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

Numeric stream interfaces

As we have mentioned already, all three numeric interfaces, IntStream, LongStream, and DoubleStream, have methods similar to the methods in the Stream interface, including the methods of the Stream.Builder interface. This means that everything we have discussed so far in this chapter equally applies to any numeric stream interfaces. That is why, in this section, we will only talk about those methods that are not present in the Stream interface, as follows:

  • The range(lower,upper) and rangeClosed(lower,upper) methods in the IntStream and LongStream interfaces allow you to create a stream from the values in the specified range.
  • The boxed() and mapToObj() intermediate operations convert a numeric stream to Stream
  • The mapToInt(), mapToLong(), and mapToDouble() intermediate operations convert a numeric stream of one type to a numeric stream of another type.
  • The flatMapToInt(), flatMapToLong(), and flatMapToDouble() intermediate operations convert...