Modular Programming in Java 9

Automatic modules

In order to avoid the problems with third-party library dependencies, which we just discussed, the Java platform has a mechanism to automatically create modules from JAR files. You don't need to access the library code or even create a module descriptor. All you need is the JAR file. This works great because, for any third-party library, the one thing that you are sure to have is the JAR file!

Okay, what does it take to convert a JAR file into an automatic module and drop them into your application? The answer is--nothing! All you need to do is drop any JAR file into the module path. The platform automatically converts it into a module. Here are the things that the platform does to every JAR that it encounters in the module ...