JavaDateAndTime.java

// https://www.hackerrank.com/challenges/java-date-and-time/problem

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Scanner;

public class JavaDateAndTime {
 public static void main(String[] args) {
 Scanner scanner = new Scanner(System.in);
 int month = scanner.nextInt();
 int day = scanner.nextInt();
 int year = scanner.nextInt();
 scanner.close();
 System.out.println(findDay(month, day, year));
 }

 static String findDay(int month, int day, int year) {
 Date date = new GregorianCalendar(year, month - 1, day).getTime();
 return getDayName(date.getDay());
 }

 private static Date createDate(int month, int day, int year) {
 return new Date(year, month, day);
 }

 private static String getDayName(int dayOfWeek) {
 switch (dayOfWeek) {
 case 0 : return "SUNDAY";
 case 1 : return "MONDAY";
 case 2 : return "TUESDAY";
 case 3 : return "WEDNESDAY";
 case 4 : return "THURSDAY";
 case 5 : return "FRIDAY";
 case 6 : return "SATURDAY";
 }
 return "";
 }
}