Date to String and String to Date Error Java [duplicate]

Question

I am changing my date to String and again from string to date but the date after converting from string to date is different than before .See the Code

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

import javax.swing.JOptionPane;

public class DateChange {

public static void main(String[] args) {

    SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/YYYY");
    Date date = new Date();
    String dateString = dateFormat.format(date);

    Date currentDate = null;
    try {

        currentDate = dateFormat.parse(dateString);

        System.out.println(date + " \n" + currentDate);

    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

}

Here if date object has value Mon Sep 04 12:51:33 IST 2017

Than currentDate has Sun Jan 01 00:00:00 IST 2017

I know something is wrong with the code and I am unable to figure it out.So please point it out for me.

Thanks

What version of Java is that? If Java 8 or more, consider using the new datetime API — fge
– fge, Commented Sep 4, 2017 at 7:26
FYI, you are using troublesome old date-time classes now supplanted by the java.time classes. — Basil Bourque
– Basil Bourque, Commented Sep 4, 2017 at 7:37
Related: SimpleDateFormat producing wrong date time when parsing “YYYY-MM-dd HH:mm” — Anonymous
– Anonymous, Commented Sep 4, 2017 at 7:59
As an aside, I recommend you scrap the long outdated classes SimpleDateFormat and Date. Lots of people have experienced lots of problems with them, your is just one in a seemingly neverending row. Today we have so much better in the modern Java date & time API. — Anonymous
– Anonymous, Commented Sep 4, 2017 at 9:29

Alberto S. · Accepted Answer · 2017-09-04 07:27:51Z

2

You're using a wrong format. By checking the documentation you can see that

d: day in month
M: month in year
Y: week year
y: year

So the correct format would be: "dd/MM/yyyy"

answered Sep 4, 2017 at 7:27

Alberto S.

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1 Comment

Ayush Goyal Over a year ago

Thanks. This silly mistake took my 3 hours.

Elliott Frisch · Accepted Answer · 2017-09-04 07:27:14Z

1

Your format String is incorrect. You've used YYYY, but you need yyyy. Like,

SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");

answered Sep 4, 2017 at 7:27

Elliott Frisch

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