Periodo entre fechas

import java.time.LocalDate;
import java.time.Period;

public class MyClass {

  public static void main(String[] args) {

      LocalDate date1 = LocalDate.of(2003, 7, 25);
      System.out.println("Is 6 months older? " + isOlderThanYears(date1, 18));

      LocalDate date2 = LocalDate.of(2020, 9, 26);
      System.out.println("Is 6 months older? " + isOlderThanYears(date2, 18));

      LocalDate date3 = LocalDate.of(2020, 10, 26);
      System.out.println("Is 6 months older? " + isOlderThanYears(date3, 18));

      LocalDate date4 = LocalDate.of(2001, 10, 26);
      System.out.println("Is 6 months older? " + isOlderThanYears(date4, 18));

  }

  static boolean isOlderThanMonths(final LocalDate date, final int months) {

      boolean result = false;

      LocalDate now = LocalDate.now();
      // period from now to date
      Period period = Period.between(now, date);

      System.out.println("\nNow: " + now);
      System.out.println("Date: " + date);
      System.out.printf("%d years, %d months, %d days%n",
              period.getYears(), period.getMonths(), period.getDays());

      if (period.getYears() < 0) {
          // if year is negative, 100% older than 6 months
          result = true;
      } else if (period.getYears() == 0) {
          if (period.getMonths() <= -months) {
              result = true;
          }
      }

      return result;

  }

  static boolean isOlderThanYears(final LocalDate date, final int years) {
      boolean result = false;
      LocalDate now = LocalDate.now();
      // period from now to date
      Period period = Period.between(date, now);
      System.out.println("\nNow: " + now);
      System.out.println("Date: " + date);
      System.out.printf("%d years, %d months, %d days%n", period.getYears(), period.getMonths(), period.getDays());
      return period.getYears() >= years;
  }

}