Java - Date Arithmetic

// Copied from http://www.javaroots.com/2013/12/date-airthmetics-java.html

package com.test;

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


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

     SimpleDateFormat fmt = new SimpleDateFormat("MM/dd/yy");
     Date from = fmt.parse("01/10/12");
     Date to = fmt.parse("04/30/12");

     Calendar fromCal = Calendar.getInstance();
     fromCal.setTime(from);
     int fromYear = fromCal.get(Calendar.YEAR);
     Calendar toCal = Calendar.getInstance();
     toCal.setTime(to);
     int toYear = toCal.get(Calendar.YEAR);

     int diff = toYear - fromYear ;

     for(int i =0 ; i;ltdiff ; i++)
     {
      Calendar calendarEnd=Calendar.getInstance();
         calendarEnd.set(Calendar.YEAR,fromYear);
         calendarEnd.set(Calendar.MONTH,11);
         calendarEnd.set(Calendar.DAY_OF_MONTH,31);

         Date calendarEndDate =calendarEnd.getTime();

         System.out.println("From "+ fmt.format(from)+" To " +fmt.format(calendarEndDate));

         calendarEnd.add(Calendar.DATE,1);
         from = calendarEnd.getTime();
         fromYear++;
     }

      System.out.println("From "+ fmt.format(from)+" To " +fmt.format(to));

 }
}