How to fix the Release Version 5 Not Supported error in IntelliJ

What do you do when you create a new Maven Java project, and when you run it, you get the following error:

Error:java: error: release version 5 not supported

Solution

Open the project’s pom.xml file and add the following snippet:

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>

Now open the Maven side-panel, and click the Report All Maven Projects button.

You can now successfully run your new Maven Java project.

Additional Notes

By default, the project bytecode version is not actually set in Java maven projects.

Therefore it believes that your current version is set to 5.

Open up Project Settings>Build,Execution…>compiler>java compiler and change your bytecode version to your current java version.

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