in Java Write a program that accepts a date (month, day, year) and a number. cal

Question

in Java
Write a program that accepts a date (month, day, year) and a number.
calculate the date, that number of days in the future, from the input date that will be.
don't forget leap year
http://www.timeanddate.com/date/leapyear.html

You must have at least 2 methods. 1 must return a value, 1 must receive parameters. It could be 1 method that does both of these, but you still must have at least 2 methods
keep going until a sentinel is entered for the month (if a sentinel is entered for the month there is no need to enter a day and year)
check the validity of the date entered (example: 1/32 is no good, 9/31 is no good
2/29/2001 is no good, remember 2/29/2000 is good)

Explanation / Answer

import java.util.Scanner;

public class date

{
public static void main(String[] args)
{
int day, month, year, dayNumber;
char ch;
Scanner input = new Scanner(System.in);
System.out.println("Enter a day");
day = input.nextInt();
System.out.println("Enter a month");
month = input.nextInt();
System.out.println("Enter a year");
year = input.nextInt();
dayNumber = 0;
while ( month > 1 )
     {
switch( month - 1 )
      {
  case 1 :
  case 3 :
  case 5 :
  case 7 :
  case 8 :
  case 10 :
  case 12 :
   dayNumber += 31;
      break;
  case 4 :
  case 6 :
  case 9 :
  case 11 :
   dayNumber += 30;
   break;
  
  case 2 :
   dayNumber += 28;
                      if ( isLeapYear( year ) )
                    dayNumber++;
                break;

       }
month--;
}

dayNumber += day;

System.out.println(" The day number is "+dayNumber);

}

}

public class sLeapYear
{

if (( ( year % 4 == 0 ) && ( year % 100 != 0 ) ) ||( ( year % 100 == 0 ) && ( year % 400 == 0 ) ) )
return true;

return false;

}

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