'Intellij Error:(3, 4) java: modules are not supported in -source 8 (use -source 9 or higher to enable modules)

Edit - this is solved - the issue was solved by setting: "Settings -> Build, Execution, Deployment - Java Compiler -> Project Bytecode Version : 9"

I'm following the example/tutorial at https://www.logicbig.com/tutorials/core-java-tutorial/modules/getting-started-in-intellij.html

This is NOT a maven project. I have set the source level to 9 in the project structure eg

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I have set the project level to 9:

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I am getting "Error:(3, 4) java: modules are not supported in -source 8 (use -source 9 or higher to enable modules)" error when trying to build/run the project's main class.

And yes I have seen Intellij IDEA 2018.1 Jdk10 cannot run test which is unanswered.

I have just updated Intellij to 2019.2.4 but the issue remains. I am using SDK 11. How can this be fixed? Thanks.

Edit: the Run/Debug configuration options:

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Edit: the error:

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Edit: the platform SDK:

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Edit: the dependencies panel:

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FWIW, the contents of the iml files show language level 9:

<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_9" inherit-compiler-output="true">
    <exclude-output />
    <content url="file://$MODULE_DIR$">
      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
    </content>
    <orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
  </component>
</module>

<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_9" inherit-compiler-output="true">
    <exclude-output />
    <content url="file://$MODULE_DIR$">
      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
    </content>
    <orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
    <orderEntry type="module" module-name="common.widgets" />
  </component>
</module>
javaintellij-ideajava-9java-module


Solution 1:[1]

This is solved - the issue was solved by setting: "Settings -> Build, Execution, Deployment - Java Compiler -> Project Bytecode Version : 9"

Thanks to all who gave their time to try to help.

Solution 2:[2]

Set SDK

I think you must be setting SDK under Platform Setting in project structure

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Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 JL_SO
Solution 2 Vinay Prajapati

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