Planned lessonMID-010-L02

Writing module descriptors

On This Lesson 4 topics

This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.

In this lesson

write a module-info.java.

Place module-info.java at the source root; the module name is usually reverse-domain style.
requires declares a dependency; requires transitive passes it on to users.
exports makes a package accessible to other modules; unexported packages stay hidden even if public.
exports ... to limits to named modules.
A JAR with a descriptor on the module path is a module; unnamed or automatic modules cover legacy JARs.

Draft outline details

java

module com.shop.core {
    requires java.sql;
    exports com.shop.core.api;
}

Can another module use a public class in a non-exported package?

Show answer

No.

Apply this lesson with the module's lab, exercises and quiz.

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