JavaDateAndTime.java

/*
The Calendar class is an abstract class that provides methods for converting between a specific instant in time and a set of calendar fields such as 
YEAR, MONTH, DAY_OF_MONTH, HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.
You are given a date. You just need to write the method, getDay, which returns the day on that date. To simplify your task, 
we have provided a portion of the code in the editor.

Example
month = 8
day = 14
year = 2017

The method should return MONDAY as the day on that date.
Function Description

Complete the findDay function in the editor below.

findDay has the following parameters:

int: month
int: day
int: year
Returns

string: the day of the week in capital letters
Input Format

A single line of input containing the space separated month, day and year, respectively, in MM DD YYY format.

Constraints

Sample Input

08 05 2015
Sample Output

WEDNESDAY
*/

import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;
import java.time.LocalDate;

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) {
        LocalDate dt = LocalDate.of(year, month, day);
        return ""+dt.getDayOfWeek();
    }

}

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();
    }
}