package javax.jnlp is declared in module java.jnlp, which is not in the module graph

Question

I have a project that uses Java webstart technology. I decided to upgrade the Java version from 8 to 9. However, I faced the following error on compiling:

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Answer 1

In IntelliJ IDEA: Add javaws.jar to Classpath(File -> Project Structure -> SDKs ->Class) C:\Program Files\Java\jdk-version\lib\javaws.jar