrix = new String[dataList.size() + 1][titleRow.length];
        System.arraycopy(titleRow, 0, matrix[0], 0, titleRow.length);

        for (int i = 0; i < dataList.size(); i++) {
            Tdata data = dataList.get(i);