Book Image

Java 11 Cookbook - Second Edition

By : Nick Samoylov, Mohamed Sanaulla
Book Image

Java 11 Cookbook - Second Edition

By: Nick Samoylov, Mohamed Sanaulla

Overview of this book

For more than three decades, Java has been on the forefront of developing robust software that has helped versatile businesses meet their requirements. Being one of the most widely used programming languages in history, it’s imperative for Java developers to discover effective ways of using it in order to take full advantage of the power of the latest Java features. Java 11 Cookbook offers a range of software development solutions with simple and straightforward Java 11 code examples to help you build a modern software system. Starting with the installation of Java, each recipe addresses various problem by explaining the solution and offering insights into how it works. You’ll explore the new features added to Java 11 that will make your application modular, secure, and fast. The book contains recipes on functional programming, GUI programming, concurrent programming, and database programming in Java. You’ll also be taken through the new features introduced in JDK 18.3 and 18.9. By the end of this book, you’ll be equipped with the skills required to write robust, scalable, and optimal Java code effectively.
Table of Contents (18 chapters)

Creating a modular JAR


Compiling modules into a class is good, but it is not suitable for sharing binaries and deployment. JARs are better formats for sharing and deployment. We can package the compiled module into JARs, and the JARs that contain module-info.class at its top level are called modular JARs. In this recipe, we will look at how to create modular JARs, and we'll also look at how to execute the application, which is composed of multiple modular JARs.

Getting ready

We have seen and created a simple modular application in the Creating a simpler modular application recipe. In order to build a modular JAR, we will make use of the sample code available at Chapter03/3_modular_jar. This sample code contains two modules: math.util and calculator. We will create modular JARs for both the modules. 

 

 

 

How to do it...

  1. Compile the code and place the compiled classes in a directory, say, mods:
      javac -d mods --module-source-path . $(find . -name *.java)
  1. Build a modular JAR for the math.util...