Assignemnt #96 and Weekday Calculator

Code

/// Name: Kyle Ivy
/// Period: 5
/// Program Name: WeekdayCalculator
/// File Name: WeekdayCalculator.java
/// Date Finished: 4/20/2016

    import java.util.Scanner;

    public class WeekdayCalculator
    {
        public static void main( String[] args ) 
        {
            Scanner keyboard = new Scanner(System.in);
            
            System.out.println( "Welcome to Mr. Davis's fantastic Birth-o-Meter! " );
            System.out.println();
            System.out.println( "All you have to do is enter your birthday, and it will tell you the day of the week on which you were born. " );
            
            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( "Birthday (mm dd yyyy): " );
            int mm = keyboard.nextInt();
            int dd = keyboard.nextInt();
            int yyyy = keyboard.nextInt();
            
            System.out.println( "You were born on " + weekday( mm, dd, yyyy ) + "!" );
        }
        
        public static String weekday( int mm, int dd, int yyyy )
            {
                int yy = yyyy - 1900;
                int total, leftover;
                String date = "";
                total = (yy/4) + yy + dd + monthOffset(mm);
        
                if ( isLeap(yyyy) == true && ( mm == 1 || mm == 2 ) )
                    total = total - 1;
                
            
                leftover = total%7 ;
                leftover = leftover - 1;
            
                date = WeekdayName(leftover) + ", " + month_name(mm) + ", " + yyyy;
            
                return date;
            }
        public static int monthOffset( int mm )
        	{
        		int result;
        		if (mm == 1) result = 1;
                else if (mm == 2) result = 4;
                else if (mm == 3) result = 4;
                else if (mm == 4) result = 0;
                else if (mm == 5) result = 2;
                else if (mm == 6) result = 5;
                else if (mm == 7) result = 0;
                else if (mm == 8) result = 3;
                else if (mm == 9) result = 6;
                else if (mm == 10) result = 1;
                else if (mm == 11) result = 4;
                else if (mm == 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;
        	}
            
        public static String WeekdayName( int remain )
                {
                    String result;
                    
                    if (remain == 0)
                        result = "Sunday";
                    else if (remain == 1)
                        result = "Monday";
                    else if (remain == 2)
                        result = "Tuesday";
                    else if (remain == 3)
                        result = "Wednesday";
                    else if (remain == 4)
                        result = "Thursday";
                    else if (remain == 5)
                        result = "Friday";
                    else if (remain == 6)
                        result = "Saturday";
                    else
                        result = "ERROR";
                        
                    return result;
                }
            
        public static String month_name( int mm )
            	{
            		String result;
            		
                    if (mm == 1)
                        result = "January";
                    else if (mm == 2)
                        result = "February";
                    else if (mm == 3)
                        result = "March";
                    else if (mm == 4)
                        result = "April";
                    else if (mm == 5)
                        result = "May";
                    else if (mm == 6)
                        result = "June";
                    else if (mm == 7)
                        result = "July";
                    else if (mm == 8)
                        result = "August";
                    else if (mm == 9)
                        result = "September";
                    else if (mm == 10)
                        result = "October";
                    else if (mm == 11)
                        result = "November";
                    else if (mm == 12)
                        result = "December";
                    else
                        result = "ERROR";
                        
            		return result;
            	}
    
    }

 
    
    

prog96.PNG