How to calculate difference between two date String in Java

Parsing Date

public Date parse(String source) throws ParseException

Parses text from the beginning of the given string to produce a date. The method may not use the entire text of the given string.
See the parse(String, ParsePosition) method for more information on date parsing.
Parameters:
source - A String whose beginning should be parsed.
Returns:
A Date parsed from the string.
Throws: ParseException - if the beginning of the specified string cannot be parsed.

   package com.javasunderesan;

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

public class CompareDateTime {

 public static void main(String[] args) {
  SimpleDateFormat sdf = new SimpleDateFormat("dd/mm/yyyy");  
  
  Date start = null, end = null;
  String fromDate = null;
  String toDate = null;
  try {
   CompareDateTime compareDate = new CompareDateTime();
   fromDate = "24/05/2016";
   toDate = "25/05/2016";
   start = sdf.parse(fromDate);
   end = sdf.parse(toDate);   
   System.out.println("Days Between " + start + " and " + end + ":::" +compareDate.daysBetween(start, end));
  } catch (ParseException e) {
    e.printStackTrace();
  }

 }

 private Long daysBetween(Date d1, Date d2) {
  return (Long) ((d2.getTime() - d1.getTime()) / (1000 * 60 * 60 * 24));
 }
}

output: Days Between Sun Jan 24 00:05:00 IST 2016 and Mon Jan 25 00:05:00 IST 2016:::1