import java.util.*;
import java.io.*;
public class AgeCalculation{
public static void main(String[] args) throws IOException{
int day = 1, month = 0, year = 1, ageYears, ageMonths, ageDays;
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
Calendar cd = Calendar.getInstance();
try{
System.out.print("Enter year of your date of birth : ");
year = Integer.parseInt(in.readLine());
if(year > cd.get(Calendar.YEAR)){
System.out.print("Invalid date of birth.");
System.exit(0);
}
System.out.print("Enter month of your date of birth : ");
month = Integer.parseInt(in.readLine());
if(month < 1 || month > 12){
System.out.print("Please enter monthe between 1 to 12.");
System.exit(0);
}
else{
month--;
if(year == cd.get(Calendar.YEAR)){
if(month > cd.get(Calendar.MONTH)){
System.out.print("Invalid month!");
System.exit(0);
}
}
}
System.out.print("Enter day of your date of birth : ");
day = Integer.parseInt(in.readLine());
if(month == 0 || month == 2 || month == 4 || month == 6 || month == 7 ||
month == 9 || month == 11){
if(day > 31 || day < 1){
System.out.print("Please enter day between 1 to 31.");
System.exit(0);
}
}
else if(month == 3 || month == 5 || month == 8 || month == 10){
if(day > 30 || day < 1){
System.out.print("Please enter day between 1 to 30.");
System.exit(0);
}
}
else{
if(new GregorianCalendar().isLeapYear(year)){
if(day < 1 || day > 29){
System.out.print("Please enter day between 1 to 29.");
System.exit(0);
}
}
else if(day < 1 || day > 28){
System.out.print("Please enter day between 1 to 28.");
System.exit(0);
}
}
if(year == cd.get(Calendar.YEAR)){
if(month == cd.get(Calendar.MONTH)){
if(day > cd.get(Calendar.DAY_OF_MONTH)){
System.out.print("Invalid date!");
System.exit(0);
}
}
}
}
catch(NumberFormatException ne){
System.out.print(ne.getMessage() + " is not a legal entry!");
System.out.print("Please enter number.");
System.exit(0);
}
Calendar bd = new GregorianCalendar(year, month, day);
ageYears = cd.get(Calendar.YEAR) - bd.get(Calendar.YEAR);
if(cd.before(new GregorianCalendar(cd.get(Calendar.YEAR), month, day))){
ageYears--;
ageMonths = (12 - (bd.get(Calendar.MONTH) + 1)) + (bd.get(Calendar.MONTH));
if(day > cd.get(Calendar.DAY_OF_MONTH)){
ageDays = day - cd.get(Calendar.DAY_OF_MONTH);
}
else if(day < cd.get(Calendar.DAY_OF_MONTH)){
ageDays = cd.get(Calendar.DAY_OF_MONTH) - day;
}
else{
ageDays = 0;
}
}
else if(cd.after(new GregorianCalendar(cd.get(Calendar.YEAR), month, day))){
ageMonths = (cd.get(Calendar.MONTH) - (bd.get(Calendar.MONTH)));
if(day > cd.get(Calendar.DAY_OF_MONTH))
ageDays = day - cd.get(Calendar.DAY_OF_MONTH) - day;
else if(day < cd.get(Calendar.DAY_OF_MONTH)){
ageDays = cd.get(Calendar.DAY_OF_MONTH) - day;
}
else
ageDays = 0;
}
else{
ageYears = cd.get(Calendar.YEAR) - bd.get(Calendar.YEAR);
ageMonths = 0;
ageDays = 0;
}
System.out.print("Age of the person : " + ageYears + " year, " + ageMonths +
" months and " + ageDays + " days.");
}
}
import java.util.Calendar;
import java.text.SimpleDateFormat;
public class age {
private float year;
private float age;
private float month;
private float yearx;
private float monthx;
private float dayx;
private float day;
private float mon;
private String yearFormat = "yyyy";
private String monthFormat = "MM";
private String dayFormat = "dd";
public age (int d ,int m, int y){
float curYear = Integer.parseInt(curDate(yearFormat));
float curMonth = Float.parseFloat(curDate(monthFormat));
float curDay = Float.parseFloat(curDate(dayFormat));
year = y;
month = m;
day = d;
yearx = curYear - year;
monthx = curMonth - month;
dayx = curDay - day;
age = yearx + monthx/12;
if( monthx < 0) {
mon = 12-(Math.abs(monthx));
}
else {
mon = Math.abs(monthx);
}
}
static String curDate(String format) {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(cal.getTime());
}
public String toString () {
return String.format("Age: %.0fyears %.0fmonths %.0f%s", Math.floor(age) , Math.abs((dayx>=0? mon:mon-1)) , (dayx>=0? dayx:30+dayx), ((Math.abs(dayx))>1? "days":"day") );
}
}
/**
* Computes the duration between an input date and date today and returns
* the value in years, months and days
*
* @param month
* - input month
* @param day
* - input day
* @param year
* - input year
* @return duration in years, months and days
*/
public String getDuration(int month, int day, int year) throws Exception {
/* input calendar date */
month--; // following the 0-based rule
Calendar cal = new GregorianCalendar(year, month, day);
/* date today */
java.util.Date today = new java.util.Date();
/* year now */
SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");
int intYear = Integer.parseInt(sdfYear.format(today));
/* month now */
SimpleDateFormat sdfMonth = new SimpleDateFormat("MM");
int intMonth = Integer.parseInt(sdfMonth.format(today));
intMonth--; // following the 0-based rule
/* day now */
SimpleDateFormat sdfDay = new SimpleDateFormat("dd");
int intDay = Integer.parseInt(sdfDay.format(today));
/* calendar date now */
Calendar now = new GregorianCalendar(intYear, intMonth, intDay);
/* years duration */
int yyyy = intYear - year;
/* array of days in 12 months */
int[] months = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
/*
* an indicator if given date has already occurred. (-1) - if given date
* is greater than the current date; 0 - if given date has not yet
* occurred or if it's equal to the current date.
*/
int factor = 0;
int mm = 0; // month duration
int dd = 0; // day duration
/* determine if given date is greater than or equal to the current date */
if ((month > intMonth) || (month == intMonth && day > intDay)) {
factor = -1;
yyyy += factor;
}
/* throw if any of the following exceptions occur */
if (month > 12) {
throw new Exception("Invalid input month");
} else if (day > months[month]) {
throw new Exception("Invalid input day");
} else if (yyyy < 0) {
throw new Exception("Invalid input date");
}
/*
* if the given date has already passed or if it's equal to the current
* date
*/
if (factor == 0) {
// compute for days in between the given and the current date
dd = now.get(Calendar.DAY_OF_YEAR) - cal.get(Calendar.DAY_OF_YEAR);
/* determine if the current year is a leap year */
if ((intYear % 4) == 0) {
months[1]++; // increment the days in February by 1
}
/*
* compute for day duration and month duration between the given
* date and the given day of the current month
*/
for (int i = month; i <= intMonth; i++) {
if (dd >= months[i]) {
dd -= months[i];
mm++;
}
}
/*
* if computed month duration is more than 12, finalize values for
* year and month duration
*/
if (mm >= 12) {
yyyy += (mm / 12);
mm %= 12;
}
} else { // if the given date is greater than the current date
intYear--; // derive previous year
/* set Calendar date for December 31 of the previous year */
Calendar prev = new GregorianCalendar(intYear, 11, 31);
/*
* compute the days in between the given date last year and the
* current date
*/
dd = (prev.get(Calendar.DAY_OF_YEAR) - cal
.get(Calendar.DAY_OF_YEAR))
+ now.get(Calendar.DAY_OF_YEAR);
/* determine if previous year is a leap year */
if ((intYear % 4) == 0) {
months[1]++; // increment the days in February by 1
}
/*
* compute for day duration and month duration between the given
* date and the given day in December of the previous year
*/
for (int i = month; i <= 11; i++) {
if (dd >= months[i]) {
dd -= months[i];
mm++;
}
}
intYear++; // set the value back to the current year
/* determine if current year is a leap year */
if ((intYear % 4) == 0) {
months[1]++; // increment the days in February by 1
}
/*
* compute for day duration and month duration between the given day
* in January of the current year and the current date
*/
for (int i = 0; i <= intMonth; i++) {
if (dd >= months[i]) {
dd -= months[i];
mm++;
}
}
/*
* if computed month duration is more than 12, finalize values for
* year and month duration
*/
if (mm >= 12) {
yyyy += (mm / 12);
mm %= 12;
}
}
/* computed duration in years, months and days */
return yyyy + " Year(s), " + mm + " Month(s), and " + dd + " Day(s) ";
}
/**
* Another age calculater which calcultes the age in years (on the minute)
* Just a quickly made (5 min) piece of code for who ever is interested
**/
// Initialize a birth date calendar and set the birth date
Calendar birthDateCalendar = Calendar.getInstance();
birthDateCalendar.setTimeInMillis((new SimpleDateFormat("dd-MM-yyyy HH:mm").parse("13-12-1979 14:39").getTime()));
// Initialize the age with -1 : stating a future birth date
int ageInYears = -1;
// Add a year until the birthdate equals now
for(Calendar now = Calendar.getInstance(); birthDateCalendar.compareTo(now) < 0 ; birthDateCalendar.add(Calendar.YEAR, 1))
{
ageInYears += 1;
}
// Here's the age in years
System.err.println(ageInYears);
Comment