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)

Managing random numbers

Generating a truly random number is a big topic that does not belong to this book. But for the vast majority of practical purposes, the pseudo-random number generators provided by Java are good enough, and that is what we are going to discuss in this section.

There are two primary ways to generate a random number in Java Standard Library:

  • The java.lang.Math.random() method
  • The java.util.Random class

There is also the java.security.SecureRandom class, which provides a cryptographically strong random number generator, but it is outside the scope of an introductory course.

Method java.lang.Math.random()

The static method double random() of the class Math returns a double type value greater than or equal...