import java.util.Calendar;

import java.util.Date;

​

public class Main

{

    public static void main(final String[] args)

    {

        Date today = new Date();

        System.out.println("Is weekend : " + isWeekend(today));

​

        @SuppressWarnings("deprecation")

        Date someDate = new Date(2021, 0, 2);

        System.out.println("Is weekend : " + isWeekend(someDate));

    }

​

    public static boolean isWeekend(final Date d)

    {

        Calendar cal = Calendar.getInstance();

        cal.setTime(d);

​

        int day = cal.get(Calendar.DAY_OF_WEEK);

        return day == Calendar.SATURDAY || day == Calendar.SUNDAY;

    }

}