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  1. import java.time.*;
  2. import java.time.format.*;
  3. import java.time.temporal.*;
  4.  
  5. class Example
  6. {
  7. 	private static void showDateInfo(LocalDate ld) {
  8. 		int weekOfYear = ld.get(ChronoField.ALIGNED_WEEK_OF_YEAR);
  9. 		int dayOfWeek = ld.getDayOfWeek().getValue();
  10. 		System.out.println(ld.format(DateTimeFormatter.ISO_LOCAL_DATE) + " is week " + weekOfYear + ", day " + dayOfWeek);
  11. 	}
  12. 	public static void main (String[] args) throws java.lang.Exception
  13. 	{
  14. 	    LocalDate currentLocalDate = LocalDate.of(2019, 6, 30);
  15. 	    showDateInfo(currentLocalDate);
  16. 	    int dayOfWeek = currentLocalDate.getDayOfWeek().getValue();
  17. 	    int weekOfYear = currentLocalDate.get(ChronoField.ALIGNED_WEEK_OF_YEAR);
  18. 	    LocalDate resultLocalDate = currentLocalDate
  19.             .minusYears(1)
  20.             .with(ChronoField.ALIGNED_WEEK_OF_YEAR, weekOfYear)
  21.             .with(ChronoField.DAY_OF_WEEK, dayOfWeek);
  22. 	    showDateInfo(resultLocalDate);
  23. 	}
  24. }
Success #stdin #stdout 0.14s 2184192KB
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Standard input is empty
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2019-06-30 is week 26, day 7
2018-07-01 is week 26, day 7
https://ideone.com/Q3iCq3
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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