Main.java

    static void ReadFile(String filePath) {
        ArrayList<String> messageTypeList = new ArrayList<>();
        ArrayList<String> transactionTypeList = new ArrayList<>();
        ArrayList<String> responseCodeList = new ArrayList<>();
        ArrayList<String> systemTraceList = new ArrayList<>();

        try (BufferedReader oBufferedReader = new BufferedReader(new FileReader(filePath))) {
            String strLine;
            oBufferedReader.readLine(); // skips the first line
            //
            while ((strLine = oBufferedReader.readLine()) != null) {
                String[] array = strLine.split(","); // split the line by comma

                for (int i = 0; i < array.length; i++) { // loops through the resulting array from split operation
                    switch (i) {
                        case 0:
                            messageTypeList.add(array[i]);
                            break;

                        case 1:
                            transactionTypeList.add(array[i]);
                            break;
                        case 2:
                            responseCodeList.add(array[i]);
                            break;

                        case 3:
                            systemTraceList.add(array[i]);
                            break;

                        // and so on and so forth


                        default:
                            break;
                    }
                }
            }

            System.out.println("Message Types: " + messageTypeList);
            System.out.println("Transaction Types: " + transactionTypeList);
            System.out.println("Response Codes: " + responseCodeList);
            System.out.println("System Trace: " + systemTraceList);

        } catch (IOException e) {
            System.err.format("IOException %s%n", e);
        }

    }