Applying the concepts to address book viewer

We've learned about a couple of powerful ways in which we can tweak the default behavior of module dependencies in Java 9. Let's get hands-on now and apply some of these to our address book viewer application.

Creating a custom aggregator module

Notice that we have two modules in the address book viewer application that provides a view of the address book. The packt.addressbook module shows a simple list of contacts in command line. The packt.addressbook.ui module shows the address book contacts and details in UI form. Both these modules happen to use the two utility modules to get the list of contacts (packt.contact) and to sort them (sort.util). Here, we have just...