calculating the age from current date

[karthickkuchanur]

Hai sir,
i assigned to calculate the age from current date ,i have the date of birth of employee from that i have to calculate the age dynamically,
i refer to google it was confusing me .please give some idea to do sir

[hirak1984]

Hai sir,
i assigned to calculate the age from current date ,i have the date of birth of employee from that i have to calculate the age dynamically,
i refer to google it was confusing me .please give some idea to do sir

so what is the problem?
are you finding it difficult to calculate? or to write the code?
first learn the calculation.
tell us how would you calculate if the question was there in your mathematics class? post the formula.

[r035198x]

Hai sir,
i assigned to calculate the age from current date ,i have the date of birth of employee from that i have to calculate the age dynamically,
i refer to google it was confusing me .please give some idea to do sir

Have a look at java.util.GregorianCalendar, try some code, and post again if you still have problems.

[karthickkuchanur]

Have a look at java.util.GregorianCalendar, try some code, and post again if you still have problems.

ok sir i will try tot do that

[karthickkuchanur]

so what is the problem?
are you finding it difficult to calculate? or to write the code?
first learn the calculation.
tell us how would you calculate if the question was there in your mathematics class? post the formula.

to develope the code i have the set code in google but i cant able to study that

[r035198x]

to develope the code i have the set code in google but i cant able to study that

What do you mean by that?

[karthickkuchanur]

What do you mean by that?

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.");
  }
}
 

this the code i have but i want to simply by this please help me

[r035198x]

What did you say the problem is?
Does the code compile sucessfully?
Does it give the correct results?

[hirak1984]

 
    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.");
  }
}
 

this the code i have but i want to simply by this please help me

Look.
first of all dont randomly pick up codes from the net. The code you posted is written by a professional, abiding by all the standards of code writing.
But not so affluent as you are, it is bound to look puzzling to you.
You need not take any user input at this point. Hard code a date in your main().
and try to calculated age using it.
use the formula they have used in the above part of your code.
tell us what errors you got in doing this.

[karthickkuchanur]

Look.
first of all dont randomly pick up codes from the net. The code you posted is written by a professional, abiding by all the standards of code writing.
But not so affluent as you are, it is bound to look puzzling to you.
You need not take any user input at this point. Hard code a date in your main().
and try to calculated age using it.
use the formula they have used in the above part of your code.
tell us what errors you got in doing this.

ok sir i will try to do my best

[JosAH]

@OP: maybe just for the fun of it (or a better understanding of dates), google for
Zeller's congruence.

kind regards,

Jos

[hirak1984]

@OP: maybe just for the fun of it (or a better understanding of dates), google for
Zeller's congruence.

kind regards,

Jos

wow!!!
that was gr8 man. really interesting.
thnx JosAH

[poloolop]

Guys, here is the easiest code of age calculator...

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") );
  }
 
}

[Ramil Grayda]

/**
     * 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) ";
    }

[Marco W]

/**
* 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);
 

[dilipmanohar]

you can check this tutorial How to calculate age in java?. I am sure you will find it helpful.