Java Program to accept two dates and display the difference between them

The following code is to get the difference between the two valid dates in milliseconds, seconds, minutes, hours and days.
Code:-

import java.util.*;
public class DateDiff{
    Scanner scan=new Scanner(System.in);
    int year, month, date;
    public void input(){
        int year, month, date;
        try{
            System.out.println("Enter 1st Year in \"yyyy\" format: ");
            this.year=scan.nextInt();
            System.out.println("Enter 1st Month in \"mm\" format: ");
            this.month=scan.nextInt();
            System.out.println("Enter 1st Date in \"dd\" format: ");
            this.date=scan.nextInt();
            System.out.println("\n\nEnter 2nd Year in \"yyyy\" format: ");
            year=scan.nextInt();
            System.out.println("Enter 2nd Month in \"mm\" format: ");
            month=scan.nextInt();
            System.out.println("Enter 2nd Date in \"dd\" format: ");
            date=scan.nextInt();
            difference(year, month, date);
        }
        catch(NumberFormatException e){
            System.out.println("Error Code: "+e);
            System.exit(0);
        }
    }

    public void difference(int year, int month, int date){
        Calendar cal1=Calendar.getInstance();
        Calendar cal2=Calendar.getInstance();
        cal2.set(year, month, date);
        cal1.set(this.year, this.month, this.date);
        long mill1=cal1.getTimeInMillis();
        long mill2=cal2.getTimeInMillis();
        long diff=mill2-mill1;
        long sec=diff/1000;
        long min=diff/(60*1000);
        long hour=diff/(60*60*1000);
        long day=diff/(24*60*60*1000);
        System.out.println("\n\nDifference between \""+this.year+"/"+this.month+"/"+this.date+"\" and \""+year+"/"+month+"/"+date+"\" is:- ");
        System.out.println("Time in Milliseconds: "+diff+" millisecs.");
        System.out.println("Time in Seconds: "+sec+" secs.");
        System.out.println("Time in Minutes: "+min+" mins.");
        System.out.println("Time in Hours: "+hour+" hrs.");
        System.out.println("Time in Days: "+day+" days.");
    }

    public static void main(String[] args){
        DateDiff date=new DateDiff();
        date.input();
    }
}

Output:-
Enter 1st Year in "yyyy" format:
1997
Enter 1st Month in "mm" format:
12
Enter 1st Date in "dd" format:
08

Enter 2nd Year in "yyyy" format:
2013
Enter 2nd Month in "mm" format:
03
Enter 2nd Date in "dd" format:
28

Difference between "1997/12/8" and "2013/3/28" is:-
Time in Milliseconds: 482889600000 millisecs.
Time in Seconds: 482889600 secs.
Time in Minutes: 8048160 mins.
Time in Hours: 134136 hrs.
Time in Days: 5589 days.