/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.time.*;
import java.text.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Date birthday = new SimpleDateFormat("dd/MM/yyyy").parse("03/09/1990");
 
		LocalDate ldirthday = birthday.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
 
		System.out.println(Period.between(ldirthday, LocalDate.now()).getYears());	
	}
}

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