BlueJ program to find the date after specified number of days from a date

import java.io.*;
class DayCount
{
BufferedReader r=new BufferedReader(new InputStreamReader(System.in));
int year;int b=0,m,n,i;
int a[]={31,28,31,30,31,30,31,31,30,31,30,31};
int flag=0,mon;
public void takeData() throws Exception
{
System.out.println("Enter the Date:");
b=Integer.parseInt(r.readLine());
System.out.println("Enter the Month Number:");
i=Integer.parseInt(r.readLine());

System.out.println("Enter the year:");
year=Integer.parseInt(r.readLine());
System.out.println("Enter the number of days after which you want the date:");
n=Integer.parseInt(r.readLine());
if(year%100==0 && year%400==0)
flag=1;
else if(year%100!=0 && year %4==0)
flag=1;
for(;;)
{
b=b+a[i];
if(i==2)
{
b=b+flag;
flag=0;
}
if(b >n)
break;
i=i+1;
if(i >11)
{
year++;
if(year%100==0 && year%400==0)
flag=1;
else if(year%100!=0 && year %4==0)
flag=1;

i=0;
}
}
b=b-a[i];
n=n-b+1;
//i=i+1;
System.out.print(n+",");
switch(i)
{
case 1:
System.out.print("January");
break;
case 2:
System.out.print("February");
break;
case 3:
System.out.print("March");
break;
case 4:
System.out.print("April");
break;
case 5:
System.out.print("May");
break;
case 6:
System.out.print("June");
break;
case 7:
System.out.print("July");
break;
case 8:
System.out.print("August");
break;
case 9:
System.out.print("September");
break;
case 10:
System.out.print("October");
break;
case 11:
System.out.print("November");
break;
case 12:
System.out.print("December");
break;
}
System.out.println(" "+year);
}
public static void main(String args[]) throws Exception
{
 DayCount ob=new DayCount();
 ob.takeData();
 }
}


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