Book Image

Introduction to Programming

By : Nick Samoylov
Book Image

Introduction to Programming

By: Nick Samoylov

Overview of this book

Have you ever thought about making your computer do what you want it to do? Do you want to learn to program, but just don't know where to start? Instead of guiding you in the right direction, have other learning resources got you confused with over-explanations? Don't worry. Look no further. Introduction to Programming is here to help. Written by an industry expert who understands the challenges faced by those from a non-programming background, this book takes a gentle, hand-holding approach to introducing you to the world of programming. Beginning with an introduction to what programming is, you'll go on to learn about languages, their syntax, and development environments. With plenty of examples for you to code alongside reading, the book's practical approach will help you to grasp everything it has to offer. More importantly, you'll understand several aspects of application development. As a result, you'll have your very own application running by the end of the book. To help you comprehensively understand Java programming, there are exercises at the end of each chapter to keep things interesting and encourage you to add your own personal touch to the code and, ultimately, your application.
Table of Contents (21 chapters)

Final variable, final method, or final class

The use of the keyword final and its effects depend on the context. It can make a variable value unchangeable, a method not overridable, or a class not extendable. We will briefly discuss each of this situations.

Final variable

If a keyword final is placed in front of a variable declaration, the value of this variable once assigned (the variable is initialized) cannot be changed. The way a variable can be initialized depends on how the variable is used. There are three kinds of variable usage, and each has different initialization rules:

  • A local variable is a variable declared in the block of code; it can be initialized using an assignment in the same statement with the declaration...