JDK source code reorganized

In a previous section, you learned that the pre-Java 9 source code organization schema was as follows:

    source code / [shared, OS-specific] / [classes / native] / Java API 
     package name / [.file extension]

In Java 9, we have a new modular schema. That schema follows:

    source code / module / [shared, OS-specific] / [classes / native / 
    configuration] / [ package / include / library ] /
     [.file extension]

There are a few differences in the new schema, most notably the module name. After the shared or OS-specific directory, there is either the classes directory, the native directory for C or C++ source files, or a configuration directory. This seemingly rudimentary organization schema changes results in a much more maintainable code base.