Book Image

Learn Java 12 Programming

By : Nick Samoylov
Book Image

Learn Java 12 Programming

By: Nick Samoylov

Overview of this book

Java is one of the preferred languages among developers, 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 will then focus on understanding object-oriented programming (OOP), with exclusive insights into concepts like 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. You will 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, which will hone your skills in building professional-grade apps. Further on, you’ll understand how to create a graphic user interface using JavaFX and learn to build scalable apps by taking advantage of reactive and functional programming. By the end of this book, you’ll not only be well versed with Java 10, 11, and 12, but also gain a perspective into the future of this language and software development in general.
Table of Contents (25 chapters)
Free Chapter
Section 1: Overview of Java Programming
Section 2: Building Blocks of Java
Section 3: Advanced Java

JVM Structure and Garbage Collection

This chapter provides readers with an overview of Java Virtual Machine (JVM) structure and behavior, which are more complex than you might expect.

A JVM is just an executor of instructions according to the coded logic. It also finds and loads into the memory the .class files requested by the application, verifies them, interprets the bytecodes (that is, it translates them into platform-specific binary code), and passes the resulting binary code to the central processor (or processors) for execution. It uses several service threads in addition to the application threads. One of the service threads, called garbage collection (GC), performs an important mission of releasing the memory from unused objects.

After reading this chapter, readers will better understand what constitutes Java application execution, Java processes inside JVM, GC, and...