Java In A Nutshell: A desktop quick reference by David Flanagan

By David Flanagan

With greater than 700,000 copies bought so far, Java in a Nutshell from O'Reilly is obviously the favourite source among the legion of builders and programmers utilizing Java know-how. And now, with the discharge of the 5.0 model of Java, O'Reilly has given the publication that outlined the "in a Nutshell" classification one other amazing tune-up. during this most recent revision, readers will locate Java in a Nutshell, fifth version, does greater than simply disguise the wide alterations implicit in 5.0, the latest model of Java. it truly is passed through an entire makeover--in scope, dimension, and sort of coverage--in order to extra heavily meet the wishes of the fashionable Java programmer.

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Extra resources for Java In A Nutshell: A desktop quick reference

Sample text

Of particular note is a VM technology called just-in-time (JIT) compilation whereby Java byte codes are converted on the fly into native platform machine language, boosting execution speed for code that is run repeatedly. The Java Platform The Java platform is just as important as the Java programming language and the Java Virtual Machine. All programs written in the Java language rely on the set of predefined classes† that comprise the Java platform. Java classes are organized into related groups known as packages.

It surprises many experienced programmers to learn that Java char values are 16 bits long, but in practice this fact is totally transparent. To include a character literal in a Java program, simply place it between single quotes (apostrophes): char c = 'A'; 22 | Chapter 2: Java Syntax from the Ground Up This is the Title of the Book, eMatter Edition Copyright © 2011 O’Reilly & Associates, Inc. All rights reserved. You can, of course, use any Unicode character as a character literal, and you can use the \u Unicode escape sequence.

By avoiding the use of currency symbols in your own identifiers you don’t have to worry about collisions with automatically generated identifiers. Character. range of numbers they can represent. The next section summarizes these primitive data types. In addition to these primitive types, Java supports nonprimitive data types such as classes, interfaces, and arrays. These composite types are known as reference types, which are introduced in “Reference Types” later in this chapter. Table 2-1. 7976931348623157E+308 The boolean Type The boolean type represents truth values.

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