Dealing with commas when reading a CSV file

Question

There is nothing wrong in the other part. I read the lines of the excel files. But I want to split the cells of this excel. I use the statement String []values1 = data1.split(","); and values1[5]=values1[5].replace('"', ' ').trim(); . But there is a particular cell which there is a , in it. This comma disrupts the arranged order. How should I deal with it?

File DopCan = new File(filesnames[0]);

try
{
    Scanner scanner = new Scanner(DopCan);
    scanner.nextLine();
    scanner.nextLine();

    while(scanner.hasNext())
    {

        String data = scanner.nextLine();
        String []values = data.split(",");
        values[5]=values[5].replace('"', ' ').trim();
        if(Integer.parseInt(values[5])==0)
        {
            i++;
        }
        else
        {
            break;
        }
    }

    scanner.close();

    Scanner scanner1 = new Scanner(DopCan);
    scanner1.nextLine();
    scanner1.nextLine();
    while(scanner.hasNext())
    {
        ArrayList <PollingPlace> files = new ArrayList();
        while (scanner1.hasNext())
        {
            int n=0;
            String data1 = scanner1.nextLine();
            String []values1 = data1.split(","); //Problem here
            scanner1.nextLine();
            String data3=scanner1.nextLine();
            String []values3 = data3.split(",");
            values1[5]=values1[5].replace('"', ' ').trim();
            values1[7]=values1[7].replace('"', ' ').trim();
            values1[14]=values1[14].replace('"', ' ').trim();
            values3[14]=values3[14].replace('"', ' ').trim();
            files.add(new PollingPlace(Integer.parseInt(values1[5]),Integer.parseInt(values1[7]),Integer.parseInt(values1[14]),Integer.parseInt(values3[14])));

            scanner1.nextLine();
            scanner1.close();
        }
    }
    catch (Exception e) {
        e.printStackTrace();
    }
}

Answer 1

There's an easy answer and a correct one.

Easy answer is to parse the string more robust with regexp, say,

(?:\s*(?:\"([^\"]*)\"|([^,]+))\s*,?)+?

But CSV turns out to be a rather diffucult for that as there are a number of corner cases to consider.

Correct answer is to use a library for that, and as it happens there is manifold of them: JSefa , OpenCSV , etc.