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dategwtdatetime
Mike
Mike

Reputation: 1336

GWT DateTimeFormat returns the wrong date

I have the following code

        String test = "21/04/2013";
        fmt = DateTimeFormat.getFormat("MM/dd/yyyy");
        Date dateTest = fmt.parse(test);
        Window.alert(fmt.format(dateTest));

And the alert box shows the date

  09/04/2014

instead of

  21/04/2013

Why?

Upvotes: 1

Views: 1315

Answers (3)

Thomas Broyer
Thomas Broyer

Reputation: 64541

As others already say, it's because of your pattern. What they don't say is why it behaves that way.

When parsing 21/04/2013 as MM/dd/yyyy, DateTimeFormat will decompose the date as:

Month  Day of month  Year
  21        4        2013

and it'll then adjust things to make a valid date. To do that, the Month part is truncated at 12 (so that temporary date is Dec 4th, 2013) and the remainder (21 - 12 = 9) is then added, leading to Sept. 4th 2014, which according to your format displays as 09/04/2014.

Upvotes: 5

Gab
Gab

Reputation: 8323

You're reversing day and month.

String test = "21/04/2013";
fmt = DateTimeFormat.getFormat("dd/MM/yyyy");
Date dateTest = fmt.parse(test);
Window.alert(fmt.format(dateTest));

Upvotes: 2

Hassen Ch.
Hassen Ch.

Reputation: 1751

You wanted to show 21/04/2013 but the format was MM/dd/yyyy. It should be dd/MM/yyyy

So change it like this:

String test = "21/04/2013";
fmt = DateTimeFormat.getFormat("dd/MM/yyyy");
Date dateTest = fmt.parse(test);
Window.alert(fmt.format(dateTest));

Upvotes: 2

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