java 13 preview options with Maven

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Danila Ikryannikov
Created

Idea Ultimate 2012.2. I'm trying java 13 preview features with OpenJdk 13 (early-access).

In pom.xml I use: 

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.8.1</version>
    <configuration>
        <compilerArgument>--enable-preview</compilerArgument>
        <source>13</source>
        <target>13</target>
    </configuration>
</plugin>

it's anough for Maven.

But when I set language level to "13 (preview)" in Idea, I see: "Module... is imported from Maven. Any changes made... may be lost after reimporting"

And, really, the level is reset every time when pom.xml is changed.

How can I set "preview" language level permanently in a maven project?

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Andrey Dernov
Created

Where do you change the language level?

The effective level is set for the module in modules settings Sources tab:

This works fine for me with 2019.2.1 RC.

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Danila Ikryannikov
Created

Yes, it's here. I have no problem with the level "13 (No new...)". What about the "13 (preview)" language level in your version?

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Andrey Dernov
Created

>What about the "13 (preview)" language level in your version?

There is an issue currently with the "Preview" language levels: https://youtrack.jetbrains.com/issue/IDEA-212618

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Danila Ikryannikov
Created

Thanks, I added my vote to the issue.

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