Question

I am reading a csv file line by line and I am trying to compare previous, current and next lines. I know I need to save three string variables as I am reading a line. But I am stuck as to how to save my three variables so that when I read line 4 to be able to print line 3 and line 5.

Answer 1

String prev = null;
String curr = null;
String next = null;

Scanner sc = new Scanner(new File("thefile.csv"));

while(sc.hasNextLine()) {
    prev = curr;
    curr = next;
    next = sc.nextLine();

    // now process those lines

}