Here are a few Java 8 examples to parse date with LocalDateTime. First, find the DateTimeFormatter pattern that matches the date format, second, parse it with LocalDateTime.parse
In Java 8, we can use Instant.ofEpochMilli().atZone() to convert the epoch time in milliseconds back to LocalDate or LocalDateTime
In Java 8, we can use Period, Duration or ChronoUnit to calculate the difference between two LocalDate or LocaldateTime: 1 – Period to calculate the difference between two LocalDate, 2 – Duration to calculate the difference between two LocalDateTime, 3 – ChronoUnit for everything.
This article shows few examples to compare two dates in Java. Updated with Java 8 examples. For the legacy java.util.Date, we can use compareTo, before(), after() and equals() to compare two dates. For the legacy java.util.Calendar, the Calendar works the same way as java.util.Date. And The Calendar contains the similar compareTo, before(), after() and equals() to compare two calender. For the new Java 8 java.time.* classes, all contains similar compareTo, isBefore(), isAfter() and isEqual() to compare two dates, and it works the same way.
Few examples to convert classic Date to Java Time dates and vice versa: Convert java.util.Date to java.time.LocalDate, Convert java.util.Date to java.time.LocalDateTime, Convert java.util.Date to java.time.ZonedDateTime. The java.util.Date has no concept of time zone, and only represents the number of seconds passed since the Unix epoch time. The new Java 8 java.time.Instant is the equivalent class to the classic java.util.Date. The idea of the date conversion is to convert to an instant with a time zone.
In this tutorial, we will show you how to get the current date time from the new Java 8 java.time.* like Localdate, LocalTime, LocalDateTime, ZonedDateTime, Instant and also the legacy date time APIs like Date and Calendar. In summary, For new Java 8 java.time.* APIs , we can use .now() to get the current date-time and format it with DateTimeFormatter. For legacy date-time APIs, we can use new Date() and Calendar.getInstance() to get the current date-time and format it with SimpleDateFormat.
Here are a few Java examples of converting a String to the new Java 8 Date API – java.time.LocalDate. The key is understand the DateTimeFormatter patterns. If the date is unable to parse, it will throw DateTimeParseException.