Modules

// module-info.java
module foo.bar{ }

// exports: exposing a package
module foo.bar{
	exports foo.bar.testpack;
}

// requires: using another module
module foo.bar{
	requires another.module;
}

// exports to: exposing a package to certain module only
module foo.bar{
	exports foo.bar.testpack to another.module;
}

// requires transitive: foo.bar requires newmod AND any module that requires (include) foo.bar will also automatically requires (include) newmod module
module foo.bar{
	requires transitive newmod;
}

// if requiresments don't exist then its a compiler error
// no two "requires/requires transitive" are allowed on same package name in the same module since its redundant


// opens: enables another module to call opened package via reflection
module foo.bar{
	opens foo.bar.testpack;
}
module foo.bar{
	opens foo.bar.testpack to another.module;
}

// open entire module
open module foo.bar.testpack { }
// no redundant open statements allowed inside now

# modules are in "app-jars" dir, initial module is "my.module"
$ java --module-path app-jars --module my.module