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LocalDate date1 = LocalDate.of(2010,3,1);
        
Period period = Period.between(date1, LocalDate.now());
System.out.println(period.getYears());


LocalDateTime dateTime = LocalDateTime.now();

dateTime = dateTime.withMonth(10).withDayOfMonth(16).withHour(16);
dateTime = dateTime.plusYears(3);
dateTime = dateTime.plus(3, ChronoUnit.YEARS);

Duration duration = Duration.between(dateTime, LocalDateTime.now());
System.out.println(duration.toDays());