CODEWITHSUNDEEP
javadatejodatimedayofweek
LuxuryMode
LuxuryMode

Reputation: 33741

Get DateTime dayOfWeek/dayOfMonth as String

How can I get the day of week or month as a String? Without having to do something like:

DateTime now = DateTime.now();
String dayOfWeek = null;
switch(now.getDayOfWeek()) {
    case DateTimeConstants.MONDAY:
        dayOfWeek = "Monday";
        break;
    case DateTimeConstants.TUESDAY:
        dayOfWeek = "Tuesday";
        break;
    case DateTimeConstants.WEDNESDAY:
        dayOfWeek = "Wednesday";
        break;
    case DateTimeConstants.THURSDAY:
        dayOfWeek = "Thursday";
        break;
    case DateTimeConstants.FRIDAY:
        dayOfWeek = "Friday";
        break;
    case DateTimeConstants.SATURDAY:
        dayOfWeek = "Saturday";
        break;
    case DateTimeConstants.SUNDAY:
        dayOfWeek = "Sunday";
        break;
}

Upvotes: 5

Views: 7729

Answers (3)

Arvind Kumar Avinash
Arvind Kumar Avinash

Reputation: 79085

java.time

Shown below is a notice on the Joda-Time Home Page:

Note that from Java SE 8 onwards, users are asked to migrate to java.time (JSR-310) - a core part of the JDK which replaces this project.

Your question:

How can I get the day of week or month as a String?

Solution using java.time API

  1. Get the current date-time using ZonedDateTime#now.
  2. Use ZonedDateTime#getDayOfWeek-- and ZonedDateTime#getMonth to get the day of the week and month enum constants respectively from the ZonedDateTime instance.
  3. Use the getDisplayName(TextStyle, Locale) function of these enums to get the String in the desired locale.

Demo:

class Main {
    public static void main(String[] args) {
        // ZoneId.systemDefault() returns the system default time zone
        // Change it to the desired time zone e.g. ZoneId.of("Europe/Paris")
        ZoneId zoneId = ZoneId.systemDefault();
        ZonedDateTime zdt = ZonedDateTime.now(zoneId);

        DayOfWeek dayOfWeek = zdt.getDayOfWeek();
        System.out.println("Day of week: " + dayOfWeek);
        System.out.println(dayOfWeek.getDisplayName(
                TextStyle.FULL, Locale.ENGLISH));
        System.out.println(dayOfWeek.getDisplayName(
                TextStyle.FULL, Locale.forLanguageTag("hi"))); // Hindi
        System.out.println(dayOfWeek.getDisplayName(
                TextStyle.FULL, Locale.forLanguageTag("fr")));// French

        Month month = zdt.getMonth();
        System.out.println("Month: " + month);
        System.out.println(month.getDisplayName(
                TextStyle.FULL, Locale.ENGLISH));
        System.out.println(month.getDisplayName(
                TextStyle.FULL, Locale.forLanguageTag("hi"))); // Hindi
        System.out.println(month.getDisplayName(
                TextStyle.FULL, Locale.forLanguageTag("fr"))); // French
    }
}

Output:

Day of week: THURSDAY
Thursday
गुरुवार
jeudi
Month: JANUARY
January
जनवरी
janvier

Try it on Ideone

Learn more about the modern Date-Time API from Trail: Date Time.

Upvotes: 2

LuxuryMode
LuxuryMode

Reputation: 33741

Well, apparently it's just dateTime.dayOfWeek().getAsText(); as documented here.

Upvotes: 13

Deepak Sharma
Deepak Sharma

Reputation: 973

You can create DateTime extension method with the above logic and use wherever required without repeating the whole logic.

Upvotes: 0

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