Book Image

Learn Java 17 Programming - Second Edition

By : Nick Samoylov
4 (1)
Book Image

Learn Java 17 Programming - Second Edition

4 (1)
By: Nick Samoylov

Overview of this book

Java is one of the most preferred languages among developers. It is used in everything right from smartphones and game consoles to even supercomputers, and its new features simply add to the richness of the language. This book on Java programming begins by helping you learn how to install the Java Development Kit. You’ll then focus on understanding object-oriented programming (OOP), with exclusive insights into concepts such as abstraction, encapsulation, inheritance, and polymorphism, which will help you when programming for real-world apps. Next, you’ll cover fundamental programming structures of Java such as data structures and algorithms that will serve as the building blocks for your apps with the help of sample programs and practice examples. You’ll also delve into core programming topics that will assist you with error handling, debugging, and testing your apps. As you progress, you’ll move on to advanced topics such as Java libraries, database management, and network programming and also build a sample project to help you understand the applications of these concepts. By the end of this Java book, you’ll not only have become well-versed with Java 17 but also gained a perspective into the future of this language and have the skills to code efficiently with best practices.
Table of Contents (23 chapters)
1
Part 1: Overview of Java Programming
5
Part 2: Building Blocks of Java
15
Part 3: Advanced Java

Streams as a source of data and operations

Lambda expressions, described and demonstrated in the previous chapter, together with functional interfaces add a powerful functional programming capability to Java. They allow passing behavior (functions) as parameters to libraries optimized for the performance of data processing. This way, an application programmer can concentrate on the business aspects of a developed system, leaving the performance aspects to the specialists – the authors of the library. One example of such a library is java.util.stream, which is going to be the focus of this chapter.

In Chapter 5, Strings, Input/Output, and Files, we talked about I/O streams as a source of data, but beyond that, they are not of much help for further processing of data. Also, they are byte- or character-based, not object-based. You can create a stream of objects only after objects have been programmatically created and serialized first. The I/O streams are just connections to...