Assignemnt #96: Weekday Calculator

Code

    /// Name: Kelsey Lieberman
    /// Period 5
    /// Program Name: WeekdayCalculator
    /// File Name: WeekdayCalculator.java
    /// Date Finished: 1/15/2016
    
import java.util.Scanner;

public class WeekdayCalculator
{
	public static void main( String[] args )
	{
		Scanner keyboard = new Scanner(System.in);

		System.out.println("Welcome to Kdawgg's fantastic birth-o-meter!");
		System.out.println();
		System.out.println("All you have to do is enter your birth date, and it will");
		System.out.println("tell you the day of the week on which you were born.");
		System.out.println();
		System.out.println("Some automatic tests....");
		System.out.println("12 10 2003 => " + weekday(12,10,2003));
		System.out.println(" 2 13 1976 => " + weekday(2,13,1976));
		System.out.println(" 2 13 1977 => " + weekday(2,13,1977));
		System.out.println(" 7  2 1974 => " + weekday(7,2,1974));
		System.out.println(" 1 15 2003 => " + weekday(1,15,2003));
		System.out.println("10 13 2000 => " + weekday(10,13,2000));
		System.out.println();

		System.out.println("Now it's your turn!  What's your birthday?");
		System.out.print("Birth date (mm dd yyyy): ");
		int mm = keyboard.nextInt();
		int dd = keyboard.nextInt();
		int yyyy = keyboard.nextInt();

		// put a function call for weekday() here
		System.out.println("You were born on " + weekday(mm, dd, yyyy));
	}


	public static String weekday( int mm, int dd, int yyyy )
	{
		int yy, total, wkdy;
		String date = "";

		yy = (yyyy - 1900);
        total = ((yy/4) + yy + dd + monthOffset(mm));
        
        if ((MonthName(mm) == "January" || MonthName(mm) == "February") && isLeap(yyyy) == true)
            total = total -1;
        
        wkdy = total%7;

		date = WeekdayName(wkdy) + ", " + MonthName(mm) + " " + dd + ", " + yyyy;

		return date;
	}


	// paste your functions from MonthName, WeekdayName, and MonthOffset here
        public static String WeekdayName(int v)
        {
            String weekday;
            
            if (v == 1)
                weekday = "Sunday";
            else if (v == 2)
                weekday = "Monday";
            else if (v == 3)
                weekday = "Tuesday";
            else if (v == 4)
                weekday = "Wednesday";
            else if (v == 5)
                weekday = "Thursday";
            else if (v == 6)
                weekday = "Friday";
            else if (v == 7)
                weekday = "Saturday";
            else 
                weekday = "Error";
                
            return weekday;
        }
                
        public static String MonthName(int x)
        {
            String z;
        
            if (x == 1)
                z = "January";
            else if (x == 2)
                z = "February";
            else if (x == 3)
                z = "March";
            else if (x == 4)
                z = "April";
            else if (x == 5)
                z = "May";
            else if (x == 6)
                z = "June";
            else if (x == 7)
                z = "July";
            else if (x == 8)
                z = "August";
            else if (x == 9)
                z = "September";
            else if (x == 10)
                z = "October";
            else if (x == 11)
                z = "November";
            else if (x == 12)
                z = "December";
            else
                z = "Error";
        
            return z;
        }
    
	    public static int monthOffset( int month )
        {
		  int result;
		  
            if (month == 1)
                result = 1;
            else if (month == 2)
                result = 4;
            else if (month == 3)
                result = 4;
            else if (month == 4)
                result = 0;
            else if (month == 5)
                result = 2;
            else if (month == 6)
                result = 5;
            else if (month == 7)
                result = 0;
            else if (month == 8)
                result = 3;
            else if (month == 9)
                result = 6;
            else if (month == 10)
                result = 1;
            else if (month == 11)
                result = 4;
            else if (month == 12)
                result = 6;
            else
                result = -1;
		
		  return result;
	   }
    
	public static boolean isLeap( int year )
	{
		// years which are evenly divisible by 4 are leap years,
		// but years divisible by 100 are not leap years,
		// though years divisible by 400 are leap years
		boolean result;

		if ( year%400 == 0 )
			result = true;
		else if ( year%100 == 0 )
			result = false;
		else if ( year%4 == 0 )
			result = true;
		else
			result = false;
		
		return result;
	}
}
    

Picture of the output