July 2017
Intermediate to advanced
466 pages
11h 24m
English
Content preview from Java 9 Programming Blueprints
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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.
REPL
One change that seems to excite a lot of people isn't a language change at all. It's the addition of a REPL (Read-Eval-Print-Loop), a fancy term for a language shell. In fact, the command for this new tool is jshell. This tool allows us to type or paste in Java code and get immediate feedback. For example, if we wanted to experiment with the Streams API discussed in the preceding section, we could do something like this:
$ jshell | Welcome to JShell -- Version 9-ea | For an introduction type: /help intro jshell> List<String> names = Arrays.asList(new String[]{"Tom", "Bill", "Xavier", "Sarah", "Adam"}); names ==> [Tom, Bill, Xavier, Sarah, Adam] jshell> names.stream().sorted().forEach(System.out::println); Adam Bill Sarah Tom Xavier ...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,
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