How to run Java 9 application with classpath rather than module path in IDEA?

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When I run a main class in IDEA, it puts the module and its dependencies on a module path. Is it possible to change it to a classpath?

module-path java-9 java-platform-module-system intellij-idea java
2 Answers

To answer the question, the heuristic IDEA uses to run an application with a module path is currently slightly off (IDEA 2018.01). It apparently takes more into consideration than it should.

See IDEA-187390 and IDEA-193714 for details.

So if your current project does not have a module-info file and you still end up with a module path the current case that I know is that you are running the main class from a dependency. Just build a small wrapper inside your project and run the main class from there, that brings you back to the classpath.

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