July 2017
Intermediate to advanced
466 pages
11h 24m
English
Content preview from Java 9 Programming Blueprints
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Value types
The goal of this effort is to update the Java Virtual Machine, and, if possible, the Java language, to support small, immutable, identity-less value types. Currently, if you instantiate a new Object, it is given an identifier by the JVM, which allows the variable instance to be referenced.
For example, if you create a new integer, new Integer(42), a variable with the identity of java.lang.Integer@68f29546, but the value of 42, the value of this variable will never change, and that's all we, as developers, typically care about. However, the JVM doesn't really know that, so it has to maintain the identity of the variable, with all of the overhead that entails. According to Goetz, that means every instance of this object will require ...
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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.
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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.