Hi,

This is the example code which can be used:

package test.app;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;

public class YearMonthBetweenDates {
    public static void main(String[] args) {
        String date1 = "JAN-2017";
        String date2 = "APR-2019";

        DateFormat formater = new SimpleDateFormat("MMM-yyyy");

        Calendar beginCalendar = Calendar.getInstance();
        Calendar finishCalendar = Calendar.getInstance();

        try {
            beginCalendar.setTime(formater.parse(date1));
            finishCalendar.setTime(formater.parse(date2));
        } catch (ParseException e) {
            e.printStackTrace();
        }

        DateFormat formaterYd = new SimpleDateFormat("yyyy-MM");

        while (beginCalendar.before(finishCalendar)) {

            String date =     formaterYd.format(beginCalendar.getTime()).toUpperCase();
            System.out.println(date);
            // Add One Month to get next Month
            beginCalendar.add(Calendar.MONTH, 1);
        }
    }
}

Thanks