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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.  
  15.     Map < LocalDate, Set < ZonedDateTime > > map = new HashMap <>( );
  16.     Set < ZonedDateTime > set = null;
  17.  
  18.     ZoneId z = ZoneId.of( "Africa/Tunis" );
  19.     LocalDate today = LocalDate.now( z );
  20.     ZonedDateTime todayStart = today.atStartOfDay( z );  // Determine the first moment of the day in a particular time zone.
  21.     map.putIfAbsent( todayStart.toLocalDate( ) , new HashSet <>( ) );
  22.     set = map.get( todayStart.toLocalDate( )  ) ;
  23.     set.add( todayStart );
  24.  
  25.     ZonedDateTime zdt1 = todayStart.plusHours( 6 );
  26.     map.putIfAbsent( zdt1.toLocalDate( ) , new HashSet <>( ) );
  27.     set = map.get( zdt1.toLocalDate( )  ) ;
  28.     set.add( zdt1 );
  29.  
  30.     ZonedDateTime zdt2 = todayStart.plusDays( 2 );
  31.     map.putIfAbsent( zdt2.toLocalDate( ) , new HashSet <>( ) );
  32.     set = map.get( zdt2.toLocalDate( )  ) ;
  33.     set.add( zdt2 );
  34.  
  35.     ZonedDateTime zdt3 = todayStart.plusMonths( 4 );
  36.     map.putIfAbsent( zdt3.toLocalDate( ) , new HashSet <>( ) );
  37.     set = map.get( zdt3.toLocalDate( )  ) ;
  38.     set.add( zdt3 );
  39.  
  40.     System.out.println( "map.toString(): " + map );
  41.  
  42.  
  43. 	}
  44. }
Success #stdin #stdout 0.23s 34432KB
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stdout
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map.toString(): {2018-01-25=[2018-01-25T00:00+01:00[Africa/Tunis]], 2018-01-23=[2018-01-23T00:00+01:00[Africa/Tunis], 2018-01-23T06:00+01:00[Africa/Tunis]], 2018-05-23=[2018-05-23T00:00+01:00[Africa/Tunis]]}
https://ideone.com/qnWaUr
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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