Age calculation

/*

* AgeCalculator.java

*

* Created on June 26, 2007, 8:01 PM

*

* To change this template, choose Tools | Template Manager

* and open the template in the editor.

*/

/**

*

* @author k.rajadurai

*/

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

public class AgeCalculator

{

public AgeCalculator()

{

String dob = "04/30/1982";

String admitDate = "06/27/2007";

try

{

System.out.println(calculateAge(dob,admitDate));

}

catch(Exception e)

{

System.out.println("Error " + e.getMessage());

}

}

public static String calculateAge(String dob, String dateOfAdmission) throws ParseException

{

SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy");

Date birthDate = sdf.parse(dob);

Date admissionDate = sdf.parse(dateOfAdmission);

Calendar calendarBirth = Calendar.getInstance();

calendarBirth.setTime(birthDate);

Calendar calendarDateOfAdmission = Calendar.getInstance();

calendarDateOfAdmission.setTime(admissionDate);

int days = 0;

// Checking the Birth date is coming after the Admission Date or not. If Yes then return empty string. Otherwise Process the Following

if(calendarBirth.before(calendarDateOfAdmission))

{

//Checking the Years and Months of both Dates are same or not. If yes then Calculate Only Days. Otherwise Process the Else Pert

if(calendarDateOfAdmission.get(Calendar.YEAR) == calendarBirth.get(Calendar.YEAR) && calendarDateOfAdmission.get(Calendar.MONTH) == calendarBirth.get(Calendar.MONTH))

{

days = calendarDateOfAdmission.get(Calendar.DATE) - calendarBirth.get(Calendar.DATE);

return days + " Day(s)";

}

else

{

// calculate age as the difference in years.

int age = calendarDateOfAdmission.get(Calendar.YEAR) - calendarBirth.get(Calendar.YEAR);

int month = 0;

// if that date has not occurred yet, subtract one from age

calendarBirth.set(Calendar.YEAR, calendarDateOfAdmission.get(Calendar.YEAR));

if (calendarDateOfAdmission.before(calendarBirth))

{

age = age - 1;

month = calendarBirth.get(Calendar.MONTH) - calendarDateOfAdmission.get(Calendar.MONTH);

month = 12 - month;

// if that date has not occurred yet, subtract one from month

calendarBirth.set(Calendar.MONTH, calendarDateOfAdmission.get(Calendar.MONTH));

if (calendarDateOfAdmission.before(calendarBirth))

{

month = month - 1;

}

}

else

{

month = calendarDateOfAdmission.get(Calendar.MONTH) - calendarBirth.get(Calendar.MONTH);

// if that date has not occurred yet, subtract one from month

calendarBirth.set(Calendar.MONTH, calendarDateOfAdmission.get(Calendar.MONTH));

if (calendarDateOfAdmission.before(calendarBirth))

{

month = month - 1;

}

}

return age + " Year(s) " + month + " Month(s)";

}

}

// If the Birth Date is coming after the Admission Date then return Empty String

else

{

return "";

}

}

public static void main(String[] args)

{

new AgeCalculator();

}

}

mailrajaduraia at 2007-7-15 0:58:30 >