/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import java.time.*;
import java.time.format.*;
 
/* 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
	{
 
    String s = 
    LocalTime.MIN.plus(
        Duration.between( 
            LocalTime.of( 12 , 5 , 0 ) ,
            LocalTime.of( 12 , 7 , 0 ) 
        )
    ).toString();
    System.out.println( s );
 
    LocalTime start = LocalTime.now( ZoneId.of( "America/Montreal" ) );
    LocalTime stop = start.plusMinutes( 7 );
    Duration d = Duration.between( start , stop );
    LocalTime result = LocalTime.MIN.plus( d );  // I do *not* recommend abusing `LocalTime` this way. Use `Duration` instead.
    DateTimeFormatter f = DateTimeFormatter.ISO_LOCAL_TIME ;
    String output = result.format( f );
    System.out.println( "output: " + output );
 
	}
}

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