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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. import java.time.* ;
  8.  
  9. /* Name of the class has to be "Main" only if the class is public. */
  10. class Ideone
  11. {
  12. public static void main (String[] args) throws java.lang.Exception
  13. {
  14. long countFirstOfMonths =
  15. LocalDate
  16. .parse( "2022-03-14" )
  17. .datesUntil( LocalDate.parse( "2022-04-15" ) )
  18. .filter( localDate -> localDate.getDayOfMonth() == 1 )
  19. .count() ;
  20.  
  21. System.out.println( countFirstOfMonths );
  22. }
  23. }
Success #stdin #stdout 0.11s 49532KB
stdin
Standard input is empty
stdout
1