juanpabloprado

<select class="custom-select form-control" id="exp-year">
  <option value="2019">2019</option>
  <option value="2020">2020</option>
  <option value="2020">2021</option>
  <option value="2020">2022</option>
  <option value="2023">2023</option>
</select>  

juanpabloprado

jshell> LocalTime lt1 = LocalTime.now();
lt1 ==> 21:22:05.322393

jshell> LocalTime lt2 = LocalTime.parse("12:00");
lt2 ==> 12:00

jshell> LocalTime lt3 = LocalTime.of(12, 0); // Hour, minutes
lt3 ==> 12:00

jshell> LocalTime lt4 = LocalTime.of(12, 0, 1); // Hour, minutes, seconds

juanpabloprado

jshell> LocalDate ld1 = LocalDate.now();
ld1 ==> 2019-04-23

jshell> LocalDate ld2 = LocalDate.parse("2019-01-01"); // Date
ld2 ==> 2019-01-01

jshell> LocalDate ld3 = LocalDate.of(2019, 1, 1); // Year, Month, Day
ld3 ==> 2019-01-01

jshell> LocalDate ld4 = LocalDate.of(2019, Month.JANUARY, 1); // Year, Month, Day

juanpabloprado

jshell> LocalDateTime ldt1 = LocalDateTime.now();
ldt1 ==> 2019-04-23T21:41:59.084165

jshell> LocalDateTime ldt2 = LocalDateTime.parse("2019-01-01T12:00:00");
ldt2 ==> 2019-01-01T12:00

jshell> LocalDateTime ldt3 = LocalDateTime.of(2019, 1, 1, 12, 0);
ldt3 ==> 2019-01-01T12:00

jshell> LocalDateTime ldt4 = LocalDateTime.of(2019, Month.JANUARY, 1, 12, 0);

juanpabloprado

jshell> import java.util.Calendar;

jshell> import java.time.Instant;

jshell> Calendar calendar = Calendar.getInstance();
calendar ==> java.util.GregorianCalendar[time=1556074159985,ar ... 600000,DST_OFFSET=3600000]

jshell> Instant instant = calendar.toInstant();
instant ==> 2019-04-24T02:49:19.985Z

juanpabloprado

jshell> LocalDate ld = LocalDate.now();
ld ==> 2019-04-23

jshell> // All plus methods

jshell> ld = ld.plusYears(1).plusMonths(12).plusWeeks(52).plusDays(365);
ld ==> 2023-04-22

jshell> // All minus methods

juanpabloprado

jshell> Period P1 = Period.ofYears(1); // 1 year
P1 ==> P1Y

jshell> Period P2 = Period.ofMonths(12) // 1 year
P2 ==> P12M

jshell> Period P3 = Period.ofWeeks(52) // 1 year
P3 ==> P364D

jshell> Period P4 = Period.ofDays(366) // 1 year (leap)

juanpabloprado

jshell> Period period = Period.of(5, 2, 1);
period ==> P5Y2M1D

jshell> period = period.plusYears(10);
period ==> P15Y2M1D

jshell> period = period.plusMonths(10);
period ==> P15Y12M1D

jshell> period = period.plusDays(15);

juanpabloprado

jshell> Period p1 = Period.parse("P10D").minusDays(10);
p1 ==> P0D

jshell> "Is zero: " + p1.isZero();
$24 ==> "Is zero: true"

jshell> // Period equals negative value

jshell> Period p2 = Period.parse("P2019M");
p2 ==> P2019M

juanpabloprado

shell> String WAR_OF_1812_START_DATE = "1812-06-18";
WAR_OF_1812_START_DATE ==> "1812-06-18"

jshell> String WAR_OF_1812_END_DATE = "1815-02-18";
WAR_OF_1812_END_DATE ==> "1815-02-18"

jshell> import java.time.LocalDate;

jshell> LocalDate warBegins = LocalDate.parse(WAR_OF_1812_START_DATE);
warBegins ==> 1812-06-18