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Learn Java 17 Programming

Learn Java 17 Programming - Second Edition

By : Nick Samoylov
3.3 (12)
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Learn Java 17 Programming

Learn Java 17 Programming

3.3 (12)
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)
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1
Part 1: Overview of Java Programming
5
Part 2: Building Blocks of Java
15
Part 3: Advanced Java

Java reference types

A new operator creates an object of a class and returns the reference to the memory where the object resides. From a practical standpoint, the variable that holds this reference is treated in the code as if it is the object itself. Such a variable can be a class, an interface, an array, or a null literal that indicates that no memory reference is assigned to the variable. If the type of reference is an interface, it can be assigned either null or a reference to the object of the class that implements this interface because the interface itself cannot be instantiated.

A JVM watches for all the created objects and checks whether there are references to each of them in the currently executed code. If there is an object without any reference to it, JVM removes it from the memory in a process called garbage collection. We will describe this process in Chapter 9, JVM Structure and Garbage Collection. For example, an object was created during a method execution and...

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Learn Java 17 Programming
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