Arguments related to Java Platform Module System
Java 9 comes with a new set of arguments related to the Java Platform Modular System (JPMS).
Besides the module path there are other new arguments which can change the behavior of the application.
These can be used during both compile time and runtime.
Except the module path, these extra arguments should not be needed for compilation and execution of the main code
(if they are needed, then maybe the module-info.java file is incomplete).
But they may be needed for compilation and execution of tests.
In such case, at runtime it is useful to know which extra arguments were used at compile time.
Debugging information
If the compilation fails, version 4 of the Maven Compiler Plugin generates one of the following files,
depending on which scope (main or test) cannot be compiled:
These files are usually not generated when the build is successful,
but their generation can be forced by providing the --verbose option to the mvn command.
- Main:
target/javac.args - Test:
target/javac-test.args
The following arguments are of particular interest, because they may be required at runtime.
These arguments should appear in the javac-test.args file only, not in javac.args.
--upgrade-module-path--add-exports--add-reads--add-modules--limit-modules--patch-module