Java 9 Nested (hierarchical or parent / child) modules

Question

Is it possible to create based on inheritance (or nested) modules in Java 9?

Something like that:

module a
   |
   ├── module a1
   |   
   └── module a2

In this example, both the module a1and a2are the child elements a.

If I import one of the child modules, I would get the parent ( a) functionality along with any functionality defined in this child element. That is, I could import a1and explicitly access the functions of both a, and a1(but not a2).

Both a1and a2are aand can apply to all packages awithout opening the packages for them a.

Answer 1

, , requires transitive exports to:

• requires transitive: , . , a1 a2 a.
• exports to: ; a a1 a2, .

, :

module a {
    exports com.internal to a1;
    exports com.internal to a2;
}

module a1 {
    requires transitive a;
}

module a2 {
    requires transitive a;
}

, a1, a ( ) com.internal, a1 , .

, . a1 a a. , a1 a a; JLS (IE: exports * to a1, a1 a a, ), , .