CODEWITHSUNDEEP
javadateformat
corneria
corneria

Reputation: 618

Convert Format in array of type Date to different Date format?

I have the following:

String[] string_dates = new String[10]
// read in strings formatted via fmt1 dd-MMM-yy)

Date[] date_dates = new Date[10];
for (int i = 0; i < 9; i++){
    date_dates[i] = fmt1.parse(string_dates[i]);

What would be the most efficient way to format the Dates in date_dates[] to format dd-MM-yyyy? Should I convert the Strings in strings_dates[] to format dd-MM-yyyy first, and then read them into dates? Thank you.

Upvotes: 1

Views: 4842

Answers (2)

MadProgrammer
MadProgrammer

Reputation: 347184

A Date is the representation of the number of milliseconds since the Unix epoch. It has no concept of a format of it's own (other then that created by toString, which should not worry about)...

Once you have converted the String representation of the date to a Date, you should then use an appropriate formatter to format that date in what ever format you want...

String[] stringDates = {
    "01-MAR-2013",
    "02-MAR-2013",
    "03-MAR-2013",
    "04-MAR-2013",
    "05-MAR-2013",
    "06-MAR-2013",
    "07-MAR-2013",
    "08-MAR-2013",
    "09-MAR-2013",
    "10-MAR-2013"};

SimpleDateFormat inFormat = new SimpleDateFormat("dd-MMM-yyyy");
Date[] dates = new Date[stringDates.length];
for (int i = 0; i < stringDates.length; i++) {
    try {
        dates[i] = inFormat.parse(stringDates[i]);
    } catch (ParseException ex) {
        ex.printStackTrace();
    }
}

SimpleDateFormat outFormat = new SimpleDateFormat("dd-MM-yyyy");
for (Date date : dates) {
    System.out.println("[" + date + "] - [" + outFormat.format(date) + "]");
}

Which produces...

[Fri Mar 01 00:00:00 EST 2013] - [01-03-2013]
[Sat Mar 02 00:00:00 EST 2013] - [02-03-2013]
[Sun Mar 03 00:00:00 EST 2013] - [03-03-2013]
[Mon Mar 04 00:00:00 EST 2013] - [04-03-2013]
[Tue Mar 05 00:00:00 EST 2013] - [05-03-2013]
[Wed Mar 06 00:00:00 EST 2013] - [06-03-2013]
[Thu Mar 07 00:00:00 EST 2013] - [07-03-2013]
[Fri Mar 08 00:00:00 EST 2013] - [08-03-2013]
[Sat Mar 09 00:00:00 EST 2013] - [09-03-2013]
[Sun Mar 10 00:00:00 EST 2013] - [10-03-2013]

You should avoid the temptation to save the formatted Date and instead simply keep the Date object and format it as you need.

Upvotes: 2

Malintha
Malintha

Reputation: 4766

you can format the string in to date type using following SimpledateFormat in java. Following is the example

    SimpleDateFormat formatter = new SimpleDateFormat("dd-MMM-yyyy");
String dateInString = "7-Jun-2013";

  try {

    Date date = formatter.parse(dateInString);
    System.out.println(date);
    System.out.println(formatter.format(date));

} catch (ParseException e) {
    e.printStackTrace();
}

Note For complete date and time patterns, please refer to this java.text.SimpleDateFormat JavaDoc.

Well in you case please take a look at these resourcesclick here

You can give "dd-MM-yyy". Please try it

Upvotes: 2

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