calculate sum and median by importying csv file in java

Question

public class data {
    public static void main(String[] args) {       
        String fileName = "Book1.csv";// File name is book1.csv
        File file = new File(fileName); // read file
        try{
            Scanner inputStream = new Scanner(file);
            while (inputStream.hasNext()){  // ignore first line
                String data = inputStream.next();
                System.out.println(data);
            }
            inputStream.close();

        }catch (FileNotFoundException e) {
            e.printStackTrace();
        }}}
 

output

I want to calculate the sum of the values of followers. can you please help me