public class HelloWorld{

    public static void main(String[] args) {
        date d = new date(3, 6, 1973);
        d.print();
        date d1 = new date(3, 6, 1973);
        date d2 = new date(3, 24, 2015);
        date d3 = new date(1, 3, 2000);
        date d4 = new date(7, 4, 1973);
        date d5 = new date(3, 6, 1991);
        date current = new date();
        System.out.println(d1.ageAsOf(d2));
        System.out.println(d1.ageAsOf(d3));
        System.out.println(d1.ageAsOf(d4));
        System.out.println(d1.ageAsOf(d5));


       System.out.println(d1.compareTo(d2));
       System.out.println(d2.compareTo(d1));
       System.out.println(d1.compareTo(d1));


        date bday = new date(6, 23, 1998);
        Pet fifi = new Pet("Fifi", "cat", bday);


    }
}



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import java.util.Calendar;

public class date {
    //properties
    private int year;
    private int month;
    private int day;

    //constructors (part a)
    public date(int m, int d, int y){
        month = m;
        day = d;
        year = y;
    }
    public date(int m, int d){
        month = m;
        day = d;
         Calendar now = Calendar.getInstance();
        year = now.get(Calendar.YEAR);
    }
    public date(){
         Calendar now = Calendar.getInstance();
        year = now.get(Calendar.YEAR);
        month = now.get(Calendar.MONTH) + 1; //see note below
        day = now.get(Calendar.DATE);
    }

    //getters and setters (part b)
    public int getYear(){
        return year;
    }
    public int getMonth(){
        return month;
    }
    public int getDay(){
        return day;
    }
    public void setYear(int y){
        y = year;
    }
    public void setMonth(int m){
        m = month;
    }
    public void setDay(int d){
        d = day;
    }

    //other methods (parts c-e)
    public void print(){
        String[] mo = {"", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
        System.out.println(mo[month] + " " + day + ", " + year);
    }
    public int compareTo(date other){
        if(other.year > this.year){
           return -1;
        }
        if(other.year < this.year){
           return 1;
        }
        if(other.year == this.year){
           if(other.month > this.month){
            return -1;
        }
            if(other.month < this.month){
            return 1;
        }
             if(other.month == this.month){
                 if(other.day > this.day){
                return -1;
                    }
                    if(other.month < this.month){
                    return 1;
                     }
            }
    }
    return 0;
    }
    public int ageAsOf(date d){
        if(d.month < this.month){
                return d.year-this.year-1;
            }
        if(d.month == this.month){
           if(d.day < this.day){
               return d.year-this.year-1;
            }
              if(d.day >= this.day){
               return d.year-this.year;
            }
        }


        if(d.month > this.month){
            return d.year - this.year;

         }
         return d.year - this.year;
    }
    public int ageAsOf(date current){
        if(current.month < this.month){
                return current.year-this.year-1;
            }
        if(current.month == this.month){
           if(current.day < this.day){
               return current.year-this.year-1;
            }
              if(current.day >= this.day){
               return current.year-this.year;
            }
        }


        if(current.month > this.month){
            return current.year - this.year;

         }
         return current.year - this.year;
    }
}



-------------------------------------------------------------------

public class Pet {
    private String name;
    private String type;
    private date birthday; //see, I told you!

    public Pet(String n, String t, date bd){
        n = name;
        t = type;
        bd = birthday;
    }
    public Pet(String n, String t, int month, int day, int year){
        this(n, t, new date(month, day, year));
    }
    //getters and setters (part b)
    public String getName(){
        return name;
    }

    public String getType(){
        return type;
    }

    public date getBirthday(){
        return birthday;
    }

    public void setName(String n){
        name = n;
    }
    //other methods (parts c and d)
    public boolean isBirthday() {
        date current = new date();
        return birthday.getMonth() == current.getMonth() && birthday.getDay() == current.getDay();
    }
    public int getAge(){
         return birthday.ageAsOf(currentDate);
    }
}