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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. ZoneId z = ZoneId.of( "Asia/Tehran" ) ;
  15. LocalDate ld = LocalDate.of( 2022 , Month.MARCH, 22 ) ;
  16. ZonedDateTime zdt = ld.atStartOfDay( z ) ;
  17.  
  18. Instant instant = zdt.toInstant() ; // Adjust from time zone to UTC by extracting an `Instant`.
  19. long millis = instant.toEpochMilli() ;
  20.  
  21. System.out.println( zdt ) ;
  22. System.out.println( millis ) ;
  23.  
  24.  
  25.  
  26. }
  27. }
Success #stdin #stdout 0.12s 55500KB
stdin
Standard input is empty
stdout
2022-03-22T01:00+04:30[Asia/Tehran]
1647894600000