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
1
Section 1: Overview of Java Programming
5
Section 2: Building Blocks of Java
15
Section 3: Advanced Java

Using pool of threads

Each thread requires resources—CPU and memory. It means the number of threads must be controlled, and one way to do it is to create a fixed number of them—a pool. Besides, creating an object incurs an overhead that may be significant for some applications.

In this section, we will look into the Executor interfaces and their implementations provided in the java.util.concurrent package. They encapsulate thread management and minimize the time an application developer spends on writing the code related to threads' life cycles.

There are three Executor interfaces defined in the java.util.concurrent package:

  • The base Executor interface: It has only one void execute(Runnable r) method in it.
  • The ExecutorService interface: It extends Executor and adds four groups of methods that manage the life cycle of the worker threads and of the executor...