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)

What is importing?

Importing allows us to specify a fully qualified class or interface name only once at the beginning of the .java file, before the class or interface declaration. The format of an import statement is as follows:

import <package>.<class or interface name>;

For example, look at the following:

import com.packt.javapath.ch04demo.MyApplication;

From now on, this class can be referred to in the code by its name, MyApplication, only. It is also possible to import all the classes or interfaces of a package using the wildcard character (*):

import com.packt.javapath.ch04demo.*;

Notice that the preceding import statement imports classes and interfaces of the subpackages of the com.packt.javapath.ch04demo package. If needed, each subpackage has to be imported separately.

But, before we continue, let's talk about the .java file structure and packages.