Project JDK is not defined [IntelliJ IDEA]

Error - Project JDK is not defined
Error - Project JDK is not defined

If you get the message - "Project JDK is not defined" on IntelliJ IDEA when trying to run your Java (Android) code then you have not set your JDK with the IDE,


Simply click on "Setup JDK" (you will see it at the right side of the message line) and select the JDK that are available - "JDK 8" in my case, once you select a JDK, indexing may take up some time and you should see a green check sign.

You should now be able to Build and Run Java code.

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