compare two instants (month or other fields)
Duration duration = Duration.between(LocalDate.now().minusMonths(2).atStartOfDay().atZone(ZoneId.systemDefault()).toInstant(),Instant.now());
System.out.println(duration.toDays());
Validation for AZ phone numbers with RegEx in Java
Number bir neche formada gele biler bize. Meselen, 99451xxxxxxx 99455xxxxxxx ve s. 051xxxxxxx 055xxxxxxx ve s. 51xxxxxxx 55xxxxxxx ve s. Bu nomreleri standart formaya salmaq uchun kichik kod : public static String validate (String number){ final String prefix = "994" ; if (number.length() == 12 && number.matches( "^(994)+(50|51|55|70|77|99).*$" )) { return number ; } else if (number.length() == 10 && number.matches( "^(0)+(50|51|55|70|77|99).*$" )) { return prefix + number.substring( 1 ) ; } else if (number.length() == 9 && number.matches( "^(50|51|55|70|77|99).*$" )) { return prefix + number ; } return null; } sonda bize qayidan netice 99451xxxxxxx ve ya 99455xxxxxxx sheklinde olacaq. Eger null qayidarsa, bu methodun cagrildigi yerde uygun helli etmek olar.
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