March 2021
Intermediate to advanced
768 pages
15h 31m
English
Content preview from Job Ready Java
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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.
Lesson 1Installing Java
Welcome to the world of learning Java. In this first lesson, we will set up everything needed to write Java programs. We will then write our first program together called “Hello, World!”
It is important to know that, by itself, Java code doesn't do anything. It is just text. To make it useful, we need to install the Java Development Kit (JDK). The JDK contains the compiler and other tools needed to create executable Java programs. After the JDK is installed, we will check the configuration by creating, compiling, and running the obligatory “Hello, World!” program.
THE JAVA UNIVERSE
Before we get into downloading and installing the Java tools and writing our first program, let's first take a look at the bigger picture: the Java universe, if you will. A little history will help to make sense of where Java is today.
The development of the Java language was led by James Gosling at Sun Microsystems. The initial development started in the early 1990s, and the language was originally called Oak. The first official ...
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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.