Hi friend,

Code to solve the Problem :

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

public class DayDiff {

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

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

//string containing date in one format

System.out.println("Enter Start Date in Format DD/MM/yyyy");
String strDate2 =br.readLine();
System.out.println("Enter End Date in Format DD/MM/yyyy");
String strDate1 = br.readLine();


try
{
//create SimpleDateFormat object with source string date format
SimpleDateFormat sdfSource = new SimpleDateFormat("DD/MM/yyyy");

//parse the string into Date object
Date date1 = sdfSource.parse(strDate1);
Date date2 = sdfSource.parse(strDate2);


long diff = date1.getTime() - date2.getTime();

long diffDays = diff / (24 * 60 * 60 * 1000);

System.out.println("diffDays : " + diffDays);

}
catch(ParseException pe)
{
System.out.println("Parse Exception : " + pe);
}
}
}



Thanks