Please help me fill in the various methods for the program below? The purpose of each file is listed in bold, and since the code itself was lengthy, I had to post two sections of it in several questions. All I need is help with filling in the methods to get the program to work, and then I will edit it to do exactly what I want it to do. Thank you!

Dates. java- Models a Gregorian Date

package datesheapifier;

public class Date implements DateAPI,Comparable { /** * the month */ private int month; /** * the day */ private int day; /** * the year */ private int year; /** * creates an object representing January 1, 1970 */ public Date() { month = 1; day = 1; year = 1970; } /** * creates a valid Gregorian Date * @param mm the month * @param dd the day * @param yyyy the year * @throws IllegalArgumentException when *

 * 1. year is before 1583 * 2. month not in the range 1-12 * 3. day not in the range 1-31 * 4. month is September, April, June or November and day is 31 * 5. month is February, the year is a leap year and day is greater * than 29 * 6. month is February, the year is not a leap year and the day is * greater than 28 * 

*/ public Date(int mm, int dd, int yyyy) throws IllegalArgumentException { boolean leap = (yyyy % 400 == 0)||(yyyy % 4 == 0 && yyyy % 100 != 0); if (yyyy < 1583) throw new IllegalArgumentException("Date(int,int,int): only dates after 1582 are allowed."); if (mm < 0 || mm > 12) throw new IllegalArgumentException("Date(int,int,int): month must be between 1 and 12."); if (dd < 0 || dd > 31) throw new IllegalArgumentException("Date(int,int,int): day must be between 1 and 31."); if ((mm==9 || mm==4 || mm==6 || mm==11) && dd == 31) throw new IllegalArgumentException("Date(int,int,int): this month has only 30 days."); if (mm==2) { if (leap) { if (dd >29) throw new IllegalArgumentException("Date(int,int,int): February has only 29 days in a leap year."); } else { if (dd >28) throw new IllegalArgumentException("Date(int,int,int): February has only 29 days in a leap year."); } } year = yyyy; month = mm; day = dd; } /** * returns the name of the current month * @return the name of the current month */ public String getMonthName() { String[] names ={"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "Decenber"}; return names[month-1]; } /** * gives an integer representing the month * @return a number representing the month of this date */ public int getMonth() { return month; } /** * gives an integer representing the day * @return the day of this date */ public int getDay() { return day; } /** * gives an integer representing the year * @return the year of this date */ public int getYear() { return year; } /** * determines the name of the day of the week of this date * @return the name of the day of the week of this date */ public String getDayOfWeek() { int m; boolean leap = (year % 400 == 0)||(year % 4 == 0 && year % 100 != 0); if (month == 1) { if (leap) m = 5; else m = 0; } else if (month == 2) { if (leap) m = 2; else m = 3; } else if (month == 10) m = 0; else if (month == 5) m = 1; else if (month == 8) m = 2; else if (month == 3 || month == 11) m = 3; else if (month == 6) m = 4; else if (month == 9 || month == 12) m = 5; else m = 6; int v = year % 100; String[] weekDay = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"}; return weekDay[(2*(3 - (year / 100 % 4)) + v + v/4 + m + day) % 7]; } /** * gives the date in the format mm/dd/yyyy * @return a string representation of this date in the format mm/dd/yyyy */ @Override public String toString() { return String.format("%02d/%02d/%d",month,day,year); } /** * determines whether this date is the same as the specified date * @param d a Gregorian date * @return true when this date is the same as the specified data; * otherwise, false */ public boolean equals(Date d) { return month==d.month && day==d.day && year==d.year; } /** * compares this Gregorian date and the specified Gregorian date * @param d a Gregorian date * @return a number less than 0 when this Gregorian date comes before * the specified Gregorian date; a number greater than 0 when this * Gregorian date comes after the specified Gregorian date; otherwise, * 0. */ public int compareTo(Date d) { return (10000*year+100*month+day) - (10000*d.year+100*d.month+d.day); } }

DateAPI.java - Describes fundamental operations on a Gregorian Date

package datesheapifier;

public interface DateAPI { /** * returns the name of the current month * @return the name of the current month */ String getMonthName(); /** * gives an integer representing the month * @return a number representing the month of this date */ int getMonth(); /** * gives an integer representing the day * @return the day of this date */ int getDay(); /** * gives an integer representing the year * @return the year of this date */ int getYear(); /** * determines the name of the day of the week of this date * @return the name of the day of the week of this date */ String getDayOfWeek(); /** * gives the date in the format mm/dd/yyyy * @return a string representation of this date in the format mm/dd/yyyy */ @Override String toString(); /** * determines whether this date is the same as the specified date * @param d a Gregorian date * @return true when this date is the same as the specified data; * otherwise, false */ boolean equals(Date d); /** * compares this Gregorian date and the specified Gregorian date * @param d a Gregorian date * @return a number less than 0 when this Gregorian date comes before * the specified Gregorian date; a number greater than 0 when this * Gregorian date comes after the specified Gregorian date; otherwise, * 0. */ public int compareTo(Date d); } DatesHeapifier: A testbed for a binary heap implementation and the heap sort algorithm using various comparators.

package datesheapifier;

import java.io.FileReader; import java.io.IOException; import java.util.Comparator; import java.util.Scanner;

public class DatesHeapifier { public static void main(String[] args) throws IOException, HeapException { //implement this method } } Heap.java: This class models an array-list-based min binary heap that implements the HeapAPI interface.

https://drive.google.com/file/d/1yOs58bVTVv38L3JW2fCOIz0ZH2UcOF_J/view?usp=sharing

HeapAPI.java: this class reports heap exceptions

https://drive.google.com/file/d/1MTTCS1T_y_QeKYaVfYS8ZRwWAErkCEak/view?usp=sharing