/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import java.time.* ;
import java.time.format.* ;
import java.time.temporal.* ;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
    OffsetDateTime odt = OffsetDateTime.parse( "2018-10-21T01:00:00.000-02:00" ) ;
    ZoneOffset offset = ZoneOffset.ofHours( -3 ) ;
    OffsetDateTime odt2 = odt.withOffsetSameInstant​( offset ) ;  // Same moment, same point on the timeline, different wall-clock time.
 
    Instant instant1 = odt.toInstant() ;  // Adjust to UTC.
    Instant instant2 = odt2.toInstant() ;
    boolean sameMoment = instant1.equals( instant2 ) ; 
 
    OffsetDateTime differentMomentButSameTimeOfDay = odt. withOffsetSameLocal( offset ) ;
    Instant differentInstant = differentMomentButSameTimeOfDay.toInstant() ;
 
	System.out.println( "odt.toString(): " + odt ) ;
	System.out.println( "odt2.toString(): " + odt2 ) ;
	System.out.println( "instant1.toString(): " + instant1 ) ;
	System.out.println( "instant2.toString(): " + instant2 ) ;
	System.out.println( "sameMoment.toString(): " + sameMoment ) ;
	System.out.println( "differentMomentButSameTimeOfDay.toString(): " + differentMomentButSameTimeOfDay ) ;
	System.out.println( "differentInstant.toString(): " + differentInstant ) ;
 
 
	}
}

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