Java8 Date and Time API Tutorial

Java 8 Date and Time API Tutorial(Joda Time API)
#Java8 #DateandTimeAPI #JodaTimeAPI

1. Instant
===========
Instant i = Instant.now();
Sample O/P: 2020-07-31T15:02:48.635Z
Note: Z indicates the time is Coordinated Universal Time (or UTC)

Note: Instant.MIN is 1 billion years ago and Instant.MAX is Dec 31 of year 1,000,000,000

2. Duration
=============
Instant i2 = Instant.now();
Duration d = Duration.between(i, i2);

3. LocalDate
============
LocalDate currentDate = LocalDate.now();

4. Period
===========
LocalDate birthDate = LocalDate.of(1990, 11, 14);
Period p = Period.between(birthDate, currentDate);

5. LocalTime
============
LocalTime t = LocalTime.now();

6. LocalDateTime
===============
LocalDateTime dt = LocalDateTime.now();
LocalDateTime dt2 = LocalDateTime.of(1990, Month.NOVEMBER, 14, 16, 12, 15);

7. DateTimeFormatter
================
DateTimeFormatter aFormatter = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm");
LocalDateTime ldt = LocalDateTime.of(2017, Month.AUGUST, 3, 12, 30);
String formattedString = ldt.format(aFormatter);

8. Year
=========
Year y = Year.now();

9. ZoneId
=========
ZoneId z = ZoneId.systemDefault();

URL:
https://docs.oracle.com/javase/8/docs/api/java/time/ZoneId.html

10. ZonedDateTime
===============
ZoneId zUS = ZoneId.of("America/Chicago");
ZonedDateTime zdt = ZonedDateTime.now(zUS);