Sybex Practice Tests 11 - Chapter 7 Java Platform Module System, Page 252, Question #35

[Abderrazak Zaouiati]

Hello,

The answer for the question 35 in Chapter 7 Java Platform Module System, Page 252, was maybe incorrect, since the "import" keyword can also be used in module-info.java

The given answer in the book was B, to say, only "uses" keyword can be used in module-info.java

Regards

[Jeanne Boyarsky]

I think the book is right. I checked the Java Language Specification and it contains this for modules

ModuleDirective:
requires {RequiresModifier} ModuleName ;
exports PackageName [to ModuleName {, ModuleName}] ;
opens PackageName [to ModuleName {, ModuleName}] ;
uses TypeName ;
provides TypeName with TypeName {, TypeName} ;
RequiresModifier:
(one of)
transitive static

Nothing about import.

[Stephan van Hulst]

That's because module-info.java is not a ModuleDeclaration. It's a ModularCompilationUnit. A modular compilation unit contains both import declarations and a module declaration.

Import statements in module-info.java are useful when you're referencing type names in the module declaration. Here is an example:

import com.example.api.ExampleService;
import com.example.provider.ProvidedExampleService;

module com.example.provider {

  requires com.example.api;

  provides ExampleService with ProvidedExampleService;

}

[Abderrazak Zaouiati]

Hello,

Agreed, but the question is "How many of these keywords can be used in a module-info.java file: closes, export,
import, require, and uses?" there is no reference to "module declaration", the question just asks about keywords that can be used inside module-info.java file, in my opinion import should also be correct

[Stephan van Hulst]

I agree with you, I was replying to Jeanne.

[Jeanne Boyarsky]

Have a cow! I did not know that. I thought you had to have all mentions fully qualified.

I'm not putting this in the errata because the book doesn't cover it.But I making a note for next time.