Intellij: SBT-based Scala project does not build with Java 9

Question

I've tried to switch my Scala/sbt based project to Java 9. If I compile the project with sbt, it works.

If I try to build the project with the Build option of IntelliJ, I get immediately the error

Error:Module 'xyz' production: java.lang.NoClassDefFoundError: javax/xml/bind/DatatypeConverter

I've tried to add the module as dependency

libraryDependencies += "javax.xml.bind" % "jaxb-api" % "2.3.0"

and added in the compiler settings of IntelliJ (javac as well the scala compiler)

  <option name="ADDITIONAL_OPTIONS_STRING" value="--add-modules java.xml.bind" />

but does not help, unfortunately.

Answer 1

1. Open [File -> Settings -> Build, Execution, Deployment -> Compiler]
2. Add "--add-modules java.se.ee" to [Shared build process VM options]

Answer 2

Moving this as an answer to serve as a temporary suggestion unless there is a definite solution to it and to club together few other points.

Seems like scala is not yet complete in terms of readiness to be used with JDK-9 as visible at scala/scala-dev - Support JDK 9

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On the other hand, the way of solving the dependency on the javax.xml.bind could be currently categorized into two categories:-

• Your project uses a library which in turn requires javax.xml.bind, in which case there is not much in your hands other than waiting for that library to move to a modular structure prior to your restructuring. However, this can then be temporarily hacked by the --add-modules javax.xml.bind option provided as the compiler argument.

• Your project makes use of the javax.xml.bind directly. In which case the ideal solution is to move away from the module and make use of the dependency[jaxb-api:2.3.0] and refactor code accordingly.

Answer 3

In addition to @nullpointer answer, short instruction how to use --add-modules

Open File -> Settings -> Build, Execution, Deployment -> Compiler, and add --add-modules java.xml.bind to Shared build process VM options

Answer 4

In addition to the above answers.

If you are not using IntelliJ and running the program from sbt console, I found the following resolved the issue:

• Adding the following to your build.sbt:

  libraryDependencies += "javax.xml.bind" % "jaxb-api" % "2.3.0"

• Adding the import statement to your controller:

  import javax.xml._