Question

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

public class DateDemo {

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

        SimpleDateFormat datef = new SimpleDateFormat("dd/mm/yyyy");

        Date date1 = new Date(2010, 03, 03) ;
        Date date2 = datef.parse("03/03/2010") ;

        System.out.println( date1 );
        System.out.println( date2 );
    }
}

is giving following output:

Sun Apr 03 00:00:00 MST 3910

Sun Jan 03 00:03:00 MST 2010

Why it is giving different results?

Answer 1

new Date(2010, 03, 03):

This expects first parameter as year-1900, second as Month(starts with 0 as January) and the third parameter as day

The reason you are getting output as ‘Sun Apr 03 00:00:00 MST 3910’ => consutructor adds 1900 to the year passed as first parameter. Apr for 3rd Index.

The use of this constructor has been deprecated.

The reason for output ‘Sun Jan 03 00:03:00 MST 2010’: You are not using correct format,
if you use “dd/MM/yyyy” then you will get the correct output.

Hope this helps