import java.util.Scanner;
  public class DateTester
  {

public static final int JAN = 1;
public static final int FEB = 2;
public static final int MAR = 3;
public static final int APR = 4;
public static final int MAY = 5;
public static final int JUN = 6;
public static final int JUL = 7;
public static final int AUG = 8;
public static final int SEP = 9;
public static final int OCT = 10;
public static final int NOV = 11;
public static final int DEC = 12;
public static final String oldDate = "JAN-01-2000";

private int currentDate;
private int currentMonth;
private int currentDay;
private int currentYear;


private int oldDay = 01;
private int oldYear = 2000;

private int currentMonthCopy;
private int currentDayCopy;
private int currentYearCopy;

public int month;
public int day;
public int year;
public static int m;
public int d;
public int y;
public String monthHolder;
public String monthChars;
public static String d1;
public String result;
public int months;
public boolean isEqual;
public int dayNumber;
public static int amt;
public static int placeHolder;
public static int daysApart;
public static int yearHolder;

     Scanner keyboard = new Scanner(System.in);
 
 /* main method, creates new hangmang class, runs set date methods **/
     public static void main( String[] args)
     {
        DateTester initialDate = new DateTester();
  System.out.println(" enter a date in format of  MM  DD YYYY.");
        initialDate.setDate();
  initialDate.getCurrentDate();
    initialDate.toString();  
  System.out.println(" the day number is .");
  initialDate.getDayNumber(m);
  initialDate.addDays(amt);
  initialDate.compareTo(d1);
     }
 
 
  //default constructor
public DateTester()
{
 currentMonth = JAN;
 currentDay = 1;
 currentYear = 2000;
}
 
// constructor taking three parameters, day month year
public DateTester (int month, int day, int year)
{
 currentMonth =  month;
 currentDay = day;
 currentYear = year;
 
}
 
// copy constructor FOR MONTH in this case
public int DateTesterCopy (DateTester d)
{
 currentMonthCopy =  month;
 currentDayCopy = day;
 currentYearCopy = year;
 return currentMonthCopy;
}
 


//accessor methods for each
public int getMonth()
{
 return currentMonth;
}

 public int getDay()
{
 return currentDay;
}

 public int getYear()
{
 return currentYear;
}

 public void getCurrentDate()
{
 System.out.println(currentMonth + "-" + currentDay + "-" + currentYear);
}


// mutator methods for each

 public void setMonth (int m)
  {
  System.out.println(" enter month as integer ie jan = 01 :");
  //monthHolder = keyboard.next();
  //m = months;
  m = keyboard.nextInt();
  /* if ((m < 1) || (m >12))
  {
  throw new Exception("please enter a valid month, between 1 and 12" );
  }
  else
  {  
  currentMonth = m;
  }
  **/
  currentMonth = m;
  }
 
 public void setDay (int d)
  {
  System.out.println(" enter day as integer, ie for 15th of jan, enter 15:");
  d = keyboard.nextInt();
  currentDay = d;
  }
 
 public void setYear (int y)
  {
  System.out.println(" enter year as integer, ie 2002:");
  y = keyboard.nextInt();
  currentYear = y;
  }
 
 
  // skipped using enum methods
 /*public enum Months
  {
     JANUARY ,
  FEBRUARY ,
  MARCH ,
  APRIL ,
  MAY ,
  JUNE ,
  JULY ,
  AUGUST ,
  SEPTEMBER ,
  OCTOBER ,
  NOVEMBER ,
  DECEMBER ,
    }
     
 public Months ToInt(Months Input)
  {
    return (int)Enum.Parse(typeof(Months), Input, true);
  }  
 **/
 
 public void setDate ()
  {
  setMonth(m);
  setDay(d);
  setYear(y);
  System.out.print(" the current date is set to ");
  }
 
 
 
 /*
 String result = formatDate( monthChars, currentDay, currentYear);
  public  String formatDate( String monthChars, int currentDay, int currentYear )
 {
   {
     return String.format("testing code here %s!", monthChars, currentDay, currentYear);
     }
 
 }
 **/
 
 public String toString()
  {
   do
   {
   switch(currentMonth)
    {
    case 01: monthChars = "JAN";
    break;
    case 02: monthChars = "FEB";
    break;
    case 03: monthChars = "MAR";
    break;
    case 04: monthChars = "APR";
    break;
    case 05: monthChars = "MAY";
    break;
    case 06: monthChars = "JUN";
    break;
    case 07: monthChars = "JUL";
    break;
    case 8: monthChars =  "AUG";
    break;
    case 9: monthChars = "SEP";
    break;
    case 10: monthChars = "OCT";
    break;
    case 11: monthChars = "NOV";
    break;
    case 12: monthChars = "DEC";
    break;
    default:
    System.out.println("invalid month specified");
    }
   } while (currentMonth >12);
   
   d1 = monthChars + "-" + currentDay + "-" + currentYear;
  System.out.println(" my date is " + d1);
  return d1;
  }
  // same check is used in compare to;
 /* public boolean equals (String d1)
  {
   if (oldDate.compareTo(d1)== 0)
   {
    return true;
   }
  else
   {
   return false;
   }
  }
 
  **/
 
 public int getDayNumber(int m)
  {
     
   switch(currentMonth)
    {
    case 01: dayNumber = 0 + currentDay;
    break;
    case 02: dayNumber = 31 + currentDay;
    break;
    case 03: dayNumber = 59 + currentDay;
    break;
    case 04: dayNumber = 90 + currentDay;
    break;
    case 05: dayNumber = 120 + currentDay;
    break;
    case 06: dayNumber = 151 + currentDay;
    break;
    case 07: dayNumber = 181 + currentDay;
    break;
    case 8:  dayNumber =  212 + currentDay;
    break;
    case 9: dayNumber = 243 + currentDay;
    break;
    case 10: dayNumber = 273 + currentDay;
    break;
    case 11: dayNumber = 304 + currentDay;
    break;
    case 12: dayNumber = 334 + currentDay;
    break;
    default:
    System.out.println("invalid month specified");

    }
   
   System.out.println(dayNumber);
   getDaysApart(dayNumber);
   return dayNumber;
  }
 
 
 
 
 
  //adds days
  public void addDays (int amt)
  {
   System.out.println("enter days to be subtracted or added from JAN-01-2000");
   amt = keyboard.nextInt();
   
 
   
  {
   
   if (amt > 0)
   {
   monthChars = "JAN";
   currentDay = amt;
   }
   else if (amt > 59)
   {
   monthChars = "FEB";
   currentDay = amt%31;
   }
     
   else if (amt > 90)
   {
   monthChars = "MAR";
   currentDay = amt%59;
   }
   
   else if (amt > 120)
   {
   monthChars = "APR";
   currentDay = amt%90;
   }
   
   else if (amt > 151)
   {
   monthChars = "MAY";
   currentDay = amt%120;
   }
   
   else if (amt > 181)
   {
   monthChars = "JUN";
   currentDay = amt%151;
   }
   
   else if (amt > 212)
   {
   monthChars = "JUL";
   currentDay = amt%181;
   }
   
   else if (amt > 243)
   {
   monthChars = "AUG";
   currentDay = amt%212;
   }
   
   else if (amt > 273)
   {
   monthChars = "SEP";
   currentDay = amt%243;
   }
   
   else if (amt > 304)
   {
   monthChars = "OCT";
   currentDay = amt%273;
   }
   
   else if (amt > 334)
   {
   monthChars = "NOV";
   currentDay = amt%273;
   }
   
   else if (amt > 364)
   {
   monthChars = "DEC";
   currentDay = amt%334;
   }
   
   if (amt > 365)
   {
   oldYear = oldYear +(amt/365);
   amt = amt % 365;
   }
   // subtraction
   
   else if  (amt < 0)
   {
   oldYear --;
   oldYear = oldYear +(amt/365);
   amt = amt%365;
   monthChars = "DEC";
   currentDay = 31 + amt;
   }
   
   
   else if (amt < -31)
   {
   monthChars = "NOV";
   placeHolder= amt%31;
   currentDay = 30 + placeHolder;
   }
   else if (amt < -61)
   {
   monthChars = "OCT";
   placeHolder = amt%61;
   currentDay = 31 + placeHolder;
   }
     
   else if (amt < -92)
   {
   monthChars = "SEP";
   placeHolder = amt%92;
   currentDay = 30 + placeHolder;
   }
   
   else if (amt < -122)
   {
   monthChars = "AUG";
   placeHolder = amt%122;
   currentDay = 31 + placeHolder;
   }
   
   else if (amt < -153)
   {
   monthChars = "JUL";
   placeHolder = amt%153;
   currentDay = 31 + placeHolder;
   }
   
   else if (amt < -184)
   {
   monthChars = "JUN";
   placeHolder = amt%184;
   currentDay = 30 + placeHolder;
   }
   
   else if (amt < -214)
   {
   monthChars = "MAY";
   placeHolder = amt%214;
   currentDay = 31 + placeHolder;
   }
   
   else if (amt < -245)
   {
   monthChars = "APR";
   placeHolder = amt%245;
   currentDay = 30 + placeHolder;
   }
   
   else if (amt < -275)
   {
   monthChars = "MAR";
   placeHolder = amt%275;
   currentDay = 31 + placeHolder;
   }
   
   else if (amt < -306)
   {
   monthChars = "FEB";
   placeHolder = amt%306;
   currentDay = 28 + placeHolder;
   }
   
   else if (amt < -334)
   {
   monthChars = "JAN";
   placeHolder = amt%334;
   currentDay = 31 + placeHolder;
   }
   
   else if ((amt < -364) && (amt >= -365))
   {
   monthChars = "JAN";
   placeHolder = amt%334;
   currentDay = 31 + placeHolder;
   }

   d1 = monthChars + "-" + currentDay + "-" + oldYear;
   System.out.println(d1);
   
   }
 
  }
  // tells which date comes first
  public int compareTo (String d1)
  {
  if (d1.compareTo(oldDate)<0)
   {
   System.out.println(d1 + " precedes " + oldDate);
   }
  else if (d1.compareTo(oldDate)>0)
   {
   System.out.println(d1 + " comes after " + oldDate);
   }
  else if (d1.compareTo(oldDate)==0)
  {
  System.out.println(d1 + " is the same as " + oldDate);
  }
  return 0;
  }
  // tells how many days apart original date and inputed date are
  public int getDaysApart (int dayNumber)
  {
  daysApart = 0 + dayNumber;
  yearHolder = oldYear - currentYear;
  daysApart = daysApart + ((Math.abs(yearHolder))*365);
  System.out.println( " the new date " + d1 + " and the old date " +  oldDate + " are " + daysApart + " days apart ");
  return daysApart;
  }
 
 }
 
 
 

if (amt > 0)
  {
  monthChars = "JAN";
  currentDay = amt;
  }

     if ( amt >= 0 && amt < 59 ) {
       monthChars = "JAN";
       currentDay = amt;
     }