HackerRank Java Date and Time problem solution

In this HackerRank Java Date and Time problem in a java programming language, You are given a date. You just need to write the method, getDay, which returns the day on that date.

HackerRank Java Date and Time problem solution.

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

class Result {

    /*
     * 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 cal = Calendar.getInstance();
        cal.set(Calendar.MONTH,month-1);
        cal.set(Calendar.DAY_OF_MONTH,day);
        cal.set(Calendar.YEAR,year);
String dayOfWeek = cal.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.US).toUpperCase();
        return dayOfWeek;

    }

}

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

        int month = Integer.parseInt(firstMultipleInput[0]);

        int day = Integer.parseInt(firstMultipleInput[1]);

        int year = Integer.parseInt(firstMultipleInput[2]);

        String res = Result.findDay(month, day, year);

        bufferedWriter.write(res);
        bufferedWriter.newLine();

        bufferedReader.close();
        bufferedWriter.close();
    }
}

Second solution in java8 programming.

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        try (Scanner scanner = new Scanner(System.in)) {
			int month = scanner.nextInt();
			int day = scanner.nextInt();
			int year = scanner.nextInt();

			Calendar calendar = Calendar.getInstance();
			calendar.set(Calendar.DATE, day);
			calendar.set(Calendar.MONTH, month - 1);
			calendar.set(Calendar.YEAR, year);

			System.out.println(calendar.getDisplayName(Calendar.DAY_OF_WEEK,
					Calendar.LONG, new Locale("en", "US")).toUpperCase());
		}
    }
}

Third solution

import java.util.Arrays;
import java.util.Calendar;
import java.util.List;
import java.util.Scanner;

public class JavaDateAndTime {
    static List<String> days = Arrays.asList("SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY");
    
    public static String getDay(String day, String month, String year) {
          
        int y = Integer.parseInt(year);
        int m = Integer.parseInt(month);
        int d = Integer.parseInt(day);
          
        Calendar c = Calendar.getInstance();
        c.set(y, m-1, d); 
            
        int p = c.get(Calendar.DAY_OF_WEEK);
        String s = days.get(p-1);
        return s;
    }
    
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String month = in.next();
        String day = in.next();
        String year = in.next();
        
        System.out.println(getDay(day, month, year));
        
    }
}