DATE & TIME API: Introduction Java Date Time API | Java 8 Version

DATE & TIME API: Introduction Java Date Time API

Why do we need new Java Date Time API?

4. All the Date classes are mutable, so they are not thread-safe. It’s one of the biggest problems with Java Date and Calendar classes.

Java 8 Date Time Design Principles:
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Immutability: All the classes in the new Date-Time API are immutable and good for multithreaded environments.

Separation of Concerns: The new API separates clearly between human-readable date time and machine time (Unix timestamp). It defines separate classes for Date, Time, DateTime, Timestamp, Timezone, etc.

Clarity: The methods are clearly defined and perform the same action in all the classes. For example, to get the current instance we have now() method. There are format() and parse() methods defined in all these classes rather than having a separate class for them.

All the classes use Factory Pattern and Strategy Pattern for better handling. Once you have used the methods in one of the classes, working with other classes won’t be hard.

Utility operations: All the new Date-Time API classes come with methods to perform common tasks, such as plus, minus, format, parsing, getting the separate part in date/time, etc.

Extendable: The new Date Time API works on the ISO-8601 calendar system but we can use it with other non-ISO calendars as well.

Date Time API Packages:
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