/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.time.* ;
import java.util.stream.* ;
 
/* 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
	{
		LocalDate start = LocalDate.parse( "2023-01-03" );
		DayOfWeek dayOfWeek = start.getDayOfWeek();
		LocalDate stop = start.withDayOfMonth( 1 ).plusMonths( 1 ); // Using Half-Open approach, running up to but not including first day of following month. End date is *exclusive* while the start date is *inclusive*. 
 
		List < LocalDate > datesInSameMonthWithSameDayOfWeek =
		        start
		                .datesUntil( stop )
		                .filter(
		                        date -> date.getDayOfWeek().equals( dayOfWeek )
		                )
		                .collect( Collectors.toUnmodifiableList() )  // In Java 16+, simplify to .toList().
		;
 
		System.out.println( datesInSameMonthWithSameDayOfWeek );
	}
}

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