How to convert person mm/dd/yyyy D.O.B into actual age. Selenium, Java

Question

I want to convert date of birth into age. This is my code.

String patientDOB = driver.findElement(id("patient_profile_widget_form_birthday")).getAttribute("value");

I'm getting date as: 03/01/1961

How could I convert this into age? I want output like => 57 Years

Any idea? :)

Ehm, get the current date and then do a subtraction on both dates probably? — UninformedUser, Dec 05 '18 at 11:44
convert this into age from `03/01/1961` to `57 Years` would be core language specific task. Why is `Selenium` tagged here? Am I missing something? — undetected Selenium, Dec 05 '18 at 11:45
(1) Parse your string into a `LocalDate` (2) Calculate years between that date and today. For each of the two subtasks your search engine will give you many hits. — Ole V.V., Dec 05 '18 at 12:12

score 1 · Answer 1 · answered Dec 05 '18 at 11:49

1

using java 8

public int calculateAge(
  LocalDate birthDate) {
    // validate inputs ...
    return Period.between(birthDate, LocalDate.now());
}

answered Dec 05 '18 at 11:49

Daan

373
2
9

score 0 · Answer 2 · answered Dec 05 '18 at 11:54

private static final DateFormat FORMATTER = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss z", Locale.US);
String patientDOB = driver.findElement(id("patient_profile_widget_form_birthday")).getAttribute("value");

Date dateOfBirth = getDateFromString(patientDOB);
public Date getDateFromString(final String patientDOB) {
    try {
        return FORMATTER.parse(param);
    } catch (ParseException e) {
        throw new Exception("ParseException occurred while parsing date ", e);
    }
}

public static int getAge(Date dateOfBirth) {
Calendar today = Calendar.getInstance();
Calendar birthDate = Calendar.getInstance();
birthDate.setTime(dateOfBirth);
if (birthDate.after(today)) {
    throw new IllegalArgumentException("You don't exist yet");
}
int todayYear = today.get(Calendar.YEAR);
int birthDateYear = birthDate.get(Calendar.YEAR);
int todayDayOfYear = today.get(Calendar.DAY_OF_YEAR);
int birthDateDayOfYear = birthDate.get(Calendar.DAY_OF_YEAR);
int todayMonth = today.get(Calendar.MONTH);
int birthDateMonth = birthDate.get(Calendar.MONTH);
int todayDayOfMonth = today.get(Calendar.DAY_OF_MONTH);
int birthDateDayOfMonth = birthDate.get(Calendar.DAY_OF_MONTH);
int age = todayYear - birthDateYear;

// If birth date is greater than todays date (after 2 days adjustment of leap year) then decrement age one year
if ((birthDateDayOfYear - todayDayOfYear > 3) || (birthDateMonth > todayMonth)){
    age--;

// If birth date and todays date are of same month and birth day of month is greater than todays day of month then decrement age
} else if ((birthDateMonth == todayMonth) && (birthDateDayOfMonth > todayDayOfMonth)){
    age--;
}
return age;

}

Please don’t teach the young ones to use the long outdated and notoriously troublesome `SimpleDateFormat` class. At least not as the first option. And not without any reservation. Today we have so much better in [`java.time`, the modern Java date and time API](https://docs.oracle.com/javase/tutorial/datetime/) and its `DateTimeFormatter`. — Ole V.V., Dec 05 '18 at 12:09

score -2 · Answer 3 · answered Dec 05 '18 at 11:45

-2

Create a wrapper method that get you string as argument,

use:

 String[] parts = string.split("/");

and select the 3rd item of the list.

then you just have to use:

int year = Calendar.getInstance().get(Calendar.YEAR);

to get your year. Then you just convert your year string into an int and substract them

answered Dec 05 '18 at 11:45

Aurele Collinet

138
1
16

2

that's not correct and an ugly way...and not taking into account day and month is probably a bad idea, as those clearly matter when computing the age. Java has parsers for date string, Java provides subtraction for date objects, so ... – UninformedUser Dec 05 '18 at 11:47
answer him yourself then ? – Aurele Collinet Dec 05 '18 at 11:51
no, I'm dumb and have no good coding experience in Java – UninformedUser Dec 05 '18 at 13:13
why would you downvote a working solution if you cant propose a better one – Aurele Collinet Dec 05 '18 at 13:40

How to convert person mm/dd/yyyy D.O.B into actual age. Selenium, Java

3 Answers3