class DataTableUtils {

    public static boolean areComplementary(List<String> column1, List<String> column2) {
        if(column1.size() != column2.size()) {
            return false;
        }

        for(int i = 0; i < column1.size(); i++) {
            String v1 = column1.get(i);
            String v2 = column2.get(i);

            if(!v1.trim().isEmpty() && !v2.trim().isEmpty()) {
                return false;
            }
        }

        return true;
    }

    private  DataTableUtils();

}