Java. Modify the Date class. Change the type of isLeapYear to boolean and add the method addDays. The Date class must contain the following methods ( Make sure that these are the only methods that exist in the Data class.):

public Date(int day, int month, int year) -- Constructs a new Date object to represent the given date

public int getDay() -- returns the day value of this date

public int getMonth() -- returns the month value of this date

public int getYear() -- returns the year value of this date

public void addDays(int days) -- Moves the Date object forward in time by the given number of days

public int daysTo(Date other) -- Returns the number of days between this Date and the other Date

public boolean isLeapYear() -- Returns true if the year of this Date is a leap year. A leap year occurs when the value of the year is divisible by 4, except when it is divisible by 100 and not 400 (so 1700, 1800, and 1900 are not leap years)

public String toString() -- returns a String representation of this date in the form day/month/year

Date class

import java.io.*;

public class Date {

// Declaring instance variables

private int day;

private int month;

private int year;

// Parameterized constructor

public Date(int day, int month, int year) {

this.day = day;

this.month = month;

this.year = year;

}

// getters and setters

public int getDay() {

return day;

}

public void setDay(int day) {

this.day = day;

}

public int getMonth() {

return month;

}

public void setMonth(int month) {

this.month = month;

}

public int getYear() {

return year;

}

public void setYear(int year) {

this.year = year;

}

// This method will calculate the difference between two dates

public int daysTo(Date d) {

int months[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

int m1=0,m2=0;

int nod1 = getYear(); //copy year into nod1

int y1=nod1*365; //get all days of all years

int nod2 =getMonth();

for(int i=0;i

m1=m1+months[i]; // get all days of all months

int nod3=getDay();

int total1=nod3+m1+y1; //calculate total days in that date

int nod4 =d.getYear();

int y2=nod4*365; //get all days of all years

int nod5 = d.getMonth();

for(int i=0;i

m2=m2+months[i]; // get all days of all months

int nod6=d.getDay();

int total2=y2+m2+nod6; //calculate total days in that date

int diff = 0;

int leapy=0;

if (nod1 > nod4) //check which date is maximum to find difference

{

diff =total1-total2; //calculate difference between to dates

leapy=leapYears(nod1,nod4); // calling leapYears() method to get number of leap days between two dates

//without leap adding leap year days

}

else if (nod1 < nod4) //calculate difference between to dates

{

diff = total2-total1; // calling leapYears() method to get number of leap days between two dates

//without leap adding leap year days

leapy=leapYears(nod1,nod4);

}

else{

if(nod2>nod5){

diff =total1-total2; //calculate difference between to dates

//leapy=leapYears(nod1,nod4); // calling leapYears() method to get number of leap days between two dates

//without leap adding leap year days

//return diff;

}

else{

diff =total2-total1; //calculate difference between to dates

//leapy=leapYears(nod4,nod1); // calling leapYears() method to get number of leap days between two dates

//without leap adding leap year days

//return diff;

}

}

return leapy+diff; // returns total diff days + total leap year days (which is 29th-Feb)

}

// This method will check how many leap years

public int leapYears(int n1,int n2) // this method return number of leap years between two dates

// year values from two dates passed as parameter

{

int a=n2;

int b=n1;

int n=0;

if(a>=b)

{

while(a>=b) // checking one by one leap year

// if first year value is greater than other then condition checked as.....

{

if ((a % 100 == 0 && a % 400 == 0) || (a % 100 != 0 && a % 4 == 0))

n++; // counting leap years

a--;

}

}else

{

while(b>a) // if first year value is greater than other then condition checked as.....

if ((b % 100 == 0 && b % 400 == 0)|| (b % 100 != 0 && b % 4 == 0))

n++;

b--;

}

return n;

}

// toString() method is used to display the contents of an object

@Override

public String toString() {

return day + "/" + month + "/" + year;

}

}

Test Class

import java.util.*; public class Client { public static void main(String[] args) { //Declaring variables int month1,day1,year1,month2,day2,year2; /* * Creating an Scanner class object which is used to get the inputs * entered by the user */ Scanner sc = new Scanner(System.in); //Getting the input entered by the user System.out.print("Enter day of first date:"); day1=sc.nextInt(); System.out.print("Enter month of first date:"); month1=sc.nextInt(); System.out.print("Enter year of first date:"); year1=sc.nextInt(); //Creating an Instance of Date class Date d1=new Date(day1, month1, year1); //Getting the input entered by the user System.out.print("Enter day of second date:"); day2=sc.nextInt(); System.out.print("Enter month of second date:"); month2=sc.nextInt(); System.out.print("Enter year of second date:"); year2=sc.nextInt(); //Creating an Instance of Date class Date d2=new Date(day2, month2, year2); //Displaying the difference between two dates System.out.println("There are "+d1.daysTo(d2)+" days between "+d1.toString()+" and "+d2.toString()); } }