Why IntelliJ Shows Red Import Errors After Changing JDK and How to Fix Them

After changing a project's JDK in IntelliJ IDEA, imports of your own classes may appear in red despite the code compiling, but you can eliminate these false errors by invalidating caches and restarting the IDE, as detailed in this step‑by‑step guide.

Import ErrorsIntelliJ IDEAJDK Configuration

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Why IntelliJ Shows Red Import Errors After Changing JDK and How to Fix Them