August 2017
Intermediate to advanced
319 pages
6h 50m
English
Content preview from Modern Java Recipes
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 8. The java.time Package
Friends don’t let friends use java.util.Date.
Tim Yates
From the beginning of the language, the standard edition library has included two classes for handling dates and times: java.util.Date and java.util.Calendar. The former is a classic example of how not to design a class. If you check the public API, practically all the methods are deprecated, and have been since Java 1.1 (roughly 1997). The deprecations recommend using Calendar instead, which isn’t much fun either.
Both predate1 the addition of enums into the language, so they use integer constants for fields like months. Both are mutable, and therefore not thread safe. To handle some issues, the library later added the java.sql.Date class as a subclass of the version in java.util, but that didn’t really address the fundamental problems.
Finally, in Java SE 8, a completely new package has been added that addressed everything. The java.time package is based on the Joda-Time library, which has been used as a free, open source alternative for years. In fact, the designers of Joda-Time helped design and build the new package, and recommend that future development take advantage of it.
The new package was developed under JSR-310: Date and Time API, and supports the ISO 8601 standard. It correctly adjusts for leap years and daylight savings rules in individual regions.
This chapter contains recipes that illustrate the usefulness of the java.time package. Hopefully they will address basic questions ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.