14. Lesson Conclusion

Lesson Conclusion

Glossary

Automatic module: A module created by placing a non-modular jar on the modulepath. Has the same name as the jar, unless another name is provided by the Automatic-Module-Name property in the MANIFEST.MF.

Circular Dependency: A loop created when a module depends on another module, which in turn depends on the first module. Will not compile.

Classpath: The location the Java compiler looks to find all your class files when compiling a Java project. Prior to Modules, this was the only location to provide class files.

Compile-time Access: Required for actions validated by the compiler, such as creating instances of classes and calling their methods.

Modular Jar: A standard JAR file that also contains a module-info.class.

Module: An organizational construct one tier above a package. It contains multiple packages and uses a module descriptor to identify which of those packages it makes available to other modules.

Module Descriptor: A Java class that provides information about the module. It is stored in a class called module-info.java and compiles into a class file called module-info.class.

Modulepath: The location the Java compiler looks to find all modules when compiling a Java project. Any non-modular jars placed on the modulepath will become automatic modules.

Runtime Access: Required for actions not validated by the compiler, such as retrieving and executing the methods of a class via the Reflection API.

Unnamed Module: The single module containing all the contents of the classpath. Inaccessible to named modules.