June 2012
Intermediate to advanced
288 pages
6h 48m
English
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Identifiers
An identifier is a word that you make up to associate a name with a Java programming element, such as a variable, field, parameter, class, or method.
Here are the rules for creating identifiers:
Identifiers are case-sensitive. As a result, SalesTax and salesTax are distinct identifiers.
Identifiers can be made up of uppercase or lowercase letters, numerals, underscore characters (_), and dollar signs ($). Thus, you can have identifier names such as Port1, SalesTax$, and Total_Sales.
All identifiers must begin with a letter. Thus, a15 is a valid identifier, but 13Unlucky isn’t (because it begins with a numeral).
An identifier can’t be the same as any of the Java keywords listed earlier in this part. Thus, you can’t create a variable named for or a class named public.
The Java language specification recommends that you avoid using dollar signs in names you create because code ...
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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.