CsvListWriter writer = new CsvListWriter(new FileWriter("output.csv"), CsvPreference.STANDARD_PREFERENCE); List<List<String>> data = new ArrayList<>(); writer.write(data); writer.close(); CsvPreference csvPreference = new CsvPreference.Builder('"', ',', " ") .useQuoteMode(QuoteMode.MINIMAL) .build(); ICsvBeanReader beanReader = new CsvBeanReader(new FileReader("input.csv"), csvPreference); Stream<String> lines = Files.lines(Paths.get("input.csv")); lines.parallel().forEach(line -> { }); lines.close();