Get Last Day (Date) of Week for a given Date

Question

How to get the last week Day (saturday) Date for a particular Date. Means if I give Input as 06-04-2012

(MM-dd-YYYY)

The output should be 06-09-2012 as seen in this calendar.

possible duplicate of [Get first date of week from provided date](http://stackoverflow.com/questions/1036613/get-first-date-of-week-from-provided-date) — Thorbjørn Ravn Andersen, May 23 '12 at 06:00
@ThorbjørnRavnAndersen The Question you linked is for JavaScript, not Java. So, not a duplicate. — Basil Bourque, Feb 26 '17 at 07:46

score 7 · Answer 1 · answered May 23 '12 at 05:59

7

Calendar cal  = Calendar.getInstance();
int currentDay = cal.get(Calendar.DAY_OF_WEEK);
int leftDays= Calendar.SATURDAY - currentDay;
cal.add(Calendar.DATE, leftDays);

See

example

answered May 23 '12 at 05:59

jmj

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If current day is a Saturday, this will return it as is. – Vijay Dev Mar 18 '13 at 08:05
unfortunately this only works for sunday - sat cals...what about other locales when the week starts with monday? a universal solution? – jacoballenwood Feb 23 '18 at 18:44

score 4 · Answer 2 · edited May 23 '17 at 12:16

tl;dr

LocalDate.parse( 
    "06-04-2012" , 
    DateTimeFormatter.ofPattern( "MM-dd-uuuu" ) 
).with( TemporalAdjusters.nextOrSame( DayOfWeek.SATURDAY ) )
 .format( DateTimeFormatter.ofPattern( "MM-dd-uuuu" )  )

Using java.time

The modern way is with java.time classes.

First parse your input string as a LocalDate.

DateTimeFormatter f = DateTimeFormatter.ofPattern( "MM-dd-uuuu" );
LocalDate ld = LocalDate.parse( "06-04-2012" , f );

ld.toString(): 2012-06-04

Then get the next Saturday, or use the date itself if it is a Saturday. To specify a Saturday, use the enum DayOfWeek.SATURDAY. To find that next or same date that is a Saturday, use an implementation of TemporaAdjuster found in the TemporalAdjusters (note plural name) class.

LocalDate nextOrSameSaturday = 
    ld.with( TemporalAdjusters.nextOrSame( DayOfWeek.SATURDAY ) ) ;

To generate a String, I suggest calling toString to use standard ISO 8601 format.

String output = ld.toString();

2012-06-09

But if you insist, you may use the same formatter as used in parsing.

String output = ld.format( f );

06-09-2012

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

Where to obtain the java.time classes?

Java SE 8 and SE 9 and later
- Built-in.
- Part of the standard Java API with a bundled implementation.
- Java 9 adds some minor features and fixes.
Java SE 6 and SE 7
- Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
Android
- The ThreeTenABP project adapts ThreeTen-Backport (mentioned above) for Android specifically.
- See How to use ThreeTenABP….

The ThreeTen-Extra project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as Interval, YearWeek, YearQuarter, and more.

score 0 · Answer 3 · answered May 23 '12 at 05:59

0

Look at either JODA time or (if you cannot add new libraries) the Calendar class.

answered May 23 '12 at 05:59

Thorbjørn Ravn Andersen

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score 0 · Answer 4 · answered Jun 06 '13 at 18:52

public Calendar lastDayOfWeek(Calendar calendar){  
     Calendar cal = (Calendar) calendar.clone();  
     int day = cal.get(Calendar.DAY_OF_YEAR);  
     while(cal.get(Calendar.DAY_OF_WEEK) != Calendar.SATURDAY){  
          cal.set(Calendar.DAY_OF_YEAR, ++day);  
     }  
     return cal;  
}

Get Last Day (Date) of Week for a given Date

4 Answers4

tl;dr

Using java.time

About java.time