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

Java processes

As you may have guessed already, JVM does not know anything about the Java language and source code. It only knows how to read bytecode. It reads the bytecodes and other information from .class files, transforms (interprets) the bytecodes into a sequence of binary code instructions specific to the current platform (where JVM is running), and passes the resulting binary code to the microprocessor that executes it. When talking about this transformation, programmers often refer to it as a Java process, or just process.

The JVM is often referred to as a JVM instance. That is because every time a java command is executed, a new instance of JVM is launched, dedicated to running the particular application as a separate process with its own allocated memory (the size of the memory is set as a default value or passed in as a command option). Inside this Java process, multiple...