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)

Lambda expressions

The examples in the previous section (that used anonymous classes for the implementation of functional interfaces) looked bulky and felt excessively verbose. For one, there was no need to repeat the interface name, because we had declared it already as the type for the object reference. And, second, in the case of a functional interface that had only one abstract method, there is no need to specify the method name that has to be implemented. The compiler and Java runtime can figure it out. All we need is to provide the new functionality. Lambda expressions were introduced for exactly this purpose.

What is a lambda expression?

The term lambda comes from lambda calculus—a universal model of computation...