Modular Programming in Java 9

Creating Your First Java Module

In the previous chapter, we took a detailed look at the problems associated with modularizing Java code pre-Java 9, as well as the new module construct in Java 9 and Project Jigsaw. Before we examine how Java modularity solves these problems, you'll need to first understand what a Java module looks like. In this chapter, you'll create your first Java 9 module and learn what it takes to build and execute code in a Java module. Here are the top-level topics you'll be learning in this chapter:

• Setting up the JDK with Java 9
• Creating a new Java 9 module
• Defining a module (using module-info.java)
• Compiling and executing a module
• Handling possible errors

You'll be building a sample Java 9 application throughout ...