May 2020
Beginner
267 pages
7h 37m
English
Content preview from 97 Things Every Java Programmer Should Know
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 25. Follow the Boring Standards
Adam Bien
At the beginning of the Java age, there were dozens of incompatible application servers on the market, and the server vendors followed completely different paradigms. Some servers were even partially implemented in native languages like C++. Understanding multiple servers was hard, and porting an application from one server to another was nearly impossible.
APIs like JDBC (introduced with JDK 1.1), JNDI (introduced with JDK 1.3), JMS, JPA, or Servlets abstracted, simplified, and unified already established products. EJBs and CDI made the deployment and programming models vendor agnostic. J2EE, later Java EE and now Jakarta EE, and MicroProfile defined a minimal set of APIs an application server had to implement. With the advent of J2EE, a developer only had to know a set of J2EE APIs to develop and deploy an application.
Although the servers evolved, the J2EE and Java EE APIs remained compatible. You never had to migrate your application to run on a newer release of the application server. Even upgrading to a higher Java EE version was painless. You only had to re-test the application without even recompiling it. Only if you wanted to take advantage of newer APIs did you have to refactor the application. With the introduction of J2EE, developers could master multiple application servers without delving too deep into their specifics. ...
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.