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

User thread versus daemon

There is a particular kind of thread called a daemon.

The word daemon has an ancient Greek origin meaning a divinity or supernatural being of a nature between gods and humans and an inner or attendant spirit or inspiring force.

In computer science, the term daemon has more mundane usage and is applied to a computer program that runs as a background process, rather than being under the direct control of an interactive user. That is why there are the following two types of threads in Java:

  • User thread (default), initiated by an application (main thread is one such an example)
  • Daemon thread that works in the background in support of user thread activity

That is why all daemon threads exit immediately after the last user thread exits or are terminated by JVM after an unhandled exception.