Write a program to accept 2 dates in the string format dd/mm/yyyy and find the difference in days between the 2 dates.
Example:
INPUT:
Date 1 : 20/12/2012
Date 2 : 11/02/2013
OUTPUT: Difference = 54 days
The program should include the part for validating the inputs namely the date and the day on 1st January of that year.
import java.io.*;
class Date_Difference
{
static BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int month[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
//function for checking for Leap Year
int isLeap(int y)
{
if((y%400==0) || ((y%100!=0)&&(y%4==0)))
return 29;
else
return 28;
}
//function for checking date validation
boolean dateValidate(int d, int m, int y)
{
month[2]=isLeap(y);
if(m<0 || m>12 || d<0 || d>month[m] || y<0 || y>9999)
return false;
else
return true;
}
//function for finding day number from year = 1 till the inputted year
int dayno(int d, int m, int y)
{
int dn=0;
month[2]=isLeap(y);
for(int i=1;i<m;i++)
{
dn=dn+month[i];
}
dn=dn+d;
for(int i=1;i<y;i++)
{
if(isLeap(i)==29)
dn=dn+366;
else
dn=dn+365;
}
return dn;
}
public static void main(String args[])throws IOException
{
Date_Difference ob=new Date_Difference();
System.out.print("Enter the 1st date in (dd/mm/yyyy) format: ");
String date1=br.readLine().trim();
int p,q;
//Extracting the day
p=date1.indexOf("/");
int d1=Integer.parseInt(date1.substring(0,p));
//Extracting the month
q=date1.lastIndexOf("/");
int m1=Integer.parseInt(date1.substring(p+1,q));
//Extracting the year
int y1=Integer.parseInt(date1.substring(q+1));
System.out.print("Enter the 2nd date in (dd/mm/yyyy) format: ");
String date2=br.readLine().trim();
p=date2.indexOf("/");
int d2=Integer.parseInt(date2.substring(0,p));
q=date2.lastIndexOf("/");
int m2=Integer.parseInt(date2.substring(p+1,q));
int y2=Integer.parseInt(date2.substring(q+1));
//Validating both the dates
if(ob.dateValidate(d1,m1,y1)==true && ob.dateValidate(d2,m2,y2)==true)
{
int a=ob.dayno(d1,m1,y1);
int b=ob.dayno(d2,m2,y2);
System.out.print("Output : Difference = "+Math.abs(a-b)+" days.");
}
else
System.out.println("Invalid Date");
}
}
Example:
INPUT:
Date 1 : 20/12/2012
Date 2 : 11/02/2013
OUTPUT: Difference = 54 days
The program should include the part for validating the inputs namely the date and the day on 1st January of that year.
import java.io.*;
class Date_Difference
{
static BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int month[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
//function for checking for Leap Year
int isLeap(int y)
{
if((y%400==0) || ((y%100!=0)&&(y%4==0)))
return 29;
else
return 28;
}
//function for checking date validation
boolean dateValidate(int d, int m, int y)
{
month[2]=isLeap(y);
if(m<0 || m>12 || d<0 || d>month[m] || y<0 || y>9999)
return false;
else
return true;
}
//function for finding day number from year = 1 till the inputted year
int dayno(int d, int m, int y)
{
int dn=0;
month[2]=isLeap(y);
for(int i=1;i<m;i++)
{
dn=dn+month[i];
}
dn=dn+d;
for(int i=1;i<y;i++)
{
if(isLeap(i)==29)
dn=dn+366;
else
dn=dn+365;
}
return dn;
}
public static void main(String args[])throws IOException
{
Date_Difference ob=new Date_Difference();
System.out.print("Enter the 1st date in (dd/mm/yyyy) format: ");
String date1=br.readLine().trim();
int p,q;
//Extracting the day
p=date1.indexOf("/");
int d1=Integer.parseInt(date1.substring(0,p));
//Extracting the month
q=date1.lastIndexOf("/");
int m1=Integer.parseInt(date1.substring(p+1,q));
//Extracting the year
int y1=Integer.parseInt(date1.substring(q+1));
System.out.print("Enter the 2nd date in (dd/mm/yyyy) format: ");
String date2=br.readLine().trim();
p=date2.indexOf("/");
int d2=Integer.parseInt(date2.substring(0,p));
q=date2.lastIndexOf("/");
int m2=Integer.parseInt(date2.substring(p+1,q));
int y2=Integer.parseInt(date2.substring(q+1));
//Validating both the dates
if(ob.dateValidate(d1,m1,y1)==true && ob.dateValidate(d2,m2,y2)==true)
{
int a=ob.dayno(d1,m1,y1);
int b=ob.dayno(d2,m2,y2);
System.out.print("Output : Difference = "+Math.abs(a-b)+" days.");
}
else
System.out.println("Invalid Date");
}
}