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  1. Prepare
  2. Java
  3. Introduction
  4. Java Date and Time
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Java Date and Time

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  • qian_li_ok
     + 0 comments
    public static String findDay(int month, int day, int year) {
    LocalDate date = LocalDate.of(year, month, day);
    return date.getDayOfWeek().toString();
}

  • oren14
     + 0 comments
      public static String findDay(int month, int day, int year) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(year, month - 1, day);
        return calendar.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG,Locale.getDefault()).toUpperCase();
        
    };

  • ddebajyati
     + 0 comments

    I couldn't figure out how to solve the problem using the Calender class.

    So I used LocalDateTime and DateTimeFormatter classes instead. This approach appears clearer to me also. Note :- You would also need to import java.time.LocalDateTime and java.time.format.DateTimeFormatter on the toplevel of the file. This is the code of the method - 

    public static String findDay(int month, int day, int year) {
        LocalDateTime date = LocalDateTime.of(year, month, day,0,0);
        
        DateTimeFormatter dateFormat = DateTimeFormatter.ofPattern("EEEE");
        
        String formattedDate = date.format(dateFormat).toString();
        
        String DAY = formattedDate.toUpperCase();
        return DAY;
    }

  • mucahit_yilmaz91
     + 1 comment

    /* * Complete the 'findDay' function below. * * The function is expected to return a STRING. * The function accepts following parameters: * 1. INTEGER month * 2. INTEGER day * 3. INTEGER year */

    public static String findDay(int month, int day, int year) {
    Calendar g = new GregorianCalendar();
    g.set(Calendar.YEAR, year);
    g.set(Calendar.MONTH, month-1);
    g.set(Calendar.DAY_OF_MONTH, day);
    return g.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.getDefault()).toUpperCase();
}

  • meghanarnaidu201
     + 1 comment

    Hi i am not able to solve some this problem because they have used built-in functions. So where can i learn these concepts as hackerrank is solving the questions but we need know the basics.