Age_Calculator.java

//the program works on Java 8 and later versions 
import java.time.LocalDate; 
import java.time.Period; 
import java.util.Scanner; 
public class AgeCalculatorExample1 
{ 
public static void main(String args[]) 
{ 
System.out.print("Enter date of birth in YYYY-MM-DD format: "); 
Scanner scanner = new Scanner(System.in); 
//reads the date of birth from the user 
String input = scanner.nextLine(); 
scanner.close(); 
//the parse() method obtains an instance of LocalDate from a text string such as 1992-08-11 
LocalDate dob = LocalDate.parse(input); 
//prints the age 
System.out.println("You are " + calculateAge(dob)+" years old."); 
} 
//the method calculates the age 
public static int calculateAge(LocalDate dob) 
{ 
//creating an instance of the LocalDate class and invoking the now() method 
//now() method obtains the current date from the system clock in the default time zone 
LocalDate curDate = LocalDate.now(); 
//calculates the amount of time between two dates and returns the years 
if ((dob != null) && (curDate != null)) 
{ 
return Period.between(dob, curDate).getYears(); 
} 
else 
{ 
return 0; 
} 
} 
}