Assigning Strings to a Date List

Question

I need to assign for each day a list of dates of an interval period, a given String among three possible (Class A, Class B, Class C), so that the result is sequential until filling all the dates of the list.

Follow code done so far....

import java.util.*;
import java.text.*;

public class CalcularDatas {

    public static void main (String[] args) throws ParseException {

        String[] myArray = {"Turma A", "Turma B", "Turma C"};
        List<String> arrayList = new ArrayList<String> (Arrays.asList(myArray));

        DateFormat df = new SimpleDateFormat ("dd/MM/yyyy");
        Date dt1 = df.parse ("01/10/2016"); // Data inicial
        Date dt2 = df.parse ("10/10/2016"); // 
        Calendar cal1 = Calendar.getInstance();
        cal1.setTime (dt1);
        Calendar cal2 = Calendar.getInstance();
        cal2.setTime (dt2);
        cal2.add(Calendar.DATE,1);
        for (Calendar cal = cal1; cal.compareTo (cal2) <= 0; cal.add (Calendar.DATE, 1)) {
            System.out.println (df.format (cal.getTime())+ arrayList);
        }
    }
}

Exit:

01/10/2016[Class A, Class B, Class C]
02/10/2016[Class A, Class B, Class C]
03/10/2016[Class A, Class B, Class C]
04/10/2016[Class A, Class B, Class C]
05/10/2016[Class A, Class B, Class C]
06/10/2016[Class A, Class B, Class C]
07/10/2016[Class A, Class B, Class C]
08/10/2016[Class A, Class B, Class C]
09/10/2016[Class A, Class B, Class C]
10/10/2016[Class A, Class B, Class C]
11/10/2016[Class A, Class B, Class C]

Expected mode:

01/10/2016 Class A
02/10/2016 Class B
03/10/2016 Class C
04/10/2016 Class A
05/10/2016 Class B
06/10/2016 Class C
07/10/2016 Class A
08/10/2016 Class B
09/10/2016 Class C
10/10/2016 Class A
11/10/2016 Class B

Answer 1

If you order print arrayList, obviously it will print it whole. The solution is to use an iterator, increment it modularly and print only the position of that index:

int i = 0;
for (Calendar cal = cal1; cal.compareTo(cal2) <= 0; cal.add(Calendar.DATE, 1)) {
    System.out.println(df.format(cal.getTime()) + " " + arrayList.get(i));
    i = (i + 1) % 3;
}

Answer 2

One of the possible solutions is to use Iterator under his ArrayList:

public static void main (String[] args) {
    String[] myArray = {"Turma A", "Turma B", "Turma C"};
    List<String> arrayList = new ArrayList<String> (Arrays.asList(myArray));

    DateFormat df = new SimpleDateFormat ("dd/MM/yyyy");
    Date dt1 = df.parse ("01/10/2016"); // Data inicial
    Date dt2 = df.parse ("10/10/2016"); // 
    Calendar cal1 = Calendar.getInstance();
    cal1.setTime (dt1);
    Calendar cal2 = Calendar.getInstance();
    cal2.setTime (dt2);
    cal2.add(Calendar.DATE,1);
    //cria o iterator sob o arraylist
    Iterator<String> it = arrayList.iterator();

    for (Calendar cal = cal1; cal.compareTo (cal2) <= 0; cal.add (Calendar.DATE, 1)) {
        //checa se o iterator já chegou ao fimm
        //se sim, o reinicia
        if(!it.hasNext()){
            it = arrayList.iterator();      
        }
        // next() exibe o item seguinte do arraylist
        System.out.println (df.format (cal.getTime()) + it.next());
    }
}

Upshot:

01/10/2016 Class A
02/10/2016 Class B
03/10/2016 Class C
04/10/2016 Class A
05/10/2016 Class B
06/10/2016 Class C
07/10/2016 Class A
08/10/2016 Class B
09/10/2016 Class C
10/10/2016 Class A
11/10/2016 Class B

See working on IDEONE