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

Reserved and restricted keywords

The keywords are the words that have particular meaning for a compiler and cannot be used as identifiers. As of Java 17, there are 52 reserved keywords, 5 reserved identifiers, 3 reserved words, and 10 restricted keywords. The reserved keywords cannot be used as identifiers anywhere in the Java code, while the restricted keywords cannot be used as identifiers only in the context of a module declaration.

Reserved keywords

The following is a list of all Java-reserved keywords:

By now, you should feel at home with most of the preceding keywords. By way of an exercise, you can go through the list and check how many of them you remember. Up until now, we have not discussed the following eight keywords:

  • const and goto are reserved but not used, so far.
  • The assert keyword is used in an assert statement (we will talk about this in Chapter 4, Exception Handling).
  • The synchronized keyword is used in concurrent...