how can you calculate you your age in daies??

**hi,

I am beginner in java! can any one help me to write programm to calculate age in daies???**

View Answers

December 9, 2010 at 1:33 PM

Hi Friend,

Try the following code:

import java.util.*;

public class AgeInDays{
      public static void main(String[] args) throws Exception{
        Scanner input=new Scanner(System.in);
        System.out.print("Enter day of your date of birth: ");
        int day=input.nextInt();

        System.out.print("Enter month(in number) of your date of birth: ");
        int month=input.nextInt();

        System.out.print("Enter year of your date of birth: ");
        int year=input.nextInt();
        System.out.println();

        Calendar cal1 = Calendar.getInstance();
        Calendar cal2 = Calendar.getInstance();

        cal1.set(year, month, day);
        cal2.set(2010, 12, 9);

        long milis1 = cal1.getTimeInMillis();
        long milis2 = cal2.getTimeInMillis();

        long diff = milis2 - milis1;
        long diffDays = diff / (24 * 60 * 60 * 1000);
        System.out.println("Your Age is: " + diffDays + " days.");
            }
}

Hope that the above code will be helpful for you.

Thanks

December 9, 2010 at 11:23 PM

thanks alot but how can we cheach if user enter wrong input??

all the best,,,

December 9, 2010 at 11:29 PM

why you use (24 * 60 * 60 * 1000) each number is for what??

December 11, 2010 at 3:59 PM

Hi Friend,

Try this:

import java.util.*;

public class AgeInDays{
      public static void main(String[] args) throws Exception{
        Scanner input=new Scanner(System.in);
        System.out.print("Enter day of your date of birth: ");
        int day=input.nextInt();
        while(day>31){
        if(day<1||day>31){
        System.out.println("Re-Enter day. It should not exceeds 31!");
        day=input.nextInt();
        }
        }

        System.out.print("Enter month(in number) of your date of birth: ");
        int month=input.nextInt();
        while(month>12){
        if(month<1||month>12){
        System.out.println("Re-Enter month. It should not exceeds 12!");
        month=input.nextInt();
        }
        }

        System.out.print("Enter year of your date of birth: ");
        int year=input.nextInt();
        System.out.println();

        Calendar cal1 = Calendar.getInstance();
        Calendar cal2 = Calendar.getInstance();

        cal1.set(year, month, day);
        cal2.set(2010, 12, 9);

        long milis1 = cal1.getTimeInMillis();
        long milis2 = cal2.getTimeInMillis();

        long diff = milis2 - milis1;
        long diffDays = diff / (24 * 60 * 60 * 1000);
        System.out.println("Your Age is: " + diffDays + " days.");
            }
}

The 24 * 60 * 60 * 1000 helps in converting the milliseconds in a number of days.

Thanks

December 14, 2010 at 2:56 PM

hi; i solve it with this code ... i hope it will help others

import java.util.*; public class AgeInDays { public static void main(String[] args) throws Exception { Calendar cd= Calendar.getInstance();

        Scanner input=new Scanner(System.in);

System.out.print("Enter year of your date of birth: "); int year=input.nextInt(); if(year > cd.get(Calendar.YEAR)) {

                            System.out.print("Invalid date of birth.");
                            System.exit(0);
                        }

      System.out.print("Enter month(in number) of your date of birth: ");
         int month=input.nextInt();

            if(month < 1 || month > 12)
            {
              System.out.print("Please enter monthe between 1 to 12.");
           System.exit(0);
            }

         System.out.print("Enter day of your date of birth: ");
       int day=input.nextInt();

       if( month == 2)
       {
        System.out.print("Please enter day between 1 to 29.");
       }
        else      if(month == 1 || month == 3 || month == 5 || month == 7 ||month == 8 || month == 10 || month == 12)
                {
                       if(day > 31 || day < 0)
                        {
                         System.out.print("Please enter day between 1 to 31.");
                         System.exit(0);
                        }
               }
                  else if(month == 4 || month == 6 || month == 9 || month == 11)
                    {
                       if(day > 30 || day < 0)
                        {
                               System.out.print("Please enter day between 1 to 31.");
                               System.exit(0);
                        }
                    }
                     else{
                         if(new GregorianCalendar().isLeapYear(year))
                            {
                               if(day < 0 || day > 30)
                                {
                                 System.out.print("Please enter day between 1 to 29.");
                                 System.exit(0);
                               }
                       }
    else if(day < 0 || day > 29){
      System.out.print("Please enter day between 1 to 28.");
      System.exit(0);
    }
  }
                            System.out.println();






      int difmonth=cd.get(Calendar.MONTH)-month;
      int daymonth=difmonth*30;
      int difday=cd.get(Calendar.DAY_OF_MONTH)-day;
      int difyear=cd.get(Calendar.YEAR)-year;
      int age= (365*difyear)+difday+daymonth ;



System.out.println("Your Age is: " +age + " day");

}

}